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Steering gear box disassembly

JohnRowehl

JohnRowehl

Member
Location
South Central PA
Working on the steering gear box on my ‘49 77 RC. Have the front end off and the bolster separated from the axel. Worm gear and bearings are out.
Need to get the steering sector arm, sector gear and eccentric off the sector shaft o be able to put in the new bottom O ring seal. The Oliver service
manual says use a “suitable puller”. (whatever the heck that is) to remove the sector arm. Alternatively, drive it out with a press. I take the latter to mean
that you would drive the sector shaft upward until the arm is free. But it looks like you can drive it upward only so far before the outside edge of sector
gear would hit the edge of the casting. Or is the idea that you drive it up a little in order to get a puller underneath the sector arm and then pull it off the
rest of the way?

Or can you start by driving the sector shaft downward and remove the sector gear first, and then driving the shaft upward to free the sector arm after
that?

Don’t have my own hydraulic press and would like to have a plan on how to do this before I go to a friend’s shop to use his. Would appreciate any
guidance for disassembling this.
 
If it's typical of most steering gears, it's a taper spline.

They can be very difficult to break loose. If you can get a 2 jaw puller to hook under it, put some pressure on it and some heat. Usually won't take a lot of heat.

If the puller won't go, try the double hammer method, a back up hammer on one side, hit it on the opposite. Also hit down on the arm if you can get to it.

I would not recommend using a fork or prying against the bottom of the gear housing, easy to damage the leading edge where the seal goes in.

But do leave the nut on but loose. That will protect the threads, and contain the arm as it will let go all at once!
 
Thanks Steve. Youre the man! I was successful using a press to push up on the shaft from below the arm. Your advice was dead on target; leaving the nut on as the arm did suddenly let go. Did the same as I drove the shaft down from the top to free the sector gear. Again; it abruptly snapped loose.
 
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