1992/09/28 Caterpillar

New Self Locking Bolt Used On Engine Side Covers {1201}

Usage:

785, 789, 793 Trucks;
994 Loaders;
3512 (51Y) Engines

Description of Change: New self locking bolts are used to fasten the cylinder block side covers. Formerly, self locking bolts were not used. The new bolts will help prevent loosening and keep the cylinder block side covers secure.

Location of new 9X8872 Self Locking Bolts (1) and cylinder block side covers (2) in a typical cylinder block side cover group.

Adaptable To: New 9X8872 Self Locking Bolts are direct replacement for the former 0L1351 Bolts in the cylinder block side cover groups used on the above engines and machines. Forty eight 9X8872 Self Locking Bolts are required for each cylinder block side cover group on the 3512 Engines in 785 Trucks. Sixty four 9X8872 Self Locking Bolts are required for each cylinder block side cover group on the 3516 Engines in 789 and 793 Trucks, and 994 Tractors. The new self locking bolt is in effect as follows:

785 Truck 8GB682

789 Truck 9ZC632

793 Truck 3SJ30

994 Wheel Loader 9YF25

3512 Engine 51Y679

NOTE: If the new bolts are to be reused, apply 9S3263 Thread Lock to the bolt threads.

Caterpillar Information System:

1992/09/21 New Fuel Injection Pump Groups Have Larger Diameter Camshaft Bores, New Lifter Assembly, And Shorter Plunger And Barrel Assembly{1251,1253,1281,1292}

1992/09/21 New Plug And O-Ring Can Help Prevent Oil Leakage At The Flywheel Housing Gasket{1157,1307}

1992/09/21 Replacement Mechanical Temperature And Pressure Gauges (Indicators) Retained By Push-On Metal Retainers{7450}

1992/09/07 Major Engine Component Changes{1201,1202,1205,1218,1219,1230,1253,1288,1331}

1992/09/07 Governor Specifications Are Available Through The Technical Information System{1264,0374}

1992/08/31 Supplemental Coolant Additive Requirements{1352,1395,1063}

1992/08/31 Connecting Rod Bearing Eliminates The Need For Mid-Life Connecting Rod Bearing Roll-In{1219,1202}

1992/08/31 Be Sure The Fuel Injection Pump Housing Is Compatible With 0R0715 And 0R2545 Remanufactured Short Blocks{1201,1253}

1992/08/31 New "3406B Engine Instructor Manual" Available{0374}

1992/08/31 New Deutsch HD-10® Electrical Connectors Used{1400}

1992/08/24 New Cylinder Head Group Provides Lower Valve Guide Temperatures {1100,1104,1112,1123}

1992/08/24 Reusability of Exhaust Valves in All Caterpillar Engines {1105}

1992/09/28 Service Tools Available {0600,0700}

1992/09/28 New NEXG4516 Marine/Industrial Service Program Module(SPM) Available {1900,0782}

1992/10/05 Thicker Head Gaskets Available For Use With Resurfaced Cylinder Blocks{1124}

1992/10/05 New Cylinder Head Groups Provides Lower Valve Guide Temperatures{1100,1104,1112,1123}

1992/10/05 Product Support Literature{0374}

1992/10/12 Improved Hour Meters (Electric){7450,7480}

1992/10/26 Improved Windshield Wiper Motor Crank Assemblies Available For Parts Service{7305}

1992/10/26 3406 Truck Engine Component Update{1052,1119,1201,1202,1205,1214,1218,1254,1288,1803}

1992/11/09 Correct Identification Of Rocker Arm Assembly Components{1123}

1992/11/09 Relay Replacement Kits Available To Replace Relays In Engine Mounted Junction Box{1423,1422}

1992/11/09 Replacement Governors For Early Engines{1264}

1992/11/09 Improved Fuel Injection Line Assemblies And Clamps Used{1252}