Top Driven Bowen Barco

Document Number Printed in U.S.A. 101-341-01

TD350P TOP DRIVE CARE AND OPERATING MANUAL

EPL-1493 (Rev. 01)

For

PATTERSON DRILLING

Serial Number: 309 & 311

Top Drive

Document Number II 101-341-01

CARE AND OPERATING MANUAL

Model TD350P

Top Drive Drilling System

NOTICE

The information contained in this document is subject to change without notice.

NATIONAL OILWELL VARCO SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR

CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.

This document contains proprietary information, which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced or translated to

another language without the prior written consent of National Oilwell Varco.

Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.

All rights reserved. Printed in the U.S.A.

Model TD350P Top Drive Drilling System Document Part Number (EPL-1493)

Document Revision (01)

Document number EPL-1493 Revision 01 Section 1

SECTION 1

TABLE OF CONTENTS

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Top Drive

Document Number III 101-341-01

TD350P TOP DRIVE DRILLING SYSTEM

Serial Numbers: 309, 311

Section Document Number

1. Table of Contents ……………………………………………………………101-341-01 2. Introduction……………………………………………………………………200-003-01

Safety Notices General Notices

3. General Operating Procedures …………………………………………350-015-01 Start-Up Procedures After Rig Up

Power unit Start-up Top Drive Function Tests Connecting Elevator Links Setting Counterbalance Valves Torque Breakout Tool (TBT) Torque Setting Setting Torque Cylinder Pressures Setting Clamp Cylinder Pressures Using the TBT to Breakout Drill Stem Using the TBT to Make Up Drill Stem

4. General Operating Procedure……………………………………………600-300-01

Start-Up Troubleshooting Guide

5. Maintenance……………………………………………………………………300-013-01

Recommended Maintenance Schedule Grease Washpipe Packing Replace Washpipe Packing Repair of Washpipe Packing Box Assembly Inspect Motor Case Drain Change Swivel Case Lubricating Oil Inspect Hoses and Fittings Inspect Fasteners Grease Upper Assembly Bearing Grease Link Adapter Compensator Adjust Link Adapter Alignment and Spacing Adjust Link Tilt Cylinder Clamps Inspect Link Tilt Cylinders Grease Link Cylinder Pivots Inspect Backup Wrench Tong Dies Inspect Torque Cylinders

Top Drive

Document Number - IV- 101-341-01

TD350P TOP DRIVE DRILLING SYSTEM

Serial Numbers: 309, 311

Section Document Number 5. Maintenance (continued)…………………………………………….……300-013-01

Inspect Rig Interface Mounting Bolts Inspect Track Hanger Assembly Certify Cable Hanger Assembly Inspect Pivot Arm Connector Pins and Bushings Grease Lifting Lugs Inspect Connecting Pins Change Auxiliary Power Unit Fill/Drain Filter Replace Fuel Level Sight Tube Drain Condensate From Fuel Tank Inspect Gearbox Oil Level Inspect Filter Indicators Replace High Pressure Filters Replace Return Filters Replace Charge Pump Filters Steam Clean Power Unit


SECTION 2

INTRODUCTION

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Document Number: 200-003-01

Top Drive

TD350P Introduction

Introduction TD35OP PORTABLE TOP DRIVE

Document Number: 2 200-003-01

This manual is published as a general guide for the normal care and operation of your NATIONAL OILWELL VARCO Top Drive. Because of the many factors, which normally contribute to the proper function or malfunction of the Top Drive, and not having complete knowledge of each factor or combination of factors, we cannot detail all facets of this subject. We therefore confine the scope of this presentation, and when situations encountered are not fully encompassed by complete and understandable instructions, these situations must then be referred to NATIONAL OILWELL VARCO. When other than routine maintenance or servicing is necessary, it can be most efficiently performed if the unit or primary component is removed from service to an area of adequate space where an overhead crane, hydraulic lift, bearing pullers, impact tools, shelter, etc., are available and readily accessible. The dimensions and tolerances specified in this publication are those desirable for the most

efficient operations of the Top Drive. When components become worn beyond limits specified, they should be replaced.

Improvements in design, engineering, material, production methods, etc., may necessitate changes in the Top Drive and result in inconsistencies between the contents of this publication and the physical equipment. NATIONAL OILWELL VARCO reserves the right to make these changes without incurring any liability or obligation beyond that stipulated in the purchase contract. THE PICTURES, PHOTOGRAPHS, CHARTS, DIAGRAMS, DRAWINGS, WRITTEN CONTENTS AND SPECIFICATIONS CONTAINED HEREIN ARE NOT TO BE CONSTRUED AS GIVING RISE TO ANY WARRANTY ON THE PART OF NATIONAL OILWELL VARCO. NATIONAL OILWELL VARCO MAKES NO WARRANTY, EITHER EXPRESSED OF IMPLIED, BEYOND THAT STIPULATED IN THE PURCHASE CONTRACT. The drawings, pictures and photographs may be of similar equipment and may not appear exactly like your product. The function and the operating instructions should be valid for your product.



SAFETY NOTICES The following safety notices were compiled from the Care and Operation Manual and are presented here for quick and easy reference. Carefully review the Care and Operation Manual to insure that all safety concerns are fully understood.

DANGER Items that can result in personal injury are preceded by DANGER warnings.

CAUTION Items that can result in equipment damage are preceded by CAUTION warnings. Although CAUTION warnings are noted for potential equipment damage, personal injury is always a possibility and must be taken into account.

DANGER • To avoid electric shock, only qualified electricians should connect electrical power to the

Bowen TD35OP Top Drive. • Keep personnel clear of extended elevators at all times as severe personal injury could

result if the elevators dropped rapidly. • Do not drain swivel oil after unit has been in prolonged operation. The temperature of the

oil may be as much as thirty (30) degrees higher than the exterior of the swivel case and drive casing.

• Do not rotate the pipe handling system when greasing the upper assembly bearing as severe personal injury could result.

• Do not operate top drive when greasing washpipe packing as personal injury could result.

CAUTION • The elevators and links will move forward abruptly. Insure that the elevator has free travel

beyond the mouse hole. • Do not have the speed set above 25 rpm, as smaller drill pipe tool joint connections may

over torque. • Do not use clamp pressures greater than is required for the tool joints that are being run, as

backup clamps may damage the tool joint leading to connection failure during operation. • The kelly valve actuator weighs approximately 200 pounds and must not be handled

without a suitable lifting device. • Do not over tighten the link adapter compensator adjustment nut, or the link adapter will

not seat against the load collar while loaded and severe equipment damage could result.



GENERAL NOTICES

NOTE The Bowen TD350P Top Drive requires 110 VAC, 1OA, 60 Hz electrical power to operate. The auxiliary power unit requires 440 VAC, 20A, 60 Hz, 3-phase to operate. Care must be exercised to insure that the electrical hookups are in accordance with the following wiring diagram (see figure 1).

• The Bowen TD35OP Top Drive requires a minimum 100 psi air supply to operate. Do not operate system when air supply is below 100 psi as pressure fluctuations can affect overall system performance.

• Insure all hydraulic lines are connected between the top drive and power unit. Insure that the Motor Case Drain is connected first. Insure air supply line is connected to engine starter.

• Controls and indicators in the following procedures are identified by Bold Faced Type and are listed as they are marked on the unit.

110 VAC IN


SECTION 3

GENERAL OPERATING PROCEDURES

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Top Drive

TD350P General Operating

Procedures

General Operating Procedures TD35OP PORTABLE TOP DRIVE


START-UP PROCEDURE FOR TD35OP AFTER COMPLETION OF RIG UP Due to the various configurations available for the Bowen Model TD35OP Top Drive, some component locations may be different from what is called out in this Stan-up and Maintenance Guide. The components still function the same; only the location is different. POWER UNIT START-UP 1. Observe Supply Air Pressure gauge on local control gauge panel (see figure 2) to

verify steady 100 psi (minimum) air supply. 2. Switch Power switch to 110 VAC Line In and confirm AC supply by observing the

110 VAC Line In and the Low Charge Pressure indicator lights (see figure 3). If power is available, these lights will be lit.

NOTE: The TD35OP has an uninterruptible power supply (UPS) backup that automatically kicks in if control power is ever lost to the power unit. The system is provided with an OFF switch when control power is disconnected to prevent power drain on the UPS. 3. Insure all hydraulic ball valves are in their normal operating condition as indicated

by the individual valve labels.

NOTE: Valves labeled N CLOSED are normally closed during operations and valves labeled N OPEN are normally opened during operations. 4. Check to be certain the air intake flapper valves on the engine are in the open

position and that the AMOT control has been reset.

5. Shift the three position Engine Speed selector switch on the local junction box to

Idle (see figure 3). 6. Shift the three position Local Control-Start-Remote Control (L-S-R) selection

switch on the local junction box to Start.



FIGURE 2 Local Control Box

FIGURE 3 Electrical Wiring Diagram

7. Be certain all personnel are clear and then depress the engine Start button on the

engine gauge panel (see figure 4) until the engine starts. Verify that the Low Charge Pressure light goes out and that charge pump pressures stabilize around 475 psi (see figure 3).

NOTE: Refer to engine operator’s guide if engine fails to start

8. Switch L-S-R selection switch to Local Control and verify that the indicator light is

lit. 9. Reduce the throttle air regulators to 0 pressure (see figure 2). The regulators are

clearly identified for 1800 RPM and 2100 RPM engine speed settings. They are located on the local control gauge panel just above the junction box. Reduce the air pressure by pulling out on the valve lock and rotating knob counter clockwise.

10. Shift the engine speed selector switch to the 1800 RPM position.



Start Button FIGURE 4

Engine Gauge Panel

11. Return to the 1800 rpm throttle regulator and slowly increase air pressure, as indicated on the gauge directly above the pressure regulator, until the engine is at 1950 rpm as indicated on the engine tachometer located on the engine gauge panel. Push in the pressure regulator valve lock.

12. Shift engine speed selector to Idle and then back to 1800 RPM to insure that

pressures are correct and engine speed maintains 1950 rpm. If engine speed is not 1950 rpm, repeat steps 11 and 12.

NOTE: When initially setting the engine speed, it will be necessary to fine tune the regulator to consistently get 1950 rpm. Insure that the engine consistently reaches 1950 rpm during these steps. If the engine speed is below 1900 rpm, top drive operations will be severely affected. 13. Shift the engine speed selector switch to the 2100 11PM position. 14. Repeat steps 11 and 12 for the 2100 rpm regulator, but set engine speed to 2250 rpm.



FIGURE 5 Driller’s Remote Control Console

NOTE: When initially setting the engine speed, it will be necessary to fine-tune the regulator to consistently get 2250 rpm. Insure that the engine consistently reaches 2250 rpm during these steps. If the engine speed is below 2200 rpm, top drive operations will be severely affected. 15. Shift the engine speed selector switch to the Idle position. 16. Insure that the following remote console controls are in the listed position (see figure

5):

Speed:………………………... At zero and pushed in Drill Torque Limits: ………... 0 Engine Speed: ……………….. Idle Makeup Torque Limits: ……. 0 TD Motor Brake: ..….………. Set Emergency Stop: ……………. Pulled out

17. Shift the mode selector switch from local control to remote control and verify that

the Remote Control Enable light is lit (see figure 4). If the indicator fails to light, check the remote console to see if the Control OK light is lit (see figure 5). If Control OK is lit, then the bulb needs to be replaced on the remote control enable indicator.

NOTE: If both lamps fail to light refer to troubleshooting section in this manual.



TOP DRIVE FUNCTION TESTS 1. Raise the top drive to a position that allows the elevators to clear the floor. 2. Set the Engine Speed selector switch to 1800 and verify the engine accelerates to

1950 rpm. Switch to 2100 and verify that engine speed increases to 2250 rpm. Return the switch to 1800.

3. Position the Motor Brake selector switch to Set. 4. Position Drilling Torque Limit to 1000. Slowly increase swivel speed by rotating the

throttle control knob counter clockwise. The stem should not rotate. Return throttle to Zero.

5. Once verified the brake is functional, shift the Motor Brake switch to Release and

shift engine speed to Idle. 6. Push the Emergency Stop button. After confirming the engine is stopped, repeat

steps 1 through 17 for power unit start up and reset intake flappers and AMOT controller.

7. Shift the Kelly Valve switch to the Close position. The upper kelly valve should

close. Physically verify the kelly valve is closed by looking inside the drill stem with a flashlight or by inserting a rod long enough to reach the valve ball.

8. Shift the Kelly Valve switch to the Open position, and observe the indicator.

Physically verify the kelly valve is open by looking inside the drill stem with a flashlight or by inserting a rod long enough to reach the valve ball.

9. Shift the Reposition switch to the left. The pipe handler assembly should rotate.

Allow one complete revolution.



FIGURE 6 Mousehole Position Reflect Degree of Travel

Connecting Elevator Links: 10. Attach links to link adapter and raise top drive until links are hanging free. 11. Center link cylinders by bumping link control to Center position. 12. Position link clamps onto links insuring that rod clevis pin holes are centered in the

clamp slots. 13. Install clamp pins and tighten clamp bolts. 14. Shift the Reposition switch to the right. The pipe handler should rotate the opposite

direction. 15. Rotate the pipe handler so that the backup wrench torque tube is towards the mouse

hole, (see figure 6) and engage the Link Tilt cylinder lever to the mouse hole position by bumping the lever to the MH position.



CAUTION

The elevators and links will move forward abruptly. Insure that the elevator has free travel beyond the mouse hole.

DANGER

Keep personnel clear of extended elevators at all times as severe personal injury could result if the elevators dropped rapidly.

Setting Counterbalance Valves: The following procedure is to be used to set the link tilt cylinder control manifold counter balance valves.

A. With the elevators extended, loosen jam nuts on counterbalance valves.

B. Back out counter balance valve adjustment screw until one cylinder begins to extend and elevators begin to drop.

C. Screw in on the adjustment screw until the cylinder just stops extending.

D. Repeat steps B and C for the second counterbalance valve.

E. Tighten valve jam nuts.

16. Center elevator by bumping the Link Tilt control switch to the Center position.

When the elevator has traveled approximately half way to the center position, bump the switch to the MH position. The elevator should stop movement and maintain position.

17. Bump the Link Tilt lever to the Center position. 18. Rotate the pipe handler so that the backup wrench torque tube is away from the

mouse hole (see figure 7). 19. Bump the Link Tilt lever to the FB position. Once full travel has been reached,

center the elevator. NOTE: The link cylinders will automatically center after the sequence completes. The sequence Is timed and centering may not be immediate.



FIGURE 7 Fingerboard Position Reflect Degree of Travel

20. Set Make Up drill torque to 6,000 ft lb and insure that swivel throttle is at Zero and in the forward position. Set engine speed to 1800 rpm. Push the Make Up button and the stem on the top drive should rotate to the right. Verify that the rotating speed is satisfactory to the driller. If the speed needs to be changed, adjust the Swivel Make Up Speed control switch, located on the local control panel on the power unit, until a satisfactory speed is attained.

NOTE: Do not have the speed set above 25 rpm as smaller drill pipe tool joint connections may over torque. 21. Verify that the backup wrench is below the saver sub pin threads and will not grip

the threads.



22. Press and release the Break Out button. Allow the sequence to cycle completely. Verify that the following steps occur:

A. The back up wrench clamps extend. B. The shifter cylinder retracts and the torque sleeve engages drill stem.

C. The torque cylinders extend. The drill stem will rotate approximately 20 degrees.

D. The shifter cylinder will extend and the torque sleeve will disengage from the

drill stem.

E. The back up wrench clamps will retract and the torque cylinders will reset. All these functions are computer controlled and are not adjustable by the operators. During this sequence, all other control functions, except Emergency Stop, are locked out and are inoperable. The Bowen TD35OP Top Drive is now ready for full operations. TORQUE BREAKOUT TOOL (TBT) TORQUE SETTING The TD35OP Top Drive can generate approximately 27,000 ft lbs of torque. This is insufficient to break out or make up the drill stem component (upper kelly valve, lower kelly valve and saver sub) connections in the event that one or more of these components must be replaced. The following procedure is to be used to use the TBT to break out or make up sections of the drill stem.

CAUTION

Do not use clamp pressures greater than is required for the tool joints that are being used as backup clamps may damage the tool joint leading to connection failure during

operation.



Make Up Control Gauge

Clamp Control Gauge Clamp Control Valve Make Up Control Valve

PRV1 DCV2 DCV1 PRV2 FIGURE 8 Auxiliary Power Unit Control Stand

Setting Torque Cylinder Pressures: A. Using the Torque Pressure Graph (see figure 9), find the desired torque along the left

side and read across the graph to the diagonal line. Read down from the line to the pressure setting required to achieve the desired torque.

B. Close DCV1 (see figure 8) and manually actuate the make up control valve. Record

the pressure measured on the Auxiliary Control Panel Make Up pressure gauge. This pressure will be used to reset the manifold when resuming operations.

C. Using a 9/16" wrench, loosen the jam nut on the pressure relief valve marked PRV2. D. Actuate the make up valve lever and slowly rotate the adjustment knob on PRV2

until the desired pressure is achieved. Tighten the jam nut and actuate the lever once more to verify the setting.

E. Open DCV1. The torque cylinders are now set to generate the desired torque.



FIGURE 9 Torque Pressure Setting

FIGURE 10 Clamp Pressure Setting

Setting Clamp Cylinder Pressures: F. Using the Clamp Pressure Graph above (see figure 10), identify the diagonal line for

the tool joint GD, then find the desired torque along the left side and read across the graph to the proper diagonal line. Read down from the line to the pressure setting required to hold the desired torque.

G. Close DCV2 and manually actuate the clamp control valve. Record the pressure

measured on the Auxiliary Control Panel Clamp pressure gauge this pressure will be used to reset the manifold when resuming operations.

H. Using a 9/16" wrench, loosen the jam nut on the pressure relief valve marked PRV1. I. Actuate the clamp control valve lever and slowly rotate the adjustment knob on

PRV1 clockwise until the desired pressure is achieved. Tighten the jam nut and actuate the lever once more to verify the setting.

J. Open DCV2. The backup wrench is now set to make up or break out the desired connection.



Using the TBT to Breakout Drill Stem: K. Insure that the Pipe Handler control (located at the power unit junction box) is set

to Break. L. Set clamp cylinder pressures in accordance with steps G through J above. NOTE: The torque cylinders do not require setting as they will produce as much torque as is required (up to 60,000 ft lb) to break out the connection. M. At the drill floor, remove the stabbing bell and then position a stand under the back

up wrench and lower the top drive until the back up wrench jaws can adequately engage the saver sub.

N. Remove slack from carrier chain and then raise top drive until weight of the back up

wrench is carried by the chain. 0. Press the breakout switch and breakout the connection. Repeat until the connection

can be easily unscrewed. P. Lower the top drive until the carrier chain can be removed and then raise the top

drive until the back up wrench sets on the torque tube stops. Remove the saver sub. Repeat steps M through P for each component that must be removed. NOTE: The upper kelly valve actuator must be removed before removing the upper kelly valve.

CAUTION

The kelly valve actuator weighs approximately 200 pounds and must not be handled without a suitable lifting device.



Using the TBT to Make Up Drill Stem: A. Set TBT torque and clamp cylinder pressures in accordance with steps A through J

of TBT torque setting procedures. B. Switch the Pipe Handler control to Make. C. Remove stabbing bell. D. Install component onto drill stem and, using a chain wrench, tighten hand tight. E. At the drill floor, position a stand under the back up wrench and lower the top drive

until the back up wrench jaws can adequately engage the component. F. Remove slack from carrier chain and then raise top drive until weight of the back up

wrench is carried by the chain. G. Press the Breakout switch and make up the connection. Repeat until the connection

is properly torqued. If additional items must be installed, proceed with step H, otherwise skip to step J. H. Lower the top drive until the carrier chain can be removed and then raise the top

drive until the back up wrench sets on the torque tube stops. I. Repeat steps D through G for each component that is to be made up. J. Lower the top drive until the carrier chain can be removed and then raise the top

drive until the back up wrench jaws are at the proper height to adequately engage the stand tool joint connection.

K. Repeat steps A through J of the TBT torque setting procedures to reset the TBT to

the pressure settings required for the particular tool joint that will be used.

L. Return the Pipe Handler control to the Break position.

NOTE:

The unit is not shipped with a preset torque setting. Before first connection is made, insure that the settings are correct for the size and type of tool Joint connections that will be used.


SECTION 4

TROUBLE SHOOTING

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Top Drive

TD350P Troubleshooting

TROUBLESHOOTING TD35OP PORTABLE TOP DRIVE


START UP TROUBLESHOOTING GUIDE Conditions (following start up procedure) Troubleshooting the Problem Solution

HPU won’t start. • Check that Air Supply • If it is not, turn it ON, Pressure is ON. and verify that sufficient pressure is being supplied. See System Pressure Gauges on local panel to ensure a minimum of 100 psi is available before cranking engine.

• Check that 3 position • Shift Selector Switch START-LOCAL-REMOTE to START position. switch is in START position.

• Check that 110 V AC • Verify 110 V AC power connection is okay. cord is installed properly and is live. • Check that 110 V AC • If it is in UPS position switch is on 110 VAC change it to 110 VAC.

position. • Check that Air Intake • If flappers are closed,

Flapper Valves on the close the main air line HPU engine are OPEN. and open dump valve on small air receiver tank. Manually reset flapper valve linkage and make sure AMOT control is RESET.

• Check that the Emer- • If it is not, twist and gency Kill Button on pull out to RESET

the Driller's Remote Console is pulled out.

If any of steps do not alleviate the problem, please contact the nearest service center.



Conditions (following start up procedure) Troubleshooting the Problem Solution

HPU started, • If pressure differences • Change all charge pump but hydraulic charge are significant, check that filters.

pump pressures Charge Pump Oil show significant, Filters are not clogged. • Contact the nearest differences from service center.

each other. NOTE All gauges should be within 10 psi total difference.

Please contact the nearest service center for the necessary adjustments.

HPU started. • Check for air flow • Relocate the Power Charge pressure obstructions to HPU’s Unit where the heat

is okay, hut hydraulic heat exchanger. exchanger fans do not oil is above 150 have an obstructed air flow path. • Ensure Normally OPEN • Reset valve positions. valves to the heat exchanger are OPEN and NORMALLY CLOSED VALVES ARE CLOSED. • Check oil level on • Increase oil level to

reservoir. Level should midway of lower glass be no lower than midway on upper sight level way of lower glass on gauge.

upper sight level gauge.

• Ensure 1000 psi maxi- • Pull relay R5 from its mum is on the gauge at socket inside the control pump 5 while fans are junction box on the ON. If higher, reset fan’s Power Unit. If the fans relief to 1000 psi, come on automatically, leave the relay removed and contact a service immediately!





HPU is okay, • Check that controls on • Set the 3-position Start but can’t get power Driller’s Remote Console Local-Remote switch to Driller’s Remote are in neutral positions to its Remote position Console. Check that Set Throttle knob OFF 3-position Start- set speed switch to IDLE Local-Remote switch Reset Emergency is on REMOTE Kill. position. • Check connections to the • Verify that control cable Driller’s Remote Console. is properly connected. Clean female and male If any of these step does connectors thoroughly. not alleviate the problem, please contact the nearest service center.

HPU is okay. • Check umbilical hose • Check that the number- Driller’s Remote connections. Lines could ing scheme on the hoses

Console is okay, have been improperly is the same and that but cylinders on installed. numbers such as 6 and 9 PHS system are were not confused. actuating differently to each other.

If the step does not alleviate the problem, please contact the nearest service center.

HPU is okay. • Check calibration on • Loosen jam nuts on Driller’s Remote counter balance valves, counter balance valves,

Console is okay, retract cylinders to the but cylinders on If the step does not Mousehole position, PHS system do not alleviate the problem, and turn valves counter maintain position please contact the clockwise with an Allen when at Mousehole nearest service center. wrench until the cylin- and unloaded (no ders maintain position. pipe in elevators). Tighten jam nuts.




HPU is okay. • Check proper position • Set the switch to Break Driller’s Remote on Make-Break mode for breakout of connec-

Console is okay. selector at HPU. tions. Set switch to Cylinders on PHS Make for make up

are okay, of saver sub and kelly but breakout tool stems. makes up rather than breaks out • Check umbilical hose • Check that the number-

hoses connections. connections. Lines could ing scheme on the have been swapped is the same and that when connecting. the Torque A hose is not swapped with the If any of stops do not Torque B hose. alleviate the problem, please contact the nearest service center.

HPU is okay. • Check for air in the • Bleed air by actuating Driller’s Remote system. the Repositioner in

Console is okay. one direction for several Cylinders on PHS minutes until observing

are okay. a better behavior Breakout tool is okay, • Check umbilical hose • Break improperly made

but Repositioner connections. Look for up connections and will not go 360° improper made up quick make them up all the in both directions, couplers and improper way. Lock couplers. numbering scheme. • Repositioner speed • Turn speed control control valves are valves clockwise one screwed in too far. turn and retest. Continue adjusting until desired speed is achieved in both directions. • Pipe handling package • Readjust swivel away rubs track. from the track and recheck well center.

If any of steps do not alleviate the problem, please contact the nearest service center,




HPU is okay. • Check that Engine • Set engine speed to Driller’s Remote Speed is at 1800 rpm. 1800 rpm or 2100 rpm.

Console is okay. • Check that Drill and Set Drill Torque Limit Cylinders on PHS Make Up Torque Limits to the proper limit. Set

are okay. are not zero. Make Up Torque Limit Breakout tool is okay, to the proper limit

but Top Drive does not rotate the drill • Check that Brake switch • Set Brake switch to

string. is on Release position. Release. • Check that Repositioner • Reset throttle to zero and circuit is not holding actuate Repositioner pressure. until it moves and try again to rotate the Top Drive.


HPU is okay. • Check Drill Limit • Reset Drill Limit settings Driller’s Remote settings. Increase and increase Speed

Console is okay. rotational Speed lightly lightly with the Throttle PHS is okay. with the Throttle knob. knob. Breakout tool is okay. Top Drive is drilling • Decrease String Weight. • Lift weight off string

okay, reducing Torque require until torque increases If the step does not ments until swivel and the Torque Limit allevIate the problem, rotates. light comes on. please contact the

nearest service center.




HPU is okay. • Check for 110 V AC • Reconnect 110 V AC line Driller’s Remote supply. to 110 V AC supply.

Console is okay. PHS is okay. • Check Air Supply. • Reconnect Air Hose or Breakout tool is okay, open Supply Valve.

but engine rpm reduces considerably • Check 1800 Throttle • Increase pressure tightly while drilling. Air Pressure at HPU. with air regulator until rpm on HPU engine reaches about 2050 rpm without swivel rotating and throttle at zero position. • Check Fuel Filters • Replace fuel filters. on HPU.

HPU is okay. • Check engine air • Disconnect Emergency Driller’s Remote flappers to confirm Kill hose from cylinder

Console is okay. emergency kill initiated on air flaps. Screw in PHS is okay. by overspeed kill system. slightly on the over Breakout tool is okay. speed safety device Top drive is drilling NOTE: adjustment screw. Test

okay, Do not emergency kill the setting by shifting but HPU shuts down repeatedly while at the Local/Start/Remote when setting engine throttle. Damage to engine switch to Local. Set the speed at 2100rpm. will result Engine Throttle and switch to 2100 and increase the 2100 rpm regulator until the shut- down device engages by releasing air through the disconnected hose at 2400 rpm. Set the Engine Throttle switch to Idle and reconnect hose. Decrease setting on 2100 rpm Air Regulator, switch the Throttle setting to If any of steps do not 2100 rpm, and reset alleviate the problem, Engine Throttle to 2250 please contact the rpm with swivel not nearest service center rotating


SECTION 5

MAINTENANCE

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Top Drive

TD350P Maintenance

MAINTENANCE TD35OP PORTABLE TOP DRIVE


RECOMMENDED MAINTENANCE SCHEDULE Intervals Calendar Daily Weekly Monthly Yearly

Hours 8 150 300 500 1000 2500

washpipe assembly (1) * G washpipe packing (2) R motor case drain (3) I I swivel case oil (4) I R hose and fittings (5) I I fasteners (6) I upper assembly bearing (7) G link adapter compensator (8) G link adapter (9) I link cylinders (10) G I backup wrench (11) I torque cylinder (12) I rig interface mounting bolts (13) I track hanger assembly (14) I I pivot arm pins & bushings (15) I lifting lugs (16) G connecting pins (17) I APU filter (18) AS REQUIRED fuel level sight tube (19) I fuel tank (20) I gearbox oil level I filter indicators (22) AS REQUIRED high pressure filters (23) AS REQUIRED return filters (24) AS REQUIRED charge pump filters (25) AS REQUIRED steam clean power unit (26) I engine Refer to OEM Engine Operator’s Manual * Numbers in parentheses refer to items in text, pages 13 - 43 Codes: G – Grease I – Inspect, service, correct, replace, if necessary R – Replace



MAINTENANCE PROCEDURES FOR TD35OP TOP DRIVE DRILLING SYSTEM This section was developed to provide the operator with specific guidelines that are designed to maximize the performance and operational life of the unit and minimize “downtime” PREVENTIVE MAINTENANCE This section describes the various procedures required to insure that the Bowen TD35OP Top Drive performs to its full capabilities. This section will provide a schedule for maintenance actions based on recommended industry practices and manufacturer’s requirements. Each action is fully described including the tools necessary, parts necessary and step-by-step procedures to complete the maintenance action.



Grease Fitting Spacer Holding Screw FIGURE 1 Lower Packing Nut

(1) GREASE WASHPIPE PACKING Tools Required: Hand pump grease gun

Parts Required: General purpose grease NOTE: The washpipe packing can be greased without shutting down the power unit. Caution must be exercised to insure that swivel does not rotate during greasing to prevent injury to service personnel. PROCEDURE: A. Secure operations. B. Set engine speed to idle and engage swivel brake. C. Connect grease gun to lower packing nut grease fitting (see figure 1) and inject

approximately 10 strokes of grease into the lower packing. D. Disconnect grease gun, release swivel brake and slowly rotate swivel for 5

revolutions to allow grease to distribute throughout packing before applying pressure.

E. Resume operations.



(2) REPLACE WASHPIPE PACKING Tools Required: Rubber mallet, packing nut wrench, Allen wrench, snap ring pliers,

parts list SSS-1 sheet 67, assembly drawing 200741/009 Parts Required: Complete washpipe packing set, washpipe 0-rings, packing lubricant

and washpipe NOTE: To reduce downtime during washpipe packing replacement, the unitized washpipe packing used on the TD35OP Top Drive can be removed as a complete unit. A spare washpipe assembly can then be installed and operations can be resumed. The old washpipe can then be overhauled during normal daily operations. PROCEDURE: A. Secure top drive operations, close upper and lower kelly valves, secure power unit

and engage swivel brake. B. Strike the washpipe packing nut in a clockwise direction until it turns freely. Back

the washpipe packing nut completely off the upper stem. Repeat the procedure for removal of the washpipe holding nut, and back it completely off the gooseneck. The complete assembly may now be removed.

CAUTION

The complete washpipe packing box assembly weighs approximately 100 pounds and should not be lifted without suitable lifting devices.

NOTE: The lower packing nut will slide off of the washpipe. Exercise care when removing the washpipe assembly. C. Install replacement box assembly and tighten packing nuts. D. Grease packing to insure proper seal that the packing has a proper seal on the

washpipe. E. Resume operations.



Holding Nut Washpipe Lower Packing Nut

0-Ring (2 required) Packing Holding Ring Packing Packing Spacers FIGURE 2

Washpipe Packing Assembly Components

REPAIR OF WASHPIPE PACKING BOX ASSEMBLY (Refer to figure 2 above for component familiarization) A. Remove the snap ring on the washpipe and remove the washpipe holding nut from

the washpipe. B. Remove the washpipe from the washpipe packing nut. Inspect the washpipe for

wear. Replace the washpipe if it shows signs of wear, noted by scoring or wearing away of the surface. Failing to properly grease the washpipe packing during operation will significantly increase the chances of excessive wear of the washpipe.

C. Remove the packing from the washpipe holding nut by turning the nut upside down

and tapping it several times on a piece of soft wood. The washpipe holding ring will break free and allow itself to be removed with the packing attached. Remove and discard the packing from the holding ring.

D. Completely back out the spacer holding screw in the washpipe packing nut and

remove the grease fitting. Using the rubber mallet, tap the top of the nut to break the packing spacers free. Once free, the spacers can be easily removed from the packing nut. Remove and discard the packing from the spacers.



E. Clean and inspect each nut. Replace if wear or thread galling is evident. F. Apply a coating of grease to the ID of the holding nut. Install one (1) piece of

packing into the holding ring. Liberally apply grease to the packing and holding ring and install into holding nut. Insure that the packing facing is correct.

G. Apply a coating of grease to the ID of the lower packing nut. Install one (1) piece of

packing into each packing spacer. Liberally apply grease to each spacer and packing and install into packing nut in the opposite order as removed. Insure that the packing facing is correct. Install and tighten spacer holding screw and grease fitting.

NOTE: Liberally greasing packing prior to installation will significantly increase the operational life of the packing. H. Insert un-slotted end of the washpipe into packing nut. Insert the slotted end of the

washpipe into the holding nut. Install snap ring onto washpipe. I. Install one (1) 0-ring into the washpipe holding ring and liberally apply grease to

hold it in position. J. Install one (1) 0-ring into the lower washpipe packing spacer and liberally apply

grease to hold it in position. The washpipe assembly is now ready for installation onto the top drive. If the assembly is not immediately placed in service, then it should be wrapped in heavy kraft paper or a heavy plastic.



(3) INSPECT MOTOR CASE DRAIN Tools Required: Log sheet (copies of log sheet are available from Bowen Technical

Sales and Service) Parts Required: None PROCEDURE: A. With unit in operation, monitor swivel motor case pressure gauge and case drain

flow meter (on HPU). Pressure should not exceed 60 psi and flow should be less than 15 gpm.

B. Monitor and log pressures and flows every six (6) hours. NOTE: If pressure exceeds the recommended rating, check the motor case drain filter to verify that the filter is not bypassing and causing excessive back pressure in the motors. If flow exceeds recommended values, it is a early indication that the motors are in need of repair and should be scheduled for overhaul at the first opportunity. C. Compare present readings with previous recordings. This is the simplest method to

determine if a trend is developing that may lead to unit failure. (4) CHANGE SWIVEL CASE LUBRICATING OIL (Replace after 150 hours on initial break in and every 1000 hours thereafter.) Tools Required: Wrench, lock wire pliers, lock wire (safety wire), thread sealant,

funnel, 1’ hose, waste oil storage tank, oil transfer pump Parts Required: 10 gallons Bowen Gear Lube 38091 or equivalent



FIGURE 3 Swivel Fill Plug Fill Plug

FIGURE 4 Swivel Drain Plug Case Drain Plug

PROCEDURE: A. Secure operations. B. Position pipe handling package so that easy access is obtained to the case drain plug. C. Secure power unit and engage swivel brake. D. Loosen and remove fill plug (see figure 3). E. Position funnel with drain hose under the drain plug (see figure 4). Insure free end of

hose is secure in the storage tank. NOTE: The swivel case can hold up to ten (10) gallons of oil, allowing the oil to heat up prior to draining will reduce downtime.

DANGER

Do not drain oil after unit has been operating for a d extended period of time. The internal temperature of the case may be as much as thirty (30) degrees higher than

the exterior of the case.



F. Carefully remove the drain plug and allow oil to drain to the waste oil storage tank. Inspect magnetic drain plug for metal debris.

NOTE: If a substantial amount of metallic debris is evident, schedule unit for complete inspection and overhaul at a qualified repair facility. Early correction of a potential problem will prevent failure during critical drilling operations. G. When oil has stopped flowing, apply a light coating of thread sealant to the drain

plug and reinstall. H. Fill swivel case up to the fill plug. Due to the large quantity of oil, a small transfer

pump will significantly speed up the process. I. Reinstall fill plug and safety wire both fill plug and drain plug. (5) INSPECT HOSES AND FITTINGS FOR WEAR AND TIGHTNESS Tools Required: Wrench, flash light Parts Required: None PROCEDURE: A. Visually inspect all hoses for wear. Replace any hose that exhibit excessive abrasive

wear on their exterior cover (as indicated by exposed wire braid). B. Check all fittings for tightness and leaks, replace any fittings which leakage cannot

be stopped by slight re-torquing.



FIGURE 5 Proper Safety Wire Technique

(6) INSPECT FASTENERS Tools Required: Lock wire pliers, diagonal cut pliers, torque wrench, safety wire Parts Required: None PROCEDURE: A. Inspect all fasteners for proper safety wiring. If any safety wire is broken, remove all

loose wire. B. Re-torque bolts that have had safety wire removed. C. Install new safety wire (see figure 5). (7) GREASE UPPER ASSEMBLY BEARING Tools Required: Hand grease gun Parts Required: None PROCEDURE A. Attach grease gun to housing grease fitting and inject ten (10) strokes of grease into

the bearing (see figure 6). B. Remove the grease gun and rotate pipe handling package for five (5) revolutions in

each direction to distribute the grease throughout the bearing assembly.

C. Repeat steps A and B one time.



Grease Points FIGURE 6 Upper Assembly Bearing

(8) GREASE LINK ADAPTER COMPENSATOR Tools Required: Grease gun Parts Required: None PROCEDURE: The link adapter compensator assembly has twelve (12) grease location points that require greasing. Improper greasing can lead to improper link adapter operation which could lead to damage to the load collar and to the drill stem. Wear Pads: A. Attach grease gun to the wear pad and inject two (2)

strokes of grease into the pad. B. Repeat step A for each of the 4 wear pads. NOTE: Do not loosen the Jam nuts on the alignment guides when greasing. Alignment Guides: A. Attach grease gun to the guide and inject two (2) strokes of grease into the guide. B. Repeat step A for each of the 8 guides.

L



(9) ADJUST LINK ADAPTER ALIGNMENT AND SPACING Tools Required: Diagonal cut pliers, lock wire pliers, lock wire, 1” wrench, 9/16" wrench Parts Required: None PROCEDURE: A. Using a thickness gauge, check that the link adapter is approximately 1/8" off of the

load collar (with no pipe in elevator) and visually inspect the gap between the link adapter bore and the drill stem outside diameter to insure that it is uniform along the whole circumference of the drill stem.

If the link adapter is parallel to the drill stem and there is adequate clearance between

the load collar and the link adapter, then no further action is required.

If the link adapter is not parallel to the drill stem, or if there is inadequate clearance between the load collar and the link adapter, then continue with this procedure.

Align Link Adapter to Drill Stem: B. Determine which way the link adapter must move to allow the adapter to run parallel

to the drill stem: Adjustment may have to be forward/backward, side-to-side, or a combination.

C. Once it is determined which way the adapter must be shifted, use the following chart

to properly align the adapter (see figure 7).



FIGURE 7 Link Adapter Compensator

◄ Forward

Adjust A……………moves top of adapter left Adjust B……………moves top of adapter right Adjust C……………moves bottom of adapter left Adjust D……………moves bottom of adapter right Adjust E……………moves top of adapter forward Adjust F……………moves top of adapter backward Adjust G……………moves bottom of adapter forward Adjust H……………moves bottom of adapter backward Proper alignment may require several attempts to get adequate clearances all the way around the drill stem. NOTE: To adjust in any direction, the opposite adjust must be loosened to allow for travel. After clearances are set insure that all adjustment points are tight. Recheck link adapter to load collar gap. If gap is less than 1/8" then proceed with step D.

A B



FIGURE 8 Thread Compensator Tension Nut Jam Nut

Adjust Link Adapter Gap: D. Remove and discard cotter pin from adjustment shaft and loosen jam nut (see figure

8). E. Loosen the adjustment nut until tension is released. Tighten nut until the gap

between the load collar and the link adapter is between 1/8" to ¼”.

NOTE: Do not over tighten the adjustment nut or the link adapter will not seat against the load collar while loaded and severe equipment damage may result F. Install new cotter pin. (10.1) ADJUST LINK TILT CYLINDER CLAMPS Tools Required: Wrench Parts Required: None PROCEDURE: Proper clamp position is required to prevent cylinder overloading and provide even lifting of the elevators when kicking out the drilling links. A. Center link tilt cylinders. B. Visually inspect that clamp pins are in the center of the clamp slots.



C. If pins are not centered, loosen clamp bolts and reposition clamps to place the pins in the center of the slot.

(10.2) INSPECT LINK TILT CYLINDERS Tools Required: Clean dry cloth Parts Required: None PROCEDURE: Clean off cylinder rods and visually inspect the cylinder rod ends for excessive leakage, nicks or pitting. During operations, periodically wipe down the cylinder rods. This will reduce the likelihood that dirt or other debris will bypass the cylinder wiper rings and damage the gland seals. If seal failure is suspected, replace seal or cylinder immediately. If the seal should fail while under load, severe personnel and equipment damage could result. Grease Points FIGURE 9

Link Cylinder Pivots

(10.3) GREASE LINK CYLINDER PIVOTS Tools Required: Grease gun Parts Required: General purpose grease PROCEDURE: A. Attach grease gun to the pivot grease fitting and inject 2 strokes of grease into the

pivot (see figure 9). B. Repeat step A for opposite pivot.



(11) INSPECT BACKUP WRENCH TONG DIES Tools Required: Wrench Parts Required: Tong dies PROCEDURE: A. Position a support under the top drive and lower the top drive until all load is

removed from the support chain. B. Unhook the support chain and slowly raise the top drive until the saver sub is clear

of the backup wrench assembly.

C. Clean and visually inspect the tong dies for excessive wear or other damage (see

figure 10). Replace dies if excessive wear or any damage is noted. D. Lower top drive until saver sub is in proper position for back up wrench to securely

clamp the drill pipe tool joint.

E. Reconnect support chain to backup wrench and raise top drive.

FIGURE 10 Backup Wrench Tong Dies, Top View



FIGURE 11 Torque Cylinders

(12) INSPECT TORQUE CYLINDERS Tools Required: Inspection mirror, clean dry cloth Parts Required: None PROCEDURE: Clean off cylinder rods and visually inspect the cylinder rod ends for excessive leakage (see figure 11). NOTE: A slight coating of oil on the rod is acceptable and is required for proper lubrication of the cylinder rod seals. If seal failure is suspected, replace seal or cylinder immediately. If the seal should fail while under pressure, a potentially hazardous situation could develop.

FIGURE 12 Rig Interface Kit Mounting Bolts



(13) INSPECT RIG INTERFACE KIT MOUNTING BOLTS TOOLS REQUIRED: Torque wrench Parts Required: None PROCEDURE: Using torque wrench, insure all fasteners are at the proper torque for the particular size and thread of bolt (see figure 12). Loose/over torqued fasteners will cause fatigue failure of the clamp bolts and could result in personnel injury or equipment damage in the event they should fail during operations.

FIGURE 13 Track Hanger Assembly

(14.1) INSPECT TRACK HANGER ASSEMBLY Tools Required: None Parts Required: None PROCEDURE: Visually inspect the track hanger assembly (see figure 13) to insure that all devises are tight and that there are no outward signs of possible fatigue or overload failure. Because the hanger assembly is the main load support for the tracks, failure of the hanger could result in severe personnel and equipment damage.



(14.2) CERTIFY CABLE HANGER ASSEMBLY

Tools Required: None Parts Required: None PROCEDURE: Send cable assembly yearly or if wear is evident to a certified testing facility for recertification for proper load capacity.

FIGURE 14 Pivot Arm Connector Pins and Bushings

(15) INSPECT PIVOT ARM CONNECTOR PINS AND BUSHINGS Tools Required: None Parts Required: None PROCEDURE: After rig down, visually inspect pivot arm bushings and connector pins (see figure 14) to insure serviceability. Replace any pins or bushings showing excessive signs of wear.



FIGURE 15 Guide Track Lifting Lug Grease Fitting

16) GREASE LIFTING LUGS Tools Required: Grease gun Parts Required: None PROCEDURE: Position lug for easy access for grease gun and inject one (1) stroke of grease into fitting (see figure 15). Pull lug to insure that it moves freely. Return lug to recessed position. (17) INSPECT CONNECTING PINS Tools Required: None Parts Required: None PROCEDURE: Visually inspect track connecting pins to insure that cotter pins are in place and that no pins are missing. After rig down, visually inspect pins for wear or other possible signs of potential failure. Replace any pins that are difficult to remove or install.



FIGURE 16 APU Filter

(18) CHANGE AUXILIARY POWER UNIT FILL/DRAIN FILTER

Tools Required: Filter wrench, waste oil container Parts Required: One (1) 214588/005 filter element PROCEDURE: A. Secure power unit. B. Position APU valves to Run. C. Place waste oil pan under the filter and remove the filter by turning

counterclockwise (see figure 16). NOTE: Do not drain oil into the pollution containment pan of the power unit D. Apply a light coating of oil onto the seal of the replacement filter and carefully screw onto the filter head. Spin element on hand tight and then rotate an additional quarter turn. NOTE: Do not over torque the filter canister as damage to the filter could result. E. Reposition valves (APU) to desired configuration.



FIGURE 17 Fuel Level Sight Tube and Drain Valve Isolation Valve Drain Valve

(19) REPLACE FUEL LEVEL SIGHT TUBE Tools Required: Flat tip screwdriver Parts Required: PN, 1/2" hose clamps (2) PROCEDURE: A. Drain fuel tank to a level below the top tube connection of the sight tube (see figure

17). B. Close ball valve at bottom of sight tube. C. Loosen and remove the two hose clamps. D. Remove the tubing from the tank. E. Using the old tubing, measure and cut the new tubing to the proper length. F. Install the two (2) new hose clamps onto the new tubing section and install onto the

fuel tank. Tighten the hose clamps and open isolation valve. NOTE: Do not over tighten the hose clamps as they may cause premature failure of the clear tubing. G. Refill fuel tank to the proper level.



(20) DRAIN CONDENSATE FROM FUEL TANK Tools Required: Waste fuel receptacle, combination wrench, thread sealant Parts Required: None PROCEDURE: A. Insure drain valve is closed and remove valve plug B. Position waste pan under drain valve. C. Slowly open drain valve and drain condensate for tank. D. Once only fuel drains from tank, close ball valve. E. Apply thread sealant to valve

plug and install plug. FIGURE 18 Gearbox Oil Level Plug Oil Level Plug

(21) INSPECT GEARBOX OIL LEVEL TOOLS REQUIRED: 1-1/4" box wrench, 5/16" Allen wrench PARTS REQUIRED: Gear oil (SAE 90 or equivalent) PROCEDURE: A. Secure engine.

CAUTION Do not check oil level when unit has been in prolonged operation. Wait approximately

thirty (30) to sixty (60) minutes for oil to cool B. Pull side fill plug located approximately four (4) inches from the bottom of the

gearbox (see figure 18).



FIGURE 19 Gearbox Breather Plug Fill Plug

C. Visually inspect that oil drains from the port. D. If no oil drains from the gearbox, remove breather plug on top of gearbox (see figure

19) and then fill the gearbox until oil begins to drain from the port. E. Reinstall both side plug and breather plug. Change Gearbox Oil: Tools Required: 1-1/4" box wrench, 5/16" Allen wrench, waste oil pan Parts Required: Gear oil (SAE 90 or equivalent) PROCEDURE: A. Secure engine.

CAUTION Do not check oil level when unit has been in prolonged operation. Wait approximately

thirty (30) to sixty (60) minutes for oil to cool

B. Position waste oil container under gearbox. NOTE: The gearbox holds approximately 2 gallons of oil. Do not drain oil into the pollution containment pan on the power unit. C. Remove breather plug from top of gearbox (see figure 18).



FIGURE 20 High Pressure Filter Indicator

Indicator

Drain Plug

D. Remove drain plug from bottom of gearbox and drain oil. Inspect plug and oil for metallic particles or other debris. If metallic debris is visible, schedule the gearbox for complete disassembly and overhaul as soon as possible as failure of the pump drive is imminent.

E. Remove the side fill plug and install the bottom drain plug (see figure 18). F. Fill gearbox until oil begins to drain out of the side port. Install both side plug and

breather plug. (22) INSPECT FILTER INDICATORS Tools Required: None Parts Required: None PROCEDURE: The high pressure filters each have flow indicators mounted on the filter heads (see figure 20). Inspect each indicator when drilling ahead to insure that each indicator is in the green range.



(23, 24, 25) REPLACE FILTERS Tools Required: 1-1/4" boxed end wrench, 9/16" boxed end wrench, 0-300 ft lb torque wrench, filter wrench. Parts Required: Filter elements: (8) (214900)/005, (2) 212158/005, (4) 214898/010 PROCEDURE: Replace High Pressure Filters (23): A. Secure power unit. B. Position waste oil pan under filter bowl. C. Shut pump suction valves and top drive supply hose isolation valves. D. Open manifold drain valves and relieve the pressure in the filter assemblies (see

figure 20). E. Loosen and remove the filter drain plug. F. Loosen and remove the canister bowl. G. Discard the bowl 0-ring and backup ring. H. Remove filter element by rotating counter clockwise and discard in an approved

container. I. Install new filter element and tighten hand tight. NOTE: Do not over torque the filter element as operations can cause element to swell and could cause premature failure. J. Install new 0-ring and backup onto filter canister bowl. K. Carefully install filter bowl and tighten hand tight. L. Torque filter howl to 100 to 150 ft lb and install drain plug. M. Close manifold drain valves and open the four suction and four top drive supply

valves. N. Start system and check for leaks. NOTE: Visually inspect filters during operation until maximum system pressure is reached during operation. The 0-ring may hold under a lower pressure but fail when subjected to higher pressures.



FIGURE 21 Return Filters

Replace Return Filters (24): A. Secure power unit. B. Position waste oil pan under filter bowl. C. Disconnect the case drain hose at the power unit. D. Remove filters by turning counterclockwise (see figure 21). NOTE: Do not drain oil into the pollution containment pan of the power unit. E. Apply a light coating of oil onto the seal of the replacement filters and screw onto

the filter heads. Spin on hand tight and then rotate an additional quarter turn. NOTE: Do not over torque the filter canister as damage to the filter could result. F. Reconnect the case drain line at the power unit.

CAUTION

Do not operate the top drive without verifying that the case drain line is connected, severe equipment damage could result.

G. Start system and check for leaks.



Replace Charge Pump Filters (25): A. Secure power unit. B. Position waste oil pan under hydraulic pump. C. Shut pump suction valves and top drive supply hose isolation valves. D. Remove filters by turning counterclockwise. NOTE: Do not drain oil into the pollution containment pan of the power unit. E. Apply a light coating of oil onto the seal of the replacement filters and screw onto

the filter heads. Spin on hand tight and then rotate an additional quarter turn. NOTE: Do not over torque the filter canister as damage to the filter could result. F. Open pump suction valves and supply hose isolation valves. G. Start system and check for leaks. (26) STEAM CLEAN POWER UNIT Tools Required: Steam cleaner, approved solvent, waste oil container Parts Required: None PROCEDURE: A. Insure that all pan drain plugs are in place. B. Position power unit so that pan can be drained into a waste oil container. C. Using fresh water, thoroughly clean all components to remove all oil, salt scale and

dirt. NOTE: Do not spray directly at junction box or driller’s remote console as damage to electrical components may result

Document name NOV Service Centers Revision 02 Page 1

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suitable lifting

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