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Lifting machines

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Hydraulic problems

Number of messages: 7

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lou_m
New Jersey, United States

I Have Hyster Lift model H225-E, after engine start in 3 second oil coming back to hydraulic tank
and over fill, I try to fix and replaced main hydraulic pump, but problem continuous
Please I need idea to fix,
thank you

Posted 6 Nov 2009 08:12 AM

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willie1006
Pennsylvania, United States

Tou may have a clogged Hydraulic tank vent filter

Posted 7 Nov 2009 08:03 AM

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lou_m
New Jersey, United States

Thanks Willie, but I blower all lines, and I clean 100% all hydraulic system, to day I work
for 7 hrs. and I find one line from main hydraulic pump send direct pressure to Power Steering
Pump (mounted on Steering column)pressure is OK but NO have steering power, my idea
the problem coming from Steering pump in self.-

If you have same Idea please contact me, Thank you AGAIN Willie

Posted 7 Nov 2009 11:35 AM

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richard_y
Singapore, Singapore

dear Lou
Normally priority is always given to the power steering. You may have problem with priority valve. Can you turn the steering wheel when the engine is started? What about when you operate the lifting and tilting functions. Do they operate? If possible get the hydraulic diagram to check.

Posted 9 Nov 2009 01:24 AM

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lou_m
New Jersey, United States

Thanks Richard, Fork, tilt, and system is work good, Just Steering NO work with engine
runing

Hyster-Model H225-E

Posted 9 Nov 2009 03:16 AM

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richard_y
Singapore, Singapore

Dear lou. Do you have one or two hydraulic pumps. If there are 2 pumps then one will be for the lifting and the other is for the steering. If you have a steering pump, please check whether is there any oil coming out from the discharge side. If there is no oil then problem with the pump. If there is oil, please check whether oil is going into the torque generator. When you turn the steering handle, oil will be coming out from the steering valve to the steering cylinder. If oil is going into the cylinder and the wheels do not move then you can look at the steering cylinder seals. Hope this information help. If you have only one main hydraulic pump then it will be advisable to look at the priority valve

Modified 13 Nov 2009 05:10 AM
by poster.

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lou_m
New Jersey, United States

Thanks Again Richard, I start work under your direction.
I send message after job-

Posted 13 Nov 2009 05:17 AM

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