INFO. ON AIR COMPRESSOR BOLT INSTALLATION. GMC Truck GMC MD Bus Chassis (B Model) 1994

SUBJECT: INFORMATION ON AIR COMPRESSOR BOLT INSTALLATION AND TORQUE SEQUENCE

MODELS: 1994-95 TOPKICK/KODIAK WITH AIR BRAKES (RPO JE4) AND CATERPILLAR 3116 DIESEL ENGINE (RPO LX0)

PROPER AIR COMPRESSOR INSTALLATION TO CATERPILLAR 3116 DIESEL ENGINES IS SENSITIVE TO THE BOLT INSTALLATION AND TORQUE SEQUENCE METHOD USED. THE PROPER INSTALLATION AND TORQUE SEQUENCE PROCEDURE IS DETAILED BELOW.

1. INSTALL AND TORQUE BOLTS (ITEM 1) THAT ATTACH THE TIMING GEAR COVER ASSEMBLY TO THE FRONT GEAR HOUSING (ITEM 2) AND AIR COMPRESSOR (ITEM 3). TORQUE BOLTS TO 90 - 110 N.M (66 - 81 LB FT). 2. INSTALL BOLTS (ITEM 4) THAT ATTACH THE AIR COMPRESSOR BRACKET (ITEM 6) TO THE AIR COMPRESSOR (ITEM 3) FINGER TIGHT. THE BOLTS SHOULD BE A TIGHT FIT BUT THE BRACKET SHOULD STILL BE ABLE TO MOVE. 3. INSTALL BOLTS (ITEM 7) THAT ATTACH THE AIR COMPRESSOR AND AIR COMPRESSOR BRACKET ASSEMBLY TO THE ENGINE BLOCK FINGER TIGHT. 4. TORQUE BOLTS (ITEM 4) THAT ATTACH THE AIR COMPRESSOR BRACKET (ITEM 6) TO THE AIR COMPRESSOR (ITEM 3). TORQUE BOLTS TO 59 - 75 N.M (44 - 55 LB FT). 5. TORQUE BOLTS (ITEM 7) THAT ATTACH THE AIR COMPRESSOR AND AIR COMPRESSOR BRACKET ASSEMBLY TO THE ENGINE BLOCK. TORQUE BOLTS TO 59 - 75 N.M (44 - 55 LB FT).

FIGURES: 1

CAPTIONS: FIGURE 1 - AIR COMPRESSOR INSTALLATION

Object Number: 82796 Size: FS

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.