| [GMCnet] Front Axle Nut Torque [message #287107] |
Fri, 11 September 2015 19:56  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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G'day,
There are a number of inconsistencies in the Maintenance Manuals (MM) X-7425, X-7525, X-7625, and X-7725 regarding the torque to be
applied to the axle nuts. Below you will find them all listed. I would suggest that the procedure as defined by X-7625 and X-7725 be
used.
As far as lubrication goes while it is not called out in the MM I would suggest the threads of the axle nut and axle (CV joint) be
cleaned and wiped with a clean rag with a bit of oil on it. I would NOT use a grease containing molybdenum or anti-seize compound as
it could increase the clamping force and stress on the threads beyond the specifications noted.
***************************************************************
MM X-7425 Page 3B- 3
5. Install washer and nut on drive axle. Torque to 110 ft. lbs. Insert cotter pin and crimp. Tighten nut to insert cotter pin.
Page 3B-12 TORQUE SPECIFICATIONS
APPLICATION......................... FT. LBS.
Drive axle Nut at Wheel Hub... 110
Nut must be tightened to insert cotter pin.
***************************************************************
MM X-7525 Page 3A- 8
4. Install drive axle washer and nut. Torque nut to 140 ft. lbs. If necessary to align cotter pin slot, tighten nut and install NEW
cotter pin and crimp. Torque not to exceed 280 ft. lbs. NOTE: Do not back off nut to install cotter pin.
Page 3B-3 DRIVE axle ASSEMBLY (RIGHT HAND)
5. Install washer and nut on drive axle. Torque to 200 ft. lbs. Insert cotter pin and crimp. Tighten nut to insert cotter pin.
Page 3B-4 DRIVE axle ASSEMBLY (LEFT HAND)
8. Install drive axle washer and nut. Torque to 200 ft. lbs. Install cotter pin and crimp. Tighten nut, if necessary to install
cotter pin.
Page 3A-22 TORQUE SPECIFICATIONS
APPLICATION.....FT. LBS.
Drive axle Nut*....140-280
*NOTE: After reaching minimum torque required, nut must always be tightened to insert cotter pin. Never back nut off.
Page 3B-12 DRIVE axles
TORQUE SPECIFICATIONS
Application................................. Ft. Lbs.
Drive axle Nut at Wheel Hub....... 200
Nut must be tightened to insert cotter pin.
***************************************************************
MM X-7625 Page 3A-10
4. Install drive axle washer and nut. Torque nut. See Specifications at the end of this section for torque value and procedure. If
necessary to align cotter pin slot, tighten nut and install NEW cotter pin and crimp.
Page 3A-21 TORQUE SPECIFICATIONS
APPLICATION.........FT. LBS.
Drive axle Nut*........110 -140
(Do not exceed 280 ft. lbs.)
*NOTE: After reaching minimum torque required, nut must always be tightened to inset cotter pin. Never back nut off.
***************************************************************
MM X-7725 Page 3A-11
INSTALLATION
4. Install drive axle washer and nut. Torque nut. See Specifications at the end of this section for torque value and procedure. If
necessary to align cotter pin slot, tighten nut and install NEW cotter pin and crimp.
Page 3A-21 TORQUE SPECIFICATIONS
APPLICATION.........FT. LBS.
Drive axle Nut*........110 -140
(Do not exceed 280 ft. lbs.)
*NOTE: After reaching minimum torque required, nut must always be tightened to inset cotter pin. Never back nut off.
***************************************************************
Regards,
Rob M.
The Pedantic Mechanic
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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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