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Old 09-01-2022, 05:00 PM   #1
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Power Steering box - adjustment ??

Forgive me if this is a duplicate, I tried searching and did not find anything - hence the post.
The chassis is a 2002 Spartan diesel pusher with a Cat 3126E. The issue is there is a small but noticable wonder in the steering. I have had several Toyota LC with a PS box adjustment. Do these boxed have such an adjustment?

If so how can it be identified? Is it documented somewhere?

I raised the front end so the tires were just touching. I then manually turned the steering mechanism from under the rig. All the U joints seemed fine. There was noticable free play directly into the steering box. Based on the LC experience this can be tightened.

Thanks in advance. - Dan
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Old 09-02-2022, 07:41 PM   #2
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Assuming you have a MM chassis, the steering box adjustment between the frame and the box. A thin open end wrench is required to loosen and hold the nut while turning the adjustment screw with a straight-blade screwdriver held sideways. Then the adjustment screw must be held in position while tightening the clamp-nut.


Take care not to over-tighten the adjustment screw, otherwise gears may bind and/or break. (I think mine safely tightened ½-turn.

The gears wear more where most of the movement occurs, which is from driving straight to driving a curvy road. Then when you make a sharp turn or turn to lock/maximum angle, the less-worn gear area binds.
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Old 09-02-2022, 08:21 PM   #3
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What Ray said. It is just like the adjustment on old GM power steering boxes.

I tightened mine about 1/2 turn.
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Old 09-03-2022, 04:37 PM   #4
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Thank you. Yes, I believe it is a MM.

That is similar to the LC adjustment. I did not see the adjustment screw, I will look again.
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Old 09-04-2022, 04:46 PM   #5
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It is on the driver's side of the steering box.
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