1992/11/09 Caterpillar

Correct Identification Of Rocker Arm Assembly Components{1123}

Usage:

D11N, 776B Tractors;
777B, 785, 789, 793 Trucks;
994 Loaders;
3500 Family Of Engines

Reference: Parts Manuals and Microfiche for the above machines and engines.

The Parts Manuals and Microfiche for the above machines and engines incorrectly identify the rocker arm assembly components. The 7W0370 Rocker Arm Assembly actuates the unit injector. The serviceable components of this rocker arm assembly are the 8N7197 Socket and the 1W4594 Bearing. The 9Y1741 Rocker Arm Assembly actuates the intake and exhaust valves. The serviceable components of this rocker arm assembly are the 9Y1770 Socket and 1W4594 Bearing. The Microfiche will be corrected at the next update.

Illustration 1. Serviceable components of 7W0370 Rocker Arm Assembly. 8N7197 Socket (1). 1W4594 Bearing (2).

Illustration 2. Serviceable components of 9Y1741 Rocker Arm Assembly. 1W4594 Bearing (2). 9Y1770 Socket (3).

Caterpillar Information System:

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

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

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

1992/10/05 Product Support Literature{0374}

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

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

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

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

1992/09/28 New Self Locking Bolt Used On Engine Side Covers {1201}

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}

1992/11/09 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}

1992/11/09 Oil Holes In Crankshaft Main And Rod Journals{1202}

1992/11/09 New Liner Seat Inserts Available{1217}

1992/11/09 New 690 Main Rotor Lamination For 3500 SR4 Power Generators{4457}

1992/11/16 New Connecting Rod Assembly Used{1218}

1992/11/16 New Spacer Plate Gasket Provides Improved Sealing Around Push Rod Compartment{1221}

1992/11/16 New Cylinder Head Gasket, Spacer Plate And Head Bolts Used; New Cylinder Liner Projection Measurement Method; New Cylinder Head Torque Sequence{1124,1221,1216}

1992/11/23 New Gasket And Plate Used In Front Housing Group To Help Prevent Oil Leaks{1151}

1992/11/23 Supplemental Coolant Additive Requirements{1352,1395,1063}

1992/11/23 Procedure For Seating The Ball In The Fuel Return 4L8546 Check Valve{1274}