Steering problems. Fiat Allis 545B
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=177781
Printed Date: 15 May 2025 at 9:22pm
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Topic: Steering problems. Fiat Allis 545B
Posted By: GHamm
Subject: Steering problems. Fiat Allis 545B
Date Posted: 24 Jan 2021 at 9:26am
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When going straight ahead it steers good. When backing up it has a mind of its own, going either left or right. You can’t control it with the steering wheel. Gets worse the longer it run. Any ideas
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Replies:
Posted By: Coke-in-MN
Date Posted: 25 Jan 2021 at 10:18pm
Sounds like the cylinders might have internal leakage creating hydraulic cylinder voids in fluid . Could be the cylinders themselves or the steering box leakage .
Reminds me of my old straight frame Pettybone - going forward to load bucket as low speed was fine - backing up it would not track in same position as forward .
But if you roaded it you had to go in revers or it wandered everywhere and was next to impossible to go in a straight line .
My 715B TLB has hydraulic steering and when on the road you need to keep steering to correct straight travel - and when you check the steering wheel position it has made a complete revolution or more from when you started driving - slow hydraulic leaking and as is a hydraulic valve it has no mechanical stop or home center position , Yet at low speed you can lock wheels in any position of steer and load pump pressure to cylinder on tie rod
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Posted By: SteveM C/IL
Date Posted: 30 Jan 2021 at 11:34am
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Can't answer that but they do have an interesting system. Steering gear with drag link to physically steer it but also used hyd steering valve to operate steering cylinders.
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