Construction and other equipment - I600 Steering issue

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I600 Steering issue

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=101865
Printed Date: 10 Jul 2025 at 2:56am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: I600 Steering issue

Posted By: Douglas
Subject: I600 Steering issue
Date Posted: 12 Feb 2015 at 6:26pm

Having an issue on a I600 forklift with the steering going out when a heavy, but well within the limits load, is lifted. On lighter loads, the steering works fine but on heavier loads, the steering wheel can be turned but it does not move the wheels at all. Has anyone seen this issue before and what could cause this to happen.

Replies:

Posted By: Bret (OH)
Date Posted: 18 Feb 2015 at 6:39am

I would suspect that the piston seals in the steering cylinder may be allowing oil to bypass from one end of the cylinder to the other inside the cylinder. When lightly loaded the volume of oil may overcome the leak and allow steering, but when loaded and higher pressures are required the leaking seals may be allowing the oil to bypass them.

Posted By: DiyDave
Date Posted: 18 Feb 2015 at 6:50am

Years ago, we had this issue on an old IH forklift. It turned out to be something along the lines of what Butch said, I know it's apples to oranges, but on the IH, the solution turned out to be a diagonal hole was drilled in the valve block, in later models, to give priority to the steering, over the load. Not likely much help on the AC, unless it used a similar one piece valve block casting...

Posted By: Douglas
Date Posted: 18 Feb 2015 at 8:04am

Thanks for the information. That is what I was thinking but it didn't make sense to me why that would cause the steering issue. Your description makes sense and I understand why that could cause the issue. Problem is trying to find a new pump assembly (part number 240101) or a rebuild kit for it. Does anyone know where I could find either of them?

Posted By: Coke-in-MN
Date Posted: 18 Feb 2015 at 9:41am

From what was mentioned just rebuilding cylinder might solve problem - most parts used may be found at any hyd shop or even ag dealer , as it may be just O rings or such .

Other option would be MINNPAR , Herc U Lift in MN also might be able to help as they were AC fork truck dealer and had a knowledgeable service dept .

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: dustinmo
Date Posted: 23 Feb 2015 at 5:38am

I would think it would be something else as an I600 fork lift is a reversed I600 and the heavier the load being picked up the lighter the rear should become (the steering axle) so it should steer esier with weight being picked up, but as to the problem I cant help you other than this