1998/05/11 Caterpillar

New Engine Lifter Arm Assembly With Crowned Roller Used In Lifter Groups {1209}

Usage:

3114, 3116, 3126, And 3126 HEUI Machine Engines In Caterpillar Machines

Description of Change: An new lifter arm assembly with a crowned roller is used in the lifter groups on these machine engines. A crowned roller reduces edge loading on the roller and camshaft.

New 146-8147 Lifter Arm Assembly

Adaptable To: The new 146-8147 Lifter Arm Assembly is a direct replacement for the former 7W-3989 Lifter Arm Assembly. The former lifter arm assembly is canceled. The new 146-8147 Lifter Arm Assembly is used in the 7C-6078 Lifter Group in the above engines with mechanical unit injection and the 101-3263 Lifter Group in 3126 engines with Hydraulically Actuated Electronic Unit Injectors (HEUI).

The new 146-8147 Lifter Arm Assembly is effective in the 101-3262 Lifter Group in the 128-7367 Engine Arrangement for 3126 HEUI (4CW240) Machine Engines. The chart shows the effectivity of the new 146-8147 Lifter Arm Assembly in the 7C-6078 Lifter Group on mechanically unit injected 3114, 3116, and 3126 machine engines.

Caterpillar Information System:

1998/05/11 Bolt Pattern Change From Six To Four In Piston And Rod For Bucket And Stick Cylinders Improves Service Life {5457,5458}

1998/05/11 A New Switch Used In High Pressure Screens Of Discharge Lines From Hydraulic Pumps Is Resistant To Internal Leakage Of Hydraulic Oil {5050}

1998/05/11 Special Instruction, REHS0183, "Removal And Installation Of Tamperproof Caps On A RSV Governor" Is Available {1264}

1998/05/04 ROPS Instruction Film Available Through Parts Service{7177,7405}

1998/05/04 Improved Alternator Groups Now Available{1405}

1998/05/04 New Load Sensing Signal Relief Valve Prevents Wear Between Load Piston And Housing{5117}

1998/05/04 New Rear Glass Assembly Improves Cab Assemblies{7300,7310}

1998/05/04 Serviceable Parts For Hydraulic Pilot System Pump{5073,5085}

1998/05/04 New Retaining Ring In Final Drive Motor Group Improves Reliability{5058}

1998/05/04 Special Instructions Are now Available For Installing Two-Way And Four-Way Pilot Valves{5051,5059}

1998/04/27 New Hardened Sleeve For Load Check Valve In Control Valve For Stick Circuit Improves Service Life {5067}

1998/04/27 New Relief Valves In Main Control Valve Improve Swing Operation {5051,5454}

1998/05/18 New Final Drive Parts Reduce Gear Play {4051}

1998/05/18 Entertainment Radios Improved With Increased Reliability {7338}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8961 {5050,0372}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8971 {5050,0372}

1998/05/25 New Ether Starting Aid Group Used {1456}

1998/05/25 New Valve Cover Seal Used {1107}

1998/06/01 Support Literature Is Now Available For Maintaining Air Conditioning And Heating Systems {7300,7304,7309,7320,7337}

1998/06/01 New Duo-Cone® Seals In Track Rollers Improves Corrosion Resistance And Low Temperature Performance {4180,7561}

1998/06/01 New Improved Alternator Guard Assembly {7168}

1998/06/01 Shims Prevent Binding Of Rotor In Swivel {5060}

1998/06/01 Installation Of Tow Hooks To Carbody {7103,7062}

1998/06/01 New Hardened Locknut Improves Retention Of Impeller On Piston Pump Shaft {5070}