AC 175 D question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=172236
Printed Date: 08 Sep 2025 at 5:23am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: AC 175 D question
Posted By: TomYaz
Subject: AC 175 D question
Date Posted: 22 Jun 2020 at 11:35am
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Does the power steering use the same sump as the rest of the hydraulics? I assume yes? If so, I assume the sump is shown here at the bottom with a pipe disconnected? If I get the hyd sump buttoned up and filled, could I expect to move the front wheels with steering shaft even if tractor off? Its %100 hydraulic as far as I can tell, unlike my D17  ------------- If its not an All-Crop, it all crap! |
Replies:
Posted By: DrAllis
Date Posted: 22 Jun 2020 at 3:22pm
| Steering is "hydrostatic" which means 100% hydraulic. I would not expect to be able to turn the wheels on that tractor. Some tractors will steer with engine off and others will not. All depends on how much internal leakage there is. |
Posted By: DSeries4
Date Posted: 22 Jun 2020 at 7:38pm
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I agree with the Doctor. I always wondered why some of mine would steer and others wouldn't. I had the steering motor on my XT rebuilt a couple of years ago when I was restoring it and it did make a difference. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 10:10am
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Thanks...makes me wonder how the tractor is moved around for repair when cant start it... ------------- If its not an All-Crop, it all crap! |
Posted By: DrAllis
Date Posted: 23 Jun 2020 at 10:18am
| Skidloader with forks under the front axle and pick it up. Chain axle loosely to the fork carriage so it can't slide off. |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 10:23am
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Seems a really poor design to have no way of turning wheel without power....neighbor has a tractor thats %100 hydro front end but even with power off he can get the wheels to turn ------------- If its not an All-Crop, it all crap! |
Posted By: DrAllis
Date Posted: 23 Jun 2020 at 10:50am
| When this salvage yard 170/175 was new you could also steer it manually !! |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 11:08am
Oh.. then I misunderstood what you said. So I can get it to steer. Per my previous unanswered question, does the steering hydro use the sump per my pic? My immediate goal is to get it under cover and take the head off and see what I am dealing with. Got to be able to move it.
------------- If its not an All-Crop, it all crap! |
DrAllis wrote:Posted By: injpumpEd
Date Posted: 23 Jun 2020 at 11:37am
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If it had been run recently, it likely would be able to steer a little bit with the steering wheel. But, when they've been sitting for years, there's little chance a hydrostatic steering system from and brand will work. There is a "closed loop" system built into it in case of loss of engine/hyds when driving, to maintain control. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 11:40am
I see...Is the whole hydraulic system closed loop or just for the steering? ------------- If its not an All-Crop, it all crap! |
Posted By: ranger43
Date Posted: 23 Jun 2020 at 11:47am
x2 we have a 170 diesel we bought new and had to pull start it over the years and you can steer it with some effort if recently ran |
Posted By: injpumpEd
Date Posted: 23 Jun 2020 at 12:24pm
Only steering. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 12:42pm
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Thanks guys, good info! ------------- If its not an All-Crop, it all crap! |
Posted By: Joe(TX)
Date Posted: 23 Jun 2020 at 1:57pm
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Actually the steering is open center also. The steering control is more like a metering valve. As long as it has enough oil in the system, the rotor will pump oil to the cylinder to steer. ------------- 1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A |
Posted By: TomYaz
Date Posted: 23 Jun 2020 at 3:08pm
I sense a disturbance in the force.... ------------- If its not an All-Crop, it all crap! |
Posted By: injpumpEd
Date Posted: 23 Jun 2020 at 4:27pm
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The whole tractor is an open center system, but when shut off, the hydrostatic steering system becomes a closed loop manual steering system for very limited use. There's a big difference in closed center, and closed loop system lol! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |