Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-22-2012, 06:31 PM   #1
sethkestenbaum
Senior Member
 
sethkestenbaum's Avatar
 
Join Date: Jun 2011
Location: NYC with car in Rockland County
Posts: 369
Default Torque Tube to Differential 6 Bolts - What Torque?

How tight should the the 6 bolts be that connect the torque tube to the differential housing? Mine apparently weren't safety wired and I suspect are a little loose.

Thanks - Seth
sethkestenbaum is offline   Reply With Quote
Old 07-22-2012, 06:52 PM   #2
Terry, NJ
Senior Member
 
Terry, NJ's Avatar
 
Join Date: May 2010
Location: Bucks Co, Pa
Posts: 1,362
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

I would tighten them to "Just tight" about 35 / 40 lbs with a 3/8 rachet. This is not super tight. I think it's just about right. Henry Ford used a fine thread and a tighter than usual thread fit on all the nuts and bolts. Don't ever "Chase" the threads with a tap or die. Use a wire brush or a three corner file to remove nicks in the threads. A die will take too much off the thread. Henry was being ultra conservative using safety wire. The only place I have seen this is on airplanes. So, Between the tight bolts, the fine thread, the tighter than usual fit, and the safety wire, do you honestly believe the bolts will come loose on today's relatively smooth roads?
Terry
Terry, NJ is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-22-2012, 11:02 PM   #3
BILL WILLIAMSON
Senior Member
 
BILL WILLIAMSON's Avatar
 
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 5,395
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Do you all REALLY think that "safety" wire is better than quality lock washers? Bill W.
__________________
"THE ASSISTANT GURU OF STUFF"
BILL WILLIAMSON is offline   Reply With Quote
Old 07-22-2012, 11:30 PM   #4
Marco Tahtaras
Senior Member
 
Marco Tahtaras's Avatar
 
Join Date: May 2010
Posts: 2,789
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Quote:
Originally Posted by fordgarage View Post
Aircraft use safety wire, not lock washers. Just sayin.
Oh, there you go again confusing folks with facts!
__________________
http://www.abarnyard.com/
Marco Tahtaras is offline   Reply With Quote
Old 07-23-2012, 01:19 AM   #5
RUNNERBUN
Senior Member
 
RUNNERBUN's Avatar
 
Join Date: Nov 2011
Location: Queensland Australia
Posts: 181
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Old Henry didn't specify torque wrench settings. Just do them up firmly. Pick your poison, lock washers or wire?. Yes I think wire is the safer option, but is it really required or justified in this situation. I think not.
I have done well over 100,000 kilometres in my A over many different road conditions and the only time I used a torque wrench is on the Head bolts. and so far nothing has fallen off.
As a friend of mine would say, there is no need for a torque wrench, just do up your nuts and bolts up untill you hear a crack then back them off a quarter turn.
__________________
Adjust your points with gentle blows of a 2 pound hammer
RUNNERBUN is offline   Reply With Quote
Old 07-23-2012, 01:44 AM   #6
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 4,161
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Quote:
Originally Posted by fordgarage View Post
Aircraft use safety wire, not lock washers. Just sayin.
With this we could open the other can of worms as to how to tie the safety wire. I do mine like they do in Aircraft repair. Others may (will) differ.
CarlG is offline   Reply With Quote
Old 07-23-2012, 08:19 AM   #7
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 5,543
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

I would safety wire instead of lock washers as you want the bolt into the threads as far as possible to prevent ant leaks. JMO
Paul in CT
1931 flamingo is offline   Reply With Quote
Old 07-23-2012, 09:30 AM   #8
John Stone
Senior Member
 
John Stone's Avatar
 
Join Date: May 2010
Location: Wichita, Kansas
Posts: 434
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Quote:
Originally Posted by 1931 flamingo View Post
I would safety wire instead of lock washers as you want the bolt into the threads as far as possible to prevent ant leaks. JMO
Paul in CT
And they will leak thru the threads and around the lock washers so that is another reason to use safety wire.
John Stone is offline   Reply With Quote
Old 07-23-2012, 11:49 AM   #9
Tom Endy
Senior Member
 
Tom Endy's Avatar
 
Join Date: May 2010
Location: Southern California
Posts: 1,437
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

I have always wondered how the torque tube safety wire was installed at the factory. Most every rear axle assembly I have taken apart had the safety wire zig-zaging through the bolt holes in various ways that did not look very good. Many had no safety wire at all.

The method I use when installing a torque tube is to install six bolts from a large supply I have that have been bead blasted and wire wheeled. I tighten each bolt down as tight as I can get it using a nominal length box wrench, where there is little chance of twisting the head off. I then examine each bolt to see if it lines up such that the bolt hole is parallel to the circumference of the flange. Those that are not and are only slightly off I tighten some more. Those that cannot be lined up by additional tightening I remove and try another bolt. Often I can swap the position of two bolts to achieve the goal.

This takes more time than most mechanics are willing to spend on such a project, but when I am done all six bolts have the holes lined up parallel to the flange and they are all tight. I then insert the safety wire through each bolt hole and form a perfect circle with the wire with the two ends passing through the top bolt hole in opposite directions. I twist the two ends together and cut it such that about a quarter inch of the twist remains, then I bend it neatly over the top of the flange.

It may not be according to Henry, and the blue ribbon folks may not accept it, but it looks very neat and it has become my signature way of doing it.

This is done before the assembly is painted so that the final result is that the bolt heads and safety wire are painted.

Using lock washers in place of the safety wire may not be a good idea for the same reason lock washers should not be used on the 20 banjo bolts, as it could lead to oil leakage.

Tom Endy
Tom Endy is offline   Reply With Quote
Old 07-23-2012, 04:00 PM   #10
sethkestenbaum
Senior Member
 
sethkestenbaum's Avatar
 
Join Date: Jun 2011
Location: NYC with car in Rockland County
Posts: 369
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

I am much less concerned with the method of the wiring than I am with stopping a little leak I have and making certain that nothing falls off the car. I also don't want to overtighten and crack anything.
Thanks All. -Seth
sethkestenbaum is offline   Reply With Quote
Old 07-23-2012, 04:32 PM   #11
J Franklin
Senior Member
 
J Franklin's Avatar
 
Join Date: May 2010
Location: oregon
Posts: 1,451
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Use blue locktight, it won't leak past it.
J Franklin is offline   Reply With Quote
Old 07-24-2012, 01:13 AM   #12
BILL WILLIAMSON
Senior Member
 
BILL WILLIAMSON's Avatar
 
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 5,395
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Quote:
Originally Posted by J Franklin View Post
Use blue locktight, it won't leak past it.
J Franklin,
Every time I say "Loctite," someone yells as if I WELDED something together. Loctite is Model A's best friend to keep stuff from shakin' off! I only wish they made it in clear! Bill W.
__________________
"THE ASSISTANT GURU OF STUFF"
BILL WILLIAMSON is offline   Reply With Quote
Old 07-24-2012, 01:16 AM   #13
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 4,161
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

How come "Blue Loctite" comes in a red tube, and "Red Locktite" comes in a blue tube???????
CarlG is offline   Reply With Quote
Old 07-24-2012, 05:44 AM   #14
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 14,983
Default Re: Torque Tube to Differential 6 Bolts - What Torque?

Quote:
Originally Posted by CarlG View Post
How come "Blue Loctite" comes in a red tube, and "Red Locktite" comes in a blue tube???????
So you don't mix them up! LOL
Tom Wesenberg is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 10:49 AM.