1999/07/01 Caterpillar


New Fuel Priming Pump Assemblies Used {1258}

Usage:


3508 (95Y, 68Z),
3512 (1LM, 49Y, 65Z),
3516 (27Z, 71Z) Industrial Engines;
3508 (6TJ),
3508B (5PS),
3512 (2WK),
3512B (3ZW),
3516 (9KF) Locomotive Engines;
3508 (96Y, 69Z),
3508 With EUI (3PS),
3508B (2BM, 7SM, 1TW),
3512 (50Y, 66Z),
3512 With EUI (3RS),
3512B (7HM, 4TN, 2GW),
3516 (29Z, 72Z),
3516 With EUI (3SS),
3516B (8CN, 8KN, 3CW) Marine Engines;
3508 With EUI (3TS),
3508B (3DM, 3DW),
3512 With EUI (3WS),
3512B (8EM, 1PW),
3516 With EUI (3XS),
3516B (9AN, 2FW) Marine Auxiliary Engines;
3508 (23Z, 70Z),
3508 With EUI (5XM, 3LS),
3508B (4GM, 6PN, 2HW),
3512 (24Z, 67Z),
3512 With EUI (6PM, 3MS),
3512B (8RM, 6WN, 4AW),
3516 (4XF, 5SJ, 25Z, 73Z),
3516 With EUI (7KM, 3NS),
3516B (6HN, 7RN, 1NW) Generator Set Engines;
3508 (97Y),
3512 (51Y),
3516 (28Z) Vehicular Engines

Description of Change: New fuel priming pump assemblies are used on these 3500 Commercial Engines. The new pumps have several design changes which provide:

* An improved knob to rod joint.
* Improved torque retention.
* Improved resistance to vibration induced wear.

These changes will result in the new fuel priming pump assemblies providing increased service life.

Adaptable To: The new 162-3904 and 162-3906 Fuel Priming Pump Assemblies are direct replacements for the 2W-2604 and 2W-2606 Fuel Priming Pump Assemblies respectively on these 3500 Commercial Engines.

Caterpillar Information System:

1999/07/01 New Basic Fuel Transfer Pump Group Includes New Outer Lip Type Seal {1256}
1999/07/01 New Position Sensor Group (Throttle) {1913}
1999/07/01 New Stronger Bolts and Washers Help Prevent Oil Leaks At Rear Power Take Off (RPTO) Flywheel Housing To Block Joint {1157}
1999/06/01 New Voltage Sensing Transformer Improves Reliability {4477}
1999/06/01 Rain Protection Shield Assemblies Available For Engine Junction Box And Engine Supervisory System (ESS) Control Panel {7426,7490,7555}
1999/06/01 Replacement Frequency Transmitters Must Be Reconfigured For Marine Monitoring System (MMS) {7400}
1999/06/01 Postlube Feature Added To Marine Monitoring System (MMS) {7400,1319}
1999/06/01 Change The Marine Monitoring System (MMS) Default Setting To Prevent Filling The Hard Drive {7400}
1999/06/01 Improved Oil Level Contactor Groups {1326,7450}
1999/06/01 New Transformer Group Has New Transformer Assembly For Improved Reliability {1561}
1999/06/01 New Breather Group And Additional Fumes Disposal Group Used {1317}
1999/06/01 Suggested Ways To Increase 3500 Unit Injector Service Life {1290}
1999/07/01 Be Sure The Cylinder Head Bore For the Unit Injector Is Clean When the Unit Injector Is Replaced {1290}
1999/07/01 O-Ring Seals Included On Terminal Assembly For The Electronic Ignition System (EIS) Transformer Group {1561}
1999/07/01 "Guidelines For 3600 Heavy Fuel Oil (HFO) Engines" Has Been Revised {0374,1000}
1999/07/01 Operation And Maintenance Manual For 3600 Diesel Marine Monitoring System Has Been Revised {0374,7490}
1999/07/01 Worldwide Listing Of ABB Turbocharger Service Stations {1052}
1999/07/01 High Performance Aftercooler (HPAC) Parts Kits Available {1063}
1999/07/01 New Piston Assembly Used {1214}
1999/07/01 New Connecting Rod Bolt Tightening Procedure {1218}
1999/07/01 Follow Fuel Changeover Procedure Before Synchronizing Fuel Injectors On Heavy Fuel Oil (HFO) Engines {1250,1274,1280,0374}
1999/07/01 Risks Of Extended Oil Change Interval Practices {1300}
1999/07/01 Centrifugal Oil Filter Group Revised To Allow Higher Operating Pressures {1328}
1999/07/01 A New Control Assembly (XYCOM Monitor) Is Used In The Marine Monitoring System (MMS); Special Instruction With Procedure For Replacing The Former Control Assembly With The New Control Assembly Available {1901}
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