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

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 12-19-2019, 03:21 PM   #1
xelhan
Member
 
Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 63
Default Steering Gear


Hello,

I would like to know what kind of spline is used on the steering shaft marked #25 on the drawing?

I also need the length and size of the square on the sector shaft.

Thanks,
Chris
Attached Files
File Type: pdf 2-TOOTH-STEERING-BOX-3585.pdf (480.3 KB, 56 views)
xelhan is offline   Reply With Quote
Old 12-19-2019, 06:24 PM   #2
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 10,990
Default Re: Steering Gear

Most Gemmer type steering shafts have a very shallow spline to fit the worm. It's only there to align the shaft properly with the worm and in turn keeps the steering wheel positioned correctly. The worm gear is a press fit on the shaft so special tooling must be used to perform a replacement. This would also require a good quality press. The sector shaft is very close to 1 1/8-inch in diameter so the square end is likely near 1-inch but I don't have one apart to check.

There is an early two tooth worm gear that uses a 9 roller type bearing on each end. Parts are not available for these. They have to be replaced with the later type worm and the 13 roller tapered bearings if they are damaged or excessively worn.
rotorwrench is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 12-20-2019, 01:49 AM   #3
xelhan
Member
 
Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 63
Default Re: Steering Gear


Thank you rotorwrench!

1.125 dia. seems right for the sector shaft and an inch about right for the square

Interesting regarding the input shaft. Do you know where can I find more information about how to do this job correctly?

Chris
xelhan is offline   Reply With Quote
Old 12-20-2019, 07:17 AM   #4
David R.
Senior Member
 
Join Date: Aug 2016
Location: West Virginia
Posts: 218
Default Re: Steering Gear

I recently replaced the worm while rebuilding my AA steering gear due to rough bearing surfaces. It was quite a job and had I to do it again I would purchase the new worm and shaft assembly. I pulled the old worm with a large bearing puller set up. Lots of alternating heat, sweat, and penetrating oil. It is designed as a TIGHT press fit on a shallow tapered spline that partially cuts its way on.
The problem arises when pressing a new worm on as how to do it without bending the hollow shaft.
Luckily I have a friend with a well equipped shop who enjoys tackling these type problems.
We made a press by welding up scrap:
A heavy pipe with a cap welded on. The shaft with nut installed flush goes in here. We next packed the steering shaft tightly in the center of this tube with dry sand. Then brackets (heavy angle and thick base) were welded to the pipe to support an hydraulic jack to push the worm on. We warmed the worm, careful not to use enough heat to damage temper, and it was still quite a job!
Thankfully it went on without bending the shaft an steering gear is on the truck in fine order now.
David R. is offline   Reply With Quote
Old 12-20-2019, 07:39 AM   #5
ryanheacox
Senior Member
 
ryanheacox's Avatar
 
Join Date: Apr 2013
Location: Northwest CT
Posts: 797
Default Re: Steering Gear

Would a 20 ton press be enough to press the worm on/off?
ryanheacox is offline   Reply With Quote
Old 12-20-2019, 10:22 AM   #6
Jacksonlll
Senior Member
 
Jacksonlll's Avatar
 
Join Date: Jul 2012
Location: Michigan-- Member of Oakleaf of MARC
Posts: 1,332
Send a message via ICQ to Jacksonlll
Default Re: Steering Gear

Here is a 4min video showing how we got the worm on.

https://youtu.be/K_Jzy4kTk6M
Jacksonlll is offline   Reply With Quote
Old 12-20-2019, 10:26 AM   #7
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 10,990
Default Re: Steering Gear

This is a thread from the V8 side but there are others. This illustrates a tool to aid in worm removal and installation but there are other threads. I just couldn't find them on short notice.

https://www.fordbarn.com/forum/showt...worm+gear+tool

The Les Andrews Model A shop manual give some pointers.

Here is another that's good.
https://www.fordbarn.com/forum/showt...=steering+worm

Last edited by rotorwrench; 12-20-2019 at 10:34 AM.
rotorwrench is offline   Reply With Quote
Old 12-20-2019, 10:33 AM   #8
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 2,315
Default Re: Steering Gear

Do a search on this forum, there's lots of threads w/good info about doing this.
__________________
Don't go away mad, just go away.
katy is online now   Reply With Quote
Old 12-21-2019, 01:25 PM   #9
xelhan
Member
 
Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 63
Default Re: Steering Gear


The Youtube video showed a straightforward way to mount the worm

The square is 15/16"
xelhan is offline   Reply With Quote
Old 12-22-2019, 11:29 AM   #10
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 2,315
Default Re: Steering Gear

Post #3 in the thread
https://www.fordbarn.com/forum/showt...=Steering+gear
gives an easy way to install the worm.
__________________
Don't go away mad, just go away.
katy is online now   Reply With Quote
Old 12-22-2019, 02:17 PM   #11
xelhan
Member
 
Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 63
Default Re: Steering Gear


Probably the best way to do it
xelhan is offline   Reply With Quote
Reply

Thread Tools
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 11:13 AM.