1997/01/20 Caterpillar

New Check Valve Group And Larger O-ring For Load Monitoring System Eliminates O-ring Interference {5067,7200}

Usage:

769D (5TR),
773B (63W),
773D (7ER),
775B (7XJ),
777B (4YC),
777C (4XJ),
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL),
793C (4AR) Trucks;
771D (6JR),
775D (6KR) Quarry Trucks;
776B (6JC),
784B (5RK) Tractors

Description of Change: A new check valve group and larger 20.62 mm (.812 in) diameter O-ring seal replace the former check valve group and smaller 19.05 mm (.750 in) diameter O-ring seal in the load monitoring system.

The smaller diameter O-ring seal, used with the former check valve group, could interfere with the threads of the mating part resulting in damage to the O-ring seal.

The larger O-ring seal clears the lead-in chamfer of the threads on the mating part preventing damage to the O-ring seal.

Adaptable To: The new 129-1029 Check Valve Group and 114-3361 O-ring Seal are effective with the PIN numbers listed in the chart. Earlier 777C, 785B, 789B, 793B Trucks, and 784B Tractors (listed in the chart) are adaptable. 773B, 775B, 777B, 785, 789, 793 Trucks, and 793C Tractors are also adaptable.

View A: New 129-1029 Check Valve Group (1) Larger 114-3361 O-ring Seal. (B) 20.62 mm (.812 in) Diameter. View C: Former 9T-3637 Check Valve Group (2) Smaller 6V-5142 O-ring Seal. (D) 19.05 mm (.750 in) Diameter.

Caterpillar Information System:

1997/01/20 Increased Tightening Specification Improves Retention Of Thrust Washer Screws In Final Drive {4051}

1997/01/20 New Ether Starting Aid Groups Include Flexible Hose Assemblies Instead Of Tube Assemblies {1456}

1997/01/20 Modification Of Electronic Control Module (ECM) Controlled Variable Speed Fan Clutch Bracket-Shaft Assembly For Easier Fan Speed Sensor Removal {1359}

1997/01/20 "E-Trim" Unit Fuel Injectors {1290}

1997/01/20 Special Edition, SEPD0325, "Major Improvements And Service Information For 768C, 772B, 776C, 776D Tractors, 771C, 771D, 775B, 775D Quarry Trucks And 769C, 769D, 773B, 773D, 777C And 777D Trucks" Is Available {0374}

1997/01/20 Adjustment To Window Hold Back Latch Improves Operation {7301,7310}

1997/01/20 Cab Rear Window Improvements Provide Improved Sealing And Visibility {7301,7310}

1997/01/13 Quickly And Accurately Set Valve Lash{1105,0766}

1997/01/13 Use 125-9622 Seal Installer To Install 118-9163 Seal In Water Pumps{1361,0708}

1997/01/13 Piston Ring Groove Gauges To Quickly And Accurately Determine Reusability Of Pistons{1214,0763}

1997/01/13 Use 126-1023 Stem Pusher For Sleeve And Coupling Removal On Hose Assemblies{5057,0684}

1997/01/13 More Collets Now Available For XT5 And XT6 Hoses Using 4C-9480 Hose Tooling Group{0684}

1997/01/20 Improved Bearings Used In Output Transfer Gear Group {3159}

1997/01/20 Dump Body Mounted Mud Deflectors (Mud Flaps) Are Available To Prevent Mud From Being Thrown On The Back Of The Tractor {4220}

1997/01/20 A Port Now Provided In The Engine Oil Filter Group For Scheduled Oil Sampling (S.0.S.) {7542,1306,1051}

1997/01/20 VIMS-PC Service Tool Operating System Environment Answers {7601}

1997/01/20 Methods Of Obtaining Engine Flash Files {1902}

1997/01/20 New Remanufactured Water Pump Groups Include Cast Iron Impellers {1361}

1997/01/20 Improved Multi-Row Modules (IMRM) Used In Caterpillar Radiators Have Different Designs {1353}

1997/01/27 Charcoal Air Filter Available Reduces Odors From Outside Air {7309,7320,7342}

1997/01/27 Improved Procedure For Preloading Final Drive Bearings Now Available {4050,4059}

1997/01/27 An Improved Adjustment Procedure For The Steering Console Cylinder Eliminates Steering Console Drift {4300,5258}

1997/01/27 Special Instruction, REHS0033, "Assembly Procedure For 777D Truck Body" Is Available {0374,7258,7960}

1997/01/27 New Temperature Sensor For Differential Improves VIMS Data Accuracy {3290,7601}