1999/03/22 Caterpillar


New Brake Piston D-ring Seals Improve Service Life Of The Service Brake Group {4251}

Usage:


824G (4SN),
834B (7BR) Wheel Tractors;
825G (6RN) Soil Compactors;
826G (7LN),
836 (7FR) Landfill Compactors;
980G (9CM, 2KR, 2SR),
988F Series II (2ZR) Wheel Loaders

Description of Change: New brake piston d-ring seals are available for service brakes. The new brake piston d-ring seals are made of a harder material. The harder d-ring seals improve resistance against wear.


Service Brake Group

(1) 151-6251 D-ring Seal.
(2) 151-6250 D-ring Seal.

Adaptable To: New 151-6250 D-ring Seal (2) is a direct replacement for the former 106-3326 D-ring Seal (discontinued). New 151-6251 D-ring Seal (1) is a direct replacement for the former 106-3327 D-ring Seal (discontinued). The new 151-6250 and 151-6251 D-ring Seals are a part of the 108-0067 and 115-9756 Service Brake Groups. The new D-ring Seals are effective with the machines listed in the Table and adaptable to first production for the machines listed. In order to adapt to earlier machines, refer to Disassembly and Assembly - "Final Drive Spindle and Service Brake" for the machine being serviced.

Caterpillar Information System:

1999/03/22 Fuel Filler Cap Requires Service {1273}
1999/03/22 New Boom Cable Installation Procedure Clarifies Cable Routing {6301}
1999/03/22 New Hook Cable Installation Procedure Clarifies Cable Routing {5417}
1999/03/22 New Boom Cable Installation Procedure Clarifies Cable Routing {6301}
1999/03/22 New Hook Cable Installation Procedure Clarifies Cable Routing {5417}
1999/03/22 New Exhaust Temperature Sensor {1919}
1999/03/22 Improved V-Belt Sets Now Used On Alternator And Fan Drive Pulleys {1357}
1999/03/22 Improved Duo-Cone Seals Available {4192,7561}
1999/03/15 Caterpillar Prelub Troubleshooting {1400,1469}
1999/03/15 New Top Piston Rings Available {1215}
1999/03/15 Grain Elevator Components Are Now Stainless Steel {6931}
1999/03/15 Correction To SENR6765 Hub Bolt Torque {5062,5070}
1999/03/22 New Bolts Required For Propel Planetary {4050}
1999/03/22 New Valve Cover Used On 3054 Engines {1107}
1999/03/22 New Fuel Shutoff Solenoids With Improved Durability Available {1259}
1999/03/29 Cooling System Factory Filled With Extended Life Coolant {1395}
1999/03/29 Improved Transmission Yoke/Plug Installation {3253}
1999/03/29 New 157-6186 Duo-Cone Seal Available For Certain Off-Highway Trucks {7561}
1999/03/29 Smoke Beam Improved To Prevent Water Collection {7050}
1999/03/29 New Exhaust Manifold Group Seal Provides Improved Exhaust Gas Sealing {1059}
1999/03/29 Cylinder Head Exhaust Port Thermocouple Group Removed From 3500 With Electronic Unit Injection (EUI) Machine Engines and 3500B Machine Engines {7498}
1999/03/29 Check Distance Between Sun Gear And Planetary Carrier When Final Drive Cover Is Removed {4050}
1999/03/29 Maximizing Off-Highway Truck Brake System Life And Improving Reliability {4251,4255}
1999/03/29 Correction To Service Manual Modules For Certain Off-Highway Trucks {3030,3160}
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