1999/02/15 Caterpillar

Bolts, Washer, And Spacers Grouped Into Fastener Groups In Engine Cylinder Head Groups {1100}

Usage:

777B (4YC),
777C (4XJ),
777D (3PR, 2YW),
785 (8GB),
785B (6HK),
785C (1HW, 5AZ),
789 (9ZC),
789B (7EK),
789C (2BW),
793 (3SJ),
793B (1HL),
793C (4AR, 4GZ) Off-Highway Trucks;
776B (6JC),
776C (2TK),
776D (5ER),
784B (5RK),
784C (2PZ) Off-Highway Tractors;
854G (1JW) Wheel Tractors;
D11N (74Z, 4HK),
D11R (8ZR, 9TR, 9XR) Tractors;
992G (7HR),
994 (9YF) Wheel Loaders;
5130 (7TJ, 5ZL),
5130B (4CS),
5230 (7LL) Excavators

Description of Change: The related bolts and washers, and the related bolts, washers, and spacers for 3500 and 3500B Engine cylinder head groups have been clustered into 2 new fastener groups. The fastener groups were created to make it easier to order the related bolts, washers, and spacers.

Locations of the 131-0420 (1) and 131-0421 Fastener Groups in a typical engine cylinder head group.

Adaptable To: The new 131-0420 Fastener Group consist of one 7N-1961 Bolt and one 5P-8248 Washer. The new 131-0421 Fastener Group consist of one 7N-1961 Bolt, one 5P-8248 Washer, and one 9Y-0635 Spacer. If the washer or spacer are not needed the 7N-1961 Bolt may still be ordered individually. The chart lists the 3500 and 3500B Engine cylinder head groups that included the new fastener groups.

Caterpillar Information System:

1999/02/15 Electrical System Schematic, SENR1864, Available {1400}

1999/02/08 New VIMS Application Guide Available {7601,0374}

1999/02/08 Correct Seal Usage Improves Service Life {7555}

1999/02/08 New Engine Pressure Sensors Available {1916,1917,1922,1923,1924}

1999/02/08 Valve Bodies Now Stress Relieved To Improve Service Life {3167}

1999/02/08 Special Instruction, "Installation Instructions For Improved Ride Control System", Now Available {0374,1408,4812,5051,5057,5077,5479,7332}

1999/02/08 Correction To Testing And Adjusting Manual, RENR2146-01 {0374,1435,5700}

1999/02/01 Procedure For Assembly And Installation Of Conventional Duo-Cone Seals Is Now Available{7561}

1999/02/01 Bearing Specifications For 3408E And 3412E Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) Hydraulic Drive Group{1714}

1999/02/01 Correct Assembly Of Bulldozer Trunnion Bearings Prevents Failures{6069}

1999/02/01 Special Instruction, REHS0224, Available For Brake Rework{3066,3154,4101}

1999/01/25 Improved Solenoid Valve Group Available {5479}

1999/02/15 Correction To Operation & Maintenance Manual SEBU6955 {0374,0375,7560}

1999/02/15 New Thrust Washer Improves Service Life Of Differential Group {3258}

1999/02/15 Correction To Operation & Maintenance Manual, SEBU6492-02 {0374,0375,7490}

1999/02/15 Correction To Disassembly And Assembly Manual, RENR2116 {0374,1387}

1999/02/15 New Auxiliary Drive Coupling Group Improves Service Life {3252}

1999/02/15 100 cm Of 5P-1471 Hose Required For each 994 Wheel Loader Dust Ejector {1068}

1999/02/15 New Weld Procedures On 994 Wheel Loader Buckets Increase Service Life {6101}

1999/02/15 Rework Procedure Available To Upgrade Differential Case Assembly {3258}

1999/02/15 Air Conditioning And Heater System Updates Improve Operation And Reliability {7304,7309,7337,7343}

1999/02/15 New Brake Disc Wear Specifications {4250}

1999/02/22 Improved Radiator Cores Now Available {1353}

1999/02/22 Improved Hydraulic Accumulator Mounting Clips Available {5077}