1994/09/01 Caterpillar

New Plunger In Fuel Pressure Regulating Valve {1250}

Usage:

3508 (23Z, 70Z),
3512 (24Z, 67Z),
3516 (25Z, 73Z, 4XF, 5SJ) Generator Set;
3508 (96Y, 68Z),
3512 (49Y, 65Z, 1LM),
3516 (27Z, 71Z) Industrial;
3508 (6TJ),
3516 (9KF) Locomotive;
3508 (96Y, 69Z),
3512 (50Y, 66Z),
3516 (5MJ, 29Z, 72Z, 4MJ) Marine;
3508 (97Y),
3512 (51Y),
3516 (28Z) Vehicular Engines

Description of Change: If 3500 Commercial Engines are experiencing low fuel pressure, hard starting or reduced power, check the fuel pressure regulating plunger. Scoring or scuffing of this plunger or fuel manifold housing can cause the pressure regulating valve to operate incorrectly. For added reliabilty, a new plunger has replaced the former plunger. The new plunger is heat treated and will resist scuffing inside the fuel manifold. If scoring of the plunger or manifold housing is present, replace both parts.

Typical location of fuel pressure regulating valve and 114-5477 Plunger.

Adaptable To: The new 114-5477 Plunger is a direct replacement for the former 1W-7535 Plunger. The former plunger is canceled. The new 114-5477 Plunger is in effect as shown in the chart.

Caterpillar Information System:

1994/09/01 New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}

1994/09/01 New Gears And Pipe Plugs In Auxiliary Drive Group {1150,1165}

1994/09/01 New Gasket Provides Improved Sealing Between Air Compressor And Drive {1803}

1994/09/01 New PSG Governor With Pneumatic Air Head Control Available {1264}

1994/09/01 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance {1251}

1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems {1105}

1994/09/01 Different Valves And Valve Seats Used In Remanufactured Cylinder Head Groups {1103,1105}

1994/09/01 Longer Studs And Spacers Used To Retain Exhaust Manifolds {1059}

1994/09/01 New Turbocharger Increases G3412 Engine Performance {1052}

1994/09/01 New Fuel Priming Pump Assembly Used In Fuel Priming Pump Group {1258}

1994/09/01 Improved Fuel Pump Bonnet Seals Have Better Heat Resistance {1251}

1994/09/01 Tachometer Adjustment To Read Correct Engine RPM; Instrument Background Lighting {7451,7462}

1994/09/01 New Gasket Used In The Water Lines Group {1380}

1994/09/01 Improved Knock (Detonation) Sensor Group Replaces Detonation Sensor {1559}

1994/09/01 New Operation And Maintenance Videos Available {0374}

1994/09/01 Turbocharger Turbine Nozzle Reusability Information {1052}

1994/09/01 Use Thread Lock On Bolts That Fasten Aftercooler Housing To Cylinder Block {1063}

1994/09/01 New Rear Camshaft Segments With Stronger Camshaft Flange Used {1210}

1994/09/01 Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}

1994/09/01 Different Emergency Stop Push Buttons for Electronic Modular Control Panel II (EMCP II) {4490,4450}

1994/10/01 New Rear Crankshaft Seal Groups Available {1161}

1994/10/01 Fuel Priming Pump Can Be Installed On Either Left Or Right Side Service Fuel Filter Groups {1258}

1994/10/01 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material {1205}

1994/10/01 Adjustment Of Air/Fuel Ratio Control Setting {1278}