Field Service Bulletin Trucks

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Mack Trucks, Inc. Date Number PageField Service Bulletin 10/06/09 SB5170102(8)4. Back off slack adjuster.5. Remove snap ring and defective slack adjuster.6. Place at least one inner cam washer on shaft then install adjuster with the 7/16" adjusting hexpointing away from the air chamber.7. Secure adjuster to shaft with snap ring. Install enough washers (per TMC recommended practice)to reduce end play to less than .060" maximum. Zero end play is not acceptable.8. Rotate the 7/16" hex clockwise to move adjuster into clevis. (Do not pull push rod out to meetclevis).
Mack Trucks, Inc. Date Number PageField Service Bulletin 10/06/09 SB5170103(8)9. Coat clevis pin with anti-seize type lubricant and install. Secure clevis pin with a cotter pin. Bendeach cotter pin 90 degrees away to ensure it does not slip out of the clevis pin. Both ends of thecotter pin should form a 180 degree angle.Left Rear Drive AxleRight Rear Drive AxleItem Part Number Qty Description Usage1 21446722 2 SLACK ADJUSTER Second Driven Axle2 25624709 2 BRACKET, RETAINER Both Driven Axles3 20370396 2 PIN Both Driven Axles4 NA 2 COTTER PIN Both Driven Axles5 25156842 2 Slack Adjuster First Driven Axle (Not Shown)BACRefABCValue10-25 mm to Axle HousingTorque to 27-40 Nm (20-30 ft lbs)Torque to 54-67 Nm (40-50 ft lbs)
Page 1: Mack Trucks, Inc.Greensboro, NC USA
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Field Service Bulletin Trucks

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