Increased Torque Values For Hardware In Service And Parking Brake Groups{4251,4267}
Usage:
773B and 777 Trucks;
772B and 776 Tractors
The torque values for some of the bolts and nuts in the service and parking brake groups in the above models have been increased. See Illustrations 1 and 2 for the location of the hardware and the new torque values.
Formerly it was possible for the specific bolts and nuts shown in Illustrations 1 and 2 to loosen during machine operation. The increased torque will keep the bolts and nuts tight.
Make a note of this article in the Service Manuals for the 773B and 777 Trucks and 772B and 776 Tractors.
Illustration 1. Location of hardware in 9D7385 Service and Parking Brake Group (773B, 772B)
Illustration 2. Location of hardware in 9D2685 Service and Parking Brake Group (777, 776)
Caterpillar Information System:
1982/08/23 Parts Service Identification Of O-Ring Seal Used In Dry Chemical Agent Valve And Cylinder Group{7401}
1982/08/23 New Thrust Washer Can Prevent Wrong Oil Sample Readings{1102}
1982/08/16 Output Transfer Gear Case Bearings Have More Capacity{3159,3176}
1982/08/16 Lubrication Of Input Shaft Bearings In Final Drive{4091}
1982/08/16 New Latch Used In Cab Door Groups{7308}
1982/08/16 Modification Of 2P8315 Bracket Assembly{0652,1286}
1982/08/16 Improved Circle Tooth Segment{6152}
1982/08/16 New Exhaust Manifold Permits Expansion To Prevent Cracks{1059}
1982/08/16 Use Only Correct Parts To Fasten Drive Gears To Winch Drums{5401,5402}
1982/08/16 New Engine Oil Filter Group Uses Spin-On Type Filter Assemblies; Conversion Group Available{1306,1307,1318}
1982/08/16 Turbocharger Lubrication Valve Removed; Conversion Group Available{1309,1307}
1982/08/16 New Rear View Mirrors Available{7319}
1982/08/23 New Mechanical Switches Are Available For Parts Service{7332,1400}
1982/08/23 Repair Kit For The 5P9700 Hose Cutter Is Available{0623,1380}
1982/08/23 New Time Delay Conversion Groups Available{7400}
1982/08/30 Added Methods To Decrease The Effects Of High Sulfur Fuels{1355,1280,1318,1000}
1982/08/30 New Radiator Core Assembly Has Full-Frame Reinforcement Plate For Longer Service Life{1353}
1982/08/30 Make Sure Generator Leads Do Not Move Against Frame{4459}
1982/09/06 Vacuum Tester Checks For Leaks Between Valve Face and Seat{0651,1103,1105}
1982/09/06 Repair Kits For Service Brakes Now Available{4260,4261,4262,4251}
1982/09/06 Adapter And Seal Guide Make Assembly Of Water Pumps Easier{0622,1361}
1982/09/06 New Water Pump Uses New Seal And Impeller{1361}
1982/09/06 Improved Inlet And Exhaust Valves{1105}
1982/09/06 Reusability Of Camshaft Rollers And Roller Followers{1209,1210}