Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems {1105}
Usage:
3406, 3408, And 3412 Commercial Engines
Description of Change: Remanufactured cylinder heads will be assembled with chrome plated valve stems. This change will provide longer valve life in severe applications.
Adaptable To: The new chrome plated part numbers are 108-5902 Intake Valve and 106-1111 Exhaust Valve. They will be used on all remanufactured 3406. 3408 and 3412 Cylinder Heads with date code of February 1994 (NMDR) or later.
NOTE: All Remanufactured 3400 Cylinder Heads with date code prior to that listed above will have valve part numbers as listed in the chart below.
Caterpillar Information System:
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 Use Of 4C-4377 Stress Plate Group In 3114 And 3116 Cylinder Block Reconditioning {0672,0673,1201}
1994/09/01 Cylinder Head Bolt Tightening Procedure {1100}
1994/09/01 Caterpillar Introduces New Long Life Heavy Duty Engine Coolant {1395}
1994/08/01 Lubrication Change On Twin Disc Power Take-Off's (PTO's){3055}
1994/08/01 Complete Fuel System Flushing{1250}
1994/08/01 New Valve (Gas Admission) Has Chrome Plated Valve Stem{1100,1250}
1994/09/01 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance {1251}
1994/09/01 New PSG Governor With Pneumatic Air Head Control Available {1264}
1994/09/01 New Gasket Provides Improved Sealing Between Air Compressor And Drive {1803}
1994/09/01 New Gears And Pipe Plugs In Auxiliary Drive Group {1150,1165}
1994/09/01 New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}
1994/09/01 New Plunger In Fuel Pressure Regulating Valve {1250}
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}