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Power Steering issue
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jpi72 View Drop Down
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Joined: 27 Jul 2019
Location: Hudson, Iowa
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jpi72 Quote  Post ReplyReply Direct Link To This Post Topic: Power Steering issue
    Posted: 19 hours 6 minutes ago at 9:25pm
I have what I believe is a 610 Allis Chalmers forklift.  It has a D15 Series 2 engine (160 cu. in.)  When I start the forklift the power steering is really hard to turn.  It takes quite a while of warm up before it works properly.  The forks lift right away.  Do you have any suggestions?  Am I getting air into the system when it sits overnight?

Joel
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22609 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 hours 45 minutes ago at 9:46pm
In January of 2025 you said: "we do not suspect the pump".  Back then, I told you I thought it was the pump. Yesterday, I again told you I thought the pump was losing its prime when it sits.  I am visualizing a single TANDEM (twin) pump that has a problem in the power steering section and it may be at the driveshaft end of the pump, pulling air thru the shaft seal.
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jpi72 View Drop Down
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Joined: 27 Jul 2019
Location: Hudson, Iowa
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jpi72 Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 10 minutes ago at 6:21am
Thank you for the reply.  I will study the pump better.  I assumed it was just one pump.
Joel
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22609 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 1 minutes ago at 6:30am
And I don't know because I'm not there looking at it. You can't have LIFT hydraulics and then have ZERO power steering if there is one pump. A priority/flow divider valve could be a possibility but your description doesn't make me think so. If there are two exit lines on your pump, it is a twin tandem pump.

Edited by DrAllis - 9 hours 19 minutes ago at 7:12am
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
Points: 3608 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 8 hours 37 minutes ago at 7:54am
I have one that does the same thing if left sitting for a few days. The colder the weather the worse. The steering section is the one next to the drive - just like a series IV D17. There is a relief for the steering that dumps back to the intake pipe but don't think that is the issue. After a few minutes, it works fine. Lift works fine all the time. Common sump. It does have manual steering as the steering wheel is doing the steering with great difficulty.
When told "it's not the money,it's the principle", remember, it's always the money..
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