1994/08/29 Caterpillar

Cylinder Head Bolt Tightening Procedure {1100}

Usage:

Caterpillar Machines Powered By 3054 (5HK) And 3056 (8XJ) Machine Engines

The following is the correct procedure for tightening the cylinder head bolts and nuts.

NOTE: Some earlier publications mentioned retorquing the cylinder head bolts after running the engine at partial load for thirty minutes. This is NOT correct. NO RETORQUE IS REQUIRED.

Cylinder Head Bolt Tightening Procedure

Cylinder head bolt identification and bolt tightening sequence for 3054 Engines.

Cylinder head bolt identification and bolt tightening sequence for 3056 Engines.

1. Put engine oil on the threads of the cylinder head bolts and nuts. Tighten all bolts and nuts in number sequence to a torque of 110 N·m (80 lb ft).

2. Again tighten all bolts and nuts in number sequence to a torque of 110 N·m (80 lb ft).

3. Tighten all bolts and nuts in number sequence as follows:

a. Short bolts (S) 150° further

b. Medium length bolts (M) 180° further

c. Long bolts (L) 210° further

Caterpillar Information System:

1994/08/29 Description And Usage Of The Electronic Programmable Transmission Control II (EPTC II) {3168}

1994/08/29 Improved Automatic Retarder Control (ARC) {3121}

1994/08/29 Special Instructions SEHS9793 Available For Servicing 2A-6380 Suspension Seat {7324}

1994/08/29 Washer Can Be Used To Prevent Seal Deformation In The Hoist Control Valve Group {5051}

1994/08/29 New Extendable Stick Tube Assemblies Provide Better Routing Serviceability {5486}

1994/08/29 Main Power Relay May Not Work Properly {1423}

1994/08/22 New Fuel Priming Pump And Improved Gasket Used{1258}

1994/08/22 Lubrication Change On Twin Disc Power Take-Off's (PTO's){3055}

1994/08/22 New Hi/Low Refrigerant Pressure Switch Is Now Used On Certain Air Conditioned Machines{7320}

1994/08/22 Door Insulation Retention Method Is Improved{7308}

1994/08/22 Drive Shaft Bearings Inside The Hitch Need To Be Greased During Assembly {3253,7100}

1994/08/22 New Hoist Control Valve Used To Improve Hoist Cylinder Operation{5136}

1994/08/29 Oil Drain Assembly Improved To Reduce Thread Interference With Drain Plug {1302}

1994/08/29 New Exhaust Manifolds, Longer Mounting Studs And Spacers Used In Exhaust Manifold Groups {1059}

1994/09/05 Fabric Suspension Cylinder Covers Are Now Used To Protect Cylinder Rods{7201}

1994/09/05 New Radiator Shroud and Support Bracket Improve Service Life{7272,1351}

1994/09/05 Improved Engine Door Hinge Used{7263}

1994/09/05 Air Cleaner Filter Screens Require Maintenance{1051}

1994/09/05 New Plunger In Fuel Pressure Regulating Valve{1250}

1994/09/05 Fan V-Belt Part Number Has Changed For Certain Models With The 3204 Engine{1357}

1994/09/05 Use Of 4C-4377 Stress Plate Group In 3114 And 3116 Cylinder Block Reconditioning{0672,0673,1201}

1994/09/05 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}

1994/09/05 New Water Seals Used In Cylinder Head Assemblies{1124}

1994/09/12 Procedure To Bleed And Charge The Rear Suspension {7213}