New Torque Specification For Some Bolts In Valve Mechanism Group {1102,1123}
Usage:
G3606 (3XF),
G3608 (4WF),
G3612 (1YG),
G3616 (4CG) Engines
The two bolts (1) that fasten the rocker arm shaft to the rocker arm shaft support and the two bolts (2) that fasten the rocker arm shaft support to the cylinder head have a new torque specification. Tightening the bolts to the specified torque will help reduce fretting on the rocker arm shaft support. Tighten bolts (1) and (2) to a torque of 430 ± 60 N·m (310 ± 44 lb ft). Please make note of this new specification in the appropriate Specifications modules.
Locations of bolts (1) and (2) in the valve mechanism group.
Caterpillar Information System:
1997/08/01 Revised Starting Procedure For Engines Using Kiene Valves {1100}
1997/08/01 New Manual Valve Group [Measure Cylinder Pressure (Kiene® Valve)] Used; Kiene Valve Installation Procedure {1100,1118}
1997/08/01 Installation Procedure For Cylinder Head Studs {1100}
1997/08/01 Changes To Cylinder Head Salvage Procedure {1100}
1997/08/01 Air Quality Requirements For Turbocharger Air Impingement System {1052}
1997/08/01 New Specification For Clearance Between Turbocharger Turbine Wheel Blades And Turbine Wheel Cover Ring {1052}
1997/08/01 New Turbocharger Wash Water Lines Groups Used {1052}
1997/08/01 Revised Systems Operation, Testing And Adjusting Manual For 3612 And 3616 Diesel Engines Is Available {1000}
1997/08/01 New Electronic Control Group Available For Gas Engine Ignition Groups {1550,1559}
1997/08/01 Reliability And Fatigue Strength Improved In Connecting Rod {1218,1219}
1997/08/01 Improved Clamps For Turbocharger Exhaust Couplings Reduce Exhaust Leaks {1052}
1997/08/01 Troubleshooting Data Sheet For Diesel Engines {1000}
1997/08/01 Crankshaft Oil Passage Plugs {1202}
1997/08/01 Connecting Rod Bearing Part Numbers {1203,1219,1230}
1997/08/01 Procedures For Changing From Running On Heavy Fuel Oil (HFO) To Running On Distillate Fuel {1280}
1997/08/01 New Gear Assemblies With A Stronger Shaft Are Used In Governor Drive Groups {1288}
1997/08/01 New Schedule For Cleaning Unit Injectors In Engines In Heavy Fuel Oil (HFO) Applications {1290}
1997/08/01 Fuel Injector Trim Set Screw {1290}
1997/08/01 Guidelines For Electrically Grounding Gas Engines {7423}
1997/08/01 Changes To Default Overcurrent Settings For EMCP II+ {4490}
1997/09/15 New Dual Stage Torsional Coupling Assembly Available For Use With Twin Disc MG 514C Marine Transmissions{3357}
1997/09/15 3406C Pump And Governor Changes Provide Improved Oil And Fuel Leak Resistence{7555}
1997/09/15 Improvements Made For Exhaust Manifold Groups{1059}
1997/09/15 New Exhaust Shield Groups Use Soft Wrap Insulation Instead Of Hot Box Shielding{1067}