MH-S-MF70,80 M M a a s s s s e e y y H H a a r r r r i i s s M M a a s s s s e e y y F F e e r r g g u u s s o o n n Service Manual MF70 & MF80 Tractor, Loader & backhoe THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF MASSEY HARRIS MASSEY FERGUSON OR IT’S SUCCESSORS. MASSEY HARRIS MASSEY FERGUSON AND IT’S SUCCESSORS ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL. TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS. Service Manual
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M Maasssseeyy HHaarrrriiss MMaasssseeyy ......MF 70,AND MF 80 - BACKHOE LOADER PART 1 - General Service Information and Recommendations PART 2 - Engine PART 3 ~ Torque Converter and
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THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF MASSEY HARRIS MASSEY FERGUSON OR IT’S SUCCESSORS. MASSEY HARRIS MASSEY FERGUSON AND IT’S SUCCESSORS
ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.
TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.
A4.318 ENGINE ..................................................................................... A
A6.3541 ENGINE .................................................................................... B
INTRODUCTION
This part of the Manual consists of two sections of service information for the A4.318 and A6.3541 Engines installed in MF 70 and MF 80 Backhoe Loaders respectively.
Thoroughly clean engine before disassembling it, or removing any component parts of fuel system. Also, cap or otherwise cover all fuel openings to prevent dirt from entering fuel system. Cleanliness is very important and cannot be overemphasized.
Whenever fuel system components are removed, or fuel line connections are disturbed, make sure to bleed fuel system of air before attempting to start engine.
Always disconnect batteries when servicing machine.
SECTION A - A4.318 ENGINE
INDEX
PAGE PAGE
SPECIFICATIONS ............................ 2 Crankshaft and Main Bearings ............. 23 General Specifications ..................... 2 Crankshaft End-Play ..................... 24 Torque Tension Specifications .............. 2 Regrinding Crankshaft ................... 24
Rear Crankshaft Oil Seal ................... 26 SERVICE INFORMATION ..................... 3 Engine Flywheel .......................... 27
Engine Overhaul Specifications. .. . . . . .. . . .. 3 Lubrication System Specifications .......... 5 LUBRICATION SySTEM ...................... 28 Fuel System Specifications ................. 5 Engine Oil ................................ 28 Cooling System Specifications .............. 6 Oil Pressure .............................. 28 Introduction ............................... 7 Oil Pan ................................... 28 Engine Serial Number ..................... 7 Lubricating Oil Filter ....................... 29 Service Tools ............................. 7 Oil Pump ................................. 29
Bore ....................................................................................... 4.5 inches Stroke ....................................................................................... 5 incHes Number of Cylinders ................................................................................. 4 Firing Order ................................................................................... 1-3-4-2 Total Piston Displacement ............................................................. 318 cubic inches Compression Ratio ........................................................................... 1 7.5 to 1 Combustion System .................................................................... Direct injection Engine Flywheel Horsepower* .......................................................... 84 at 2000 rpm Maximum Engine Horsepower** ....................................................... 108 at 2400 rpm Maximum Engine Torque ............................................................. 242 at 1300 rpm Low Idle Speed ........................................................................... 750-800 rpm Rated Engine Speed ......................................................................... 2000 rpm Maximum Engine Speed (No-Load) ..................................................... 2170-2200 rpm Valve Tappet Clearance (Intake and Exhaust) ....................... 0.010 inch "hot" - 0.012 inch "cold"
*Net hp at flywheel of standard engine operating under ambient conditions of 85° F. and 29.38" Hg. equipped with fan, air cleaner, muffler, water, oil and fuel injection pumps, generator (or alternator) and air compressor not charging.
**Maximum gross BHP of engine under the conditions defined in SAE Engine test code J816 (a) 1963.
, 6. Remove camshaft complete with gear and thrust washer from cylinder block, Fig. 29. Be careful not to damage bearing journals or cam lobes when withdrawing camshaft.
INSPECTING CAMSHAFT
1. Thoroughly clean camshaft and inspect bearing journals and cam lobes for wear or damage. If journals are scored, nicked or discolored by heat, or if lobes are pitted or rough, camshaft should be replaced.
2. Measure diameter of bearing journals for wear and out-of-round. If journal diameters or camshaft lobes are badly worn, camshaft should be replaced.
3. Measure camshaft bearing bores in cylinder block. Then compare each bore diameter to its mating journal diameter. Correct clearance between Nos. 1 and 2 camshaft bearing journals and their bores is 0.002-0.005 inch. No.3 camshaft journal should have 0.004-0.007 inch clearance.
Fig. 30 - Installing Camshaft Thrust Plate
Fig. 31 - T.D.C. Timing Mark Aligned with Indicator
4. With camshaft gear and thrust plate installed onto camshaft, use a feeler gauge and measure clearance on both sides of thrust plate. Remove camshaft gear and install a new thrust plate, if clearance exceeds 0.018 inch. Fig. 30 shows installing a new thrust plate with camshaft installed in place.
During overhaul, tappets should be removed and given an inspection. If any tappets have uneven wear on cam follower face, it is an indication that tappet has not been rotating in its bore. Replace tappets with badly worn faces. New tappets should be installed whenever camshaft is replaced.
Do not attempt to reclaim tappets by regrinding faces.
INSTALLING CAMSHAFT
To install camshaft lubricate journals and lobes with oil and proceed as follows:
1. With engine upside down or with tappets supported in their fully raised position, carefully install camshaft (with gear attached to it) into cylinder block. See Fig. 29.
2. Install capscrews and lockwashers securing thrust plate to cylinder block.
3. Install engine idler gear, making sure all timing gear marks are aligned.
4. Install push rods and rocker arm shaft assembly. Adjust valve clearances.
5. Install fuel pump, timing gear cover and complete reassembly of engine.
CHECKING VALVE TIMING
To check valve timing of engine, proceed as follows:
1. Rotate crankshaft in normal direction of engine rotation (clockwise) until both rocker arms of No.4 cylinder are "rocking" (exhaust valve closing and intake valve opening).
NOTE: At this point No. 1 piston will be at approximately T.D. C. on compression stroke.
2. With crankshaft positioned with No. 1 cylinder at T.D.C. on compression stroke, adjust INTAKE VALVE CLEARANCE of No.1 cylinder to 0.020 inch.
ENGINE DATA AND PROCEDURES FOR MF 80 .............................. 2 Specifications ........................................................... 2
General Specifications ................................................. 2 Lubrication System Specifications ...................................... 2 Fuel and Air System Specifications ..................................... 3 Cooling System Specifications .......................................... 3
Engine Component Identification and Servicing ............................ 4 Engine Removal and Installation .......................................... 6 Radiator Removal and Installation ........................................ 8 Fuel and Air System Servicing ........................................... 9
Fuel Filter Element Replacement ....................................... 9 Air-Bleeding Fuel System .............................................. 10
ENGINE SERVICING INFORMATION .............. Refer to Publication within this Section titled "Workshop Manual for 6.372, 6.3542, T6.354
and 6.354 Engines"
INTRODUCTION
This Section consists of two portions of service information concerning the A6.3541 EnginefortheMF80. FOR COMPLETE INFORMATION BOTH PORTIONS MUSTBE USED TOGETHER.
The first portion, "Engine Data and Procedures for MF 80", contains information specific to the MF 80.
The second portion contains a separate engine publication titled "Workshop Manual for 6.372, 6.3542, T6.354 and 6.354 Engines". This publication is a basic service manual covering several different models of engines. Section P, "Turbocharger", does not apply to this unit and has been omitted. The information for Section Q, "Alternator and Starter Motor", is included in Part 8 - Electrical System.
Right and left-hand sides of engine and machine are referred to as viewed from rear of flywheel. Direction of engine rotation is viewed from crankshaft pulley end of engine.
For torque converter to flywheel attachment information refer to Part 3.
Fig. 1 - Left Side View of A6.3541 Engine Fig. 2 - Right Side View of A6.3541 Engine
Lubrication for the timing gears is taken from the oil passages connecting the pressure rail with the front main bearing and auxiliary drive. The two idler gear hubs intersect these drillings and oil is passed through the hubs to radial drillings in the idler gears to lubricate the teeth of the gear train.
The auxiliary drive shaft bearings are lubricated by a drilling from the pressure rail to the front auxiliary drive shaft bearing. The oil then passes around a groove in the bearing journal and through a further drilling along the outer side of the auxiliary drive housing to the rear auxiliary drive shaft bearing. Lubricant for the upper fuel pump drive bearing is also taken from this drilling. Also connected with the outer drilling is a small spray tube, which directs oil onto the wormwheel and worm gear.
SUMP
An exploded view of the lubricating oil sump and pump is shown in Fig. K.2.
To Remove the Sump Lower the sump by releasing all flange set
screws.
To Replace the Sump I. Screw two guide studs In the cylinder block.
one on each side. Place the sump in position and insert the screws. Remove the guide studs .
.I. Tighten the screws evenly to a torque 9110 Ihf ft (1.211.4 kgf m).
OIL PUMP
To Remove the Oil Pump and Oil Pump Delivery Housing
I. Remove the sump and strainer. .., Remove the two setscrews securing the oi 1
delivery housing to the cylinder block. 3. Unscrew the lubricating oil pump locating
setscrew situated on the outside of the cylinder block.
4. The oil pump and oil delivery housing can now be removed (Fig. K.3).
5. The two parts of this assembly are connected by a short pipe which is a push fit in each compartment. A rubber '0' ring is recessed into the bore of both the lubricating oil pump and the delivery housing and to separate, Dull the components apart.
Fig. K.3. Lubricating Oil Pump Removal.
Fig. K.4. Checking Clearance between Inner and Outer Rotor.
1. Perform recommended tests before attempting repair.
2. Prior to removing ANY hydraulic component, measures must be taken to prevent dirt and dust from entering system.
CAUTION: Observe safety precautions to avoid possible injury to personnel. Before attempting to remove (or disconnect) a hydraulic com-ponent, make certain that hydraulic pressure is relieved. The bucket should be flat on the ground and control levers operated back and forth several times with engine NOT RUNNING.
3. If system oil is to be drained and reused, be sure drain containers are clean and are covered when not in use.
Inspection Recommendations
These procedures apply generally to all assemblies and components covered within this Part. They are in addition to any specific instructions.
1. Clean all assemblies and components prior to removal.
2. Use extreme care to prevent dirt from entering system.
3. Clean all metal parts with a suitable fluid and air dry prior to reassembly.
4. Replace ALL seals, gaskets and "O"-rings with new items.
5. Inspect all parts for visual evidence of wear, or damage. In many instances it will require the judgment of the serviceman to determine necessity of replacing parts due to wear ... this may be done by comparing tolerances given for NEW parts with dimensions of SUSPECTED "worn" parts.
Hydraulic System
Brake and differential lock share the same hydraulic systems as illustrated in Fig. 1. If differential lock is NOT installed, brake system is as illustrated in Fig. 2.
Both circuits use the same oil reservoir, filter and hydraulic pump. However, pressures within these circuits differ.
BRAKE CIRCUIT
This is an hydraulic power assist circuit ... controlled by an open-center (spool) valve. Flow is supplied to brake valve by a flow divided pump. When brake valve is actuated (by depressing pedals), oil is supplied to brake pistons located in left and/or right rear axle assemblies. Pressure in circuit is proportional to applied pedal effort. An equalizing valve engages when both pedals are depressed, and has an output at lowest pressure determined by either left or right brake spool.
Manual braking is accomplished when engine is "off', by pumping pedals.
Parking brake service information and procedures are contained in Part 4.
TESTING SySTEM ....................................................... ·· 13 Checking System Pressures .............................................. 13 Testing Pump Efficiency and Flow Control Setting ......................... 13
IMPORTANT INSPECTION RECOMMENDATIONS
The "common sense" service and inspection procedures are outlined below and apply generally to all assemblies (and components) covered within this Part. These procedures are not repeated under the servicing of individual parts and are in addition to any given specific instructions.
Clean all assemblies (and components) prior to removal.
Take all necessary precautions to prevent dirt from entering system.
Clean all metal parts prior to reassembly (using a suitable fluid) and blow dry with compressed air.
Inspect all parts for evidence of wear or damage (in many instances, it will require the judgment of the serviceman to determine necessity for replacement of parts due to wear).
It is good service practice to replace all seals, gaskets and "O"-rings with new items.
GENERAL SERVICE INFORMATION
Perform appropriate tests under "Testing System" before attempting repair.
Prior to removing any hydraulic component, necessary measures must be taken to prevent dirt and dust from entering system.
CAUTION: Observe safety precautions to avoid possible injury to personnel. Before attempting to remove or disconnect any hydraulic component. make certain that hydraulic pressure is relieved. The bucket should be flat on the ground and control levers operated back and forth several times with engine not running. If system oil is to be drained and reused. be sure drain containers are clean and are covered when not in use.
SERVICE INFORMATION ......................................................................... . 2 Inspection Recommendations .................................................................. . 2 Hydraulic System - See "Changes Affecting Service Instructions" ............................... . 2
RESERVOIR SERVICING ......................................................................... . 7 o.