| Drive axle nut torque [message #227665] |
Tue, 29 October 2013 21:48  |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
|
Senior Member |
|
|
I was tightening the drive axle nut to spec torque and it just didn't "seem tight enough". So I took a look in the various maintenance manuals.
'73 MM calls for 110
'75-'76 calls for 140-280
'76 supplement calls for 110-140
All are listed as plus enough additional tightening to insert the cotter pin.
So after all the years since the above info was published is there a consensus as to the proper torque value to use?
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] Drive axle nut torque [message #227706 is a reply to message #227665] |
Wed, 30 October 2013 09:04  |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Steve,
I discovered that there is a FIND function in Adobe Reader under EDIT so I typed in "drive axle" and found the following in each of
the manuals which I've copied and pasted info out of each manual.
The inconsistencies are worse than you noted!
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.
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 .
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.
I reckon there was confusion as to the amount of torque they wanted on the axle nut so they went through a number of different
write-ups for this procedure.
IIRC I torqued the nuts on Double Trouble to 110 and checked the alignment of the cotter key holes. It was no go so I set the torque
wrench to 120 - 130 -140 etc until the cotter pin hole aligned with a slot in the castle nut. I don't remember what that value was
but I know it was not greater than 280.
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428
-----Original Message-----
From: Steve Southworth
I was tightening the drive axle nut to spec torque and it just didn't "seem tight enough". So I took a look in the various
maintenance manuals.
'73 MM calls for 110
'75-'76 calls for 140-280
'76 supplement calls for 110-140
All are listed as plus enough additional tightening to insert the cotter pin.
So after all the years since the above info was published is there a consensus as to the proper torque value to use?
--
Steve
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
