| [GMCnet] Rear Axle (Spindle) Nut Torquing Procedure [message #249293] |
Fri, 09 May 2014 21:57 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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G'day,
It turns out that torquing the rear axle (spindle) nut is in two places in each of the GMC Maintenance Manuals X-7425, X-7525,
X-7625 and X-7725. It can be found in Section 4 - Rear Suspension and Section 5 - Brakes.
I reviewed them all and found that the procedure varies from place to place and was revised in each manual. Below is the version as
found in X-7725 / Section 5 Brakes.
If you don't have a copy of this manual you can download it here: http://www.bdub.net/factory-manuals.html
X-7725 / Maintenance Manual Supplement / Section 5 - Brakes Page 5-2 & 3 / Component Replacement / Brake Drum Installation
CAUTION: See "Caution" on page 5-1 of this supplement.
CAUTION: THIS FASTENER IS AN IMPORTANT ATTACHING PART IN THAT IT COULD AFFECT THE PERFORMANCE OF VITAL COMPONENTS AND SYSTEMS,
AND/OR COULD RESULT IN MAJOR REPAIR EXPENSE. IT MUST BE REPLACED WITH ONE OF THE SAME PART NUMBER OR WITH AN EQUIVALENT PART IF
REPLACEMENT BECOMES NECESSARY. DO NOT USE A REPLACEMENT PART OF LESSER QUALITY OR SUBSTITUTE DESIGN. TORQUE VALUES MUST BE USED AS
SPECIFIED DURING REASSEMBLY TO ASSURE PROPER RETENTION OF THIS PART. WARNING: WHEN SERVICING WHEEL BRAKE PARTS.
1. Install hub and drum assembly (figure 6).
2. Install flat washer and castillated nut on hub while rotating hub and drum assembly.
3. Tighten castillated nut to 25-30 lbs. ft. torque to position bearings. (Be sure drum is rotating while tightening nut).
4. Back off nut 1/2 turn.
5. Retighten nut finger tight, secure if possible with cotter pin.
6. If unable to secure at finger tight, back off nut to first securing position.
7. Check end play between hub and spindle it should be .001 to .005 inch.
8. Replace inner and outer dust caps.
9. Adjust brake shoes as outlined under BRAKE SHOE ADJUSTMENT.
10. Be sure brake adjustment cover is installed in lanced area opening of backing plate, see figure 3.
11. Install wheel and tire assembly. Refer to Section 10 of Maintenance Manual X-7525 for details.
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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