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repair steering mechanism on 424 intl w/o power steering

C

Charles Arp

New User
I have lots of back and forth play in the steering worm on a 424 intl diesel without power steering. Can someone tell me the probable cause and give somme pointers on how to fix it.I have not been able to locate replacement parts before I take it down!!
 
You'll probably find like i did that the bearings have collapsed and the worm is lifting up and down when you turn the wheel. Plus the peg from the sector shaft will probably be very worn.
Bearings are available as single balls from the bearing suppliers, adjusted by shims if I remember correctly. I could not get a new peg so basically hollow ground it so that the damaged parts were clear of each other and it ran on the less damaged parts. Then adjust the box in the normal manner.
Caused in my case by water leaking in to the steering box and rusting out the bearings!
Good luck and God Bless,
Rex
 
I see the 424 has a similar steering system as on the 240U I bought last year. The steering was so bad that you could turn the steering wheel a full revolution before it engaged the wheels. One major difference is that you have shims on the vertical worm gear shaft. If those are worn, broken, or missing, the vertical shaft will lift as the worm shaft turns. There can be no vertical movement of the worm gear.

In my case I discovered both the worm shaft (horizontal) and worm gear (vertical) were in like new condition. However, the tapered shaft the Pitman arm attaches to the worm gear was badly damaged due to the Woodruff key slot being enlarged. Only a little motion (maybe 10 degrees) in the gearing translates to a lot of motion in the steering wheel. Apparently this was a not uncommon problem, cause when I found a used worm gear ($200+), it was in the same condition and I returned it. Finally had a machinist repair the original.

Hope your's just needs more shims.
IMGP0260-vi.jpg
 
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