Services, Wärtsilä Finland Oy Engine section Engine type Ref. Date Issue Document No. Page 18 Lubricating oil system W20 WFI–S 22-Apr-2010 02 2018Q013 1(2)+12 Wärtsilä Finland Oy P.O. Box 252 (Tarhaajantie 2) Telecop. +358 10 709 1847 Tel. +358 10 709 0000 Business ID 0773744-3 Services, Vaasa FIN-65101 Vaasa, Finland Telecop. +358 10 709 1380 Registered Office: Vaasa Wärtsilä Finland Oy P.O. Box 50 (Stålarminkatu 45) Telecop. +358 10 709 3279 Tel. +358 10 709 0000 Services, Turku FIN-20811 Turku, Finland Telecop. +358 10 709 3410 OPERATING INSTRUCTION Instructions for automatic lubricating oil filters Engine type This bulletin concerns a limited number of WÄRTSILÄ ® 20 engines were the Parker PTL12 automatic lubricating oil filter has been replaced with a Boll & Kirch 6.48 filter, see Service Letter 2018S040: Retrofitting of automatic lubricating oil filters on WÄRTSILÄ ® 20 engines. Recommendation Update the engine documentation with the enclosed pages: x Replace chapter 18L-200649-00 or 18L-200617-00 for Parker PTL12 with 18N-200717-00 for Boll & Kirch 6.48 in the engine instruction manual. x Replace Spare Part List 20-471-0017 or 20-471-0021 for Parker PTL12 with 20-471-0018 for Boll & Kirch 6.48 in the engine spare part catalogue. Letter distribution Wärtsilä Services Network and operators/owners of engines concerned. Letter validity Until further notice. Enclosures x Chapter 18N-200717-00, 4 pages x Spare Part List 471-0018, edition B, 8 pages
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Services, Wärtsilä Finland Oy
Engine section Engine type Ref. Date Issue Document No. Page 18 Lubricating oil system W20 WFI–S 22-Apr-2010 02 2018Q013 1(2)+12
Wärtsilä Finland Oy P.O. Box 252 (Tarhaajantie 2) Telecop. +358 10 709 1847 Tel. +358 10 709 0000 Business ID 0773744-3 Services, Vaasa FIN-65101 Vaasa, Finland Telecop. +358 10 709 1380 Registered Office: Vaasa
Wärtsilä Finland Oy P.O. Box 50 (Stålarminkatu 45) Telecop. +358 10 709 3279 Tel. +358 10 709 0000 Services, Turku FIN-20811 Turku, Finland Telecop. +358 10 709 3410
OPERATING INSTRUCTION
Instructions for automatic lubricating oil filters Engine type This bulletin concerns a limited number of WÄRTSILÄ® 20 engines were the
Parker PTL12 automatic lubricating oil filter has been replaced with a Boll & Kirch 6.48 filter, see Service Letter 2018S040: Retrofitting of automatic lubricating oil filters on WÄRTSILÄ® 20 engines.
Recommendation Update the engine documentation with the enclosed pages:
Replace chapter 18L-200649-00 or 18L-200617-00 for Parker PTL12 with 18N-200717-00 for Boll & Kirch 6.48 in the engine instruction manual.
Replace Spare Part List 20-471-0017 or 20-471-0021 for Parker PTL12 with 20-471-0018 for Boll & Kirch 6.48 in the engine spare part catalogue.
Letter distribution Wärtsilä Services Network and operators/owners of engines concerned.
Letter validity Until further notice.
Enclosures Chapter 18N-200717-00, 4 pages
Spare Part List 471-0018, edition B, 8 pages
Services, Wärtsilä Finland Oy Operating Instruction
Issue Document No. Page 02 2018Q013 2(2)+12
2010 Wärtsilä Finland Oy – All rights reserved
No part of this publication may be reproduced or copied in any form or by any means (electronic, mechanical, graphic, photocopying, recording, taping or other information retrieval systems) without the prior written permission of the copyright holder. Wärtsilä Finland Oy makes no representation, warranty (express or implied) in this publication and assumes no responsibility for the correctness, errors or omissions for information contained herein. Information in this publication is subject to change without notice.
Unless otherwise expressly set forth, no recommendation contained in this document is to be construed as provided due to a defect in the engine, but merely as an improvement of the engine and/or the maintenance procedures relating thereto. Any actions by the owner/operator as a result of the recommendations are not covered under any warranty provided by Wärtsilä and such actions will thus be at the owners/operators own cost and expense.
NO LIABILITY WHETHER DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL, IS ASSUMED WITH RESPECT TO THE INFORMATION CONTAINED HEREIN. THIS PUBLICATION IS CONFIDENTIAL AND INTENDED FOR INFORMATION PURPOSES ONLY.
18N.1 Lubricating oil automatic filter
18N.1.1 Description
The filter is full flow filter, i.e. the whole oil flow passes through thefilter.
The arrows in Fig 18-1 show the flow through the filter. At first, theoil flows through the inlet flange and turbine (1) to the bottom end ofthe filter candles (2); a partial stream of about 50 % is passed throughthe central connection tube (3) to the top end of the filter candles. Thismeans that the oil flows through the filter candles at both ends frominside outwards and most of the dirt particles are retained in the insideof the candles. The oil filtered in this way now passes through the safetyfilter (4) to the filter outlet. The flow energy drives the turbine (1) installed in the inlet flange.The high speed of the turbine is reduced by the worm gear unit (5) andgear (6) to the lower speed required for turning the flushing arms (16,17). The individual filter candles are now connected successively to theflushing line by means of continuosly rotating flushing arms (16, 17)and the flushing bush (7). Flow during back-flushing, from outside of the candles to the insidethrough flushing arms in to the flushing line. The resultant turbulentstream in the longitudial direction of the filter candles (cross-flow backflushing) and the counter flow back-flushing through the filter candlesresult in a particularly effective and lasting back-flushing action. The lower pressure in the interior of the filter candles during theback-flushing operation (connected with the centrifugal filter) and thehigher pressure (operating pressure) outside the filter candles producea counter-flow through the mesh from the clean filter side through thedirty filter side to the centrifugal filter. Should for any reason the filter candles no longer be adequatelycleaned, the overflow valves (10) are opened at a differential pressureof 2 bar upwards and the oil is only filtered through the safety filter (4). However, before this situation arises, the installed LO differentialpressure switch PDS243 emits an alarm, at 1.5 bar differential pres-sure, to the alarm system. At the same time the visual differentialpressure indicator (located after the LO-filter) becomes red. The causemust now be localised and remedied. The filter may only be operated in this emergency condition for a shorttime (opened overflow valves and differential pressure alarm). Pro-longed operation in this mode can result in damage to downstreamcomponents. The overflow valves are closed under normal operating conditions,even during start-up at lower fluid temperatures.
Appendix 18N Automatic filter 20-200717
18K - 2 BOLL & KIRCH 6.48
18N.1.2 Maintenance
Even with automatic filters inspections and maintenance must beperformed at regular intervals. It is extremely important to remember that in spite of constantback-flushing the mesh may become clogged over the course of time,depending on the quality of the oil. In order to maintain trouble-free operation, the following aspects areto be observed during maintenance:
1 Check filter and connections for leakages.
2 Conduct visual inspection of all filter candles once a year.
Note! Should a higher differential pressure occur beforehand, all the filtercandles (2) and the safety filter (4) must be checked and, if neces-sary, cleaned or the candles are to be replaced by new ones.
A highly contaminated safety filter is a sign of prolonged operation withdefective or clogged filter candles and thus (from a differential pressureof 2 bar upwards) opened overflow valves. It is imperative to check these components.
3 Check the ease of movement of the worm gear unit (5), theturbine (1) including gear (6) with flushing arms (16, 17).To do this the cover (13) and the complete filter element pack mustbe removed.
4 Replace the O-rings as and when required. It is advisable toreplace all static seals during an overhaul and when opened.
18N.1.2.1 Filter candle inspection and cleaning1 Drain the filter , open the screw plug (11) then open the screw
plug (8). Do not refill the system with drained oil because itis very dirty.
2 Remove the cover (13) by opening the nuts.
3 Pull the entire filter element including flushing arms (16, 17)and gear (6) out of the housing.
Note! Make sure that the exposed gear (6) is not damaged.
4 Remove the topp flushing arm (17) and the upper cover plate(9)
5 Remove the end plate (14) by opening the screws.
6 The filter candles (2) and safety filter (4) can now be removed.
7 Place the filter candles and the safety filter in a suitablecleaner or diesel oil, max. soaking time 24 hours.
20-200717 Automatic filter Appendix 18N
BOLL & KIRCH 6.48 18K - 3
8 After immersing clean them from the outside inwards usinghigh pressure.It must be ensured that the filter candles are cleaned at a pressure ofmax. 60 bar and at a minimum distance of cleaning nozzle of 20 cm.Otherwise, damage to the mesh is possible. To get a optimal cleaning effect it is recommended to use special high-pressure cleaning unit (Part No. 471345) and cleaner (Part No.471346). During cleaning the candles must be held so that the dirt is able todrain unhindered.
9 Clean the parts and check the overflow valves. Replace wornparts if necessary.
10 Mount the safety filter (4) and the end plate (14). Note theposition of the guiding pin.
11 Before the filter candles are installed, they must be visuallyinspected and damaged candles replaced with new ones.
Note! Defective filter candles must not be used again.
12 Mount the filter candles in position by chamfered end towardsthe bottom flushing arm.Before installation of the entire filter element, the ease of motion ofthe flushing facility must be checked. The bottom flushing arm (16) must not grind against the bottomfilter plate (15) .
13 Push the entire filter element into the housing. By slightlyturning the coupling pipe (12), the gear (6) is forced into the drivepinion of the gear unit (5).
Re-assemble the filter in the reverse sequence to that described above.