Farm Equipment - Wd45 hydraulic pressure

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Wd45 hydraulic pressure

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=169923
Printed Date: 23 Jun 2024 at 2:03pm
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Topic: Wd45 hydraulic pressure

Posted By: Bob (mo)
Subject: Wd45 hydraulic pressure
Date Posted: 08 Apr 2020 at 8:53am

On my WD45 I replaced the gaskets and o ring in the hydraulic transport valve and when the lift arms go up and max out it still blows fluid out both sides of the transport valve. The tractor hadnt been ran for a couple of years and the PO. said it wasnt doing that when he last ran it. I assume the hydraulic pressure is to high. How do you adjust the pressure?

Replies:

Posted By: DrAllis
Date Posted: 09 Apr 2020 at 7:09am

Adjusting the pressure requires removal and disassembly of the hydraulic pump. Now, you don't really know where the pressure is set at, you are guessing. Can't say I've ever had the situation of too many shims in the pump to make it more than 3400 psi. If that was the case, someone put them in there. It didn't magically happen by itself. Get a gauge and try and test it. I doubt that it is too high.

Posted By: Bill Long
Date Posted: 09 Apr 2020 at 10:46am

We had a WD that came into the shop. Was blowing front end loader cylinders. Checked the pressure and it was off the mark by a lot. Took the pump apart and found a BALE of extra shims. Pressure was well over 3400. Owner said he wanted to lift a bigger load.

Pulled the shims out and worked fine.

Listen closely to what Dr. Allis says. Could be true.

I remember repacking a transport valve and it solved the problem.

If yours is not Dr. Allis is probably correct. Course that was before '62

Good Luck!

Bill Long

Posted By: Bob (mo)
Date Posted: 09 Apr 2020 at 4:02pm

As soon as I can come up with pressure tester I will do that. If the pressure is not to high where is the problem the pump or the transport valve? Like i said I replaced all the seals in the transport valve. What else if anyting could be out of wack inside of the transport valve? Thanks for the replies I really appreciate it.

Posted By: Nathan (SD)
Date Posted: 10 Apr 2020 at 4:42am

Try switching the lines around to the valve. Had a transport valve spray like that once when the lines got reversed.

Posted By: Bob (mo)
Date Posted: 10 Apr 2020 at 10:01pm

Nathan nailed it. I had taken the lines lose to replace the hand clutch cover seal and hooked them back up backwards,switched them around and no more leaks. Thanks for all the help guys i really appreciate it.

Posted By: Ed (Ont)
Date Posted: 11 Apr 2020 at 10:50am

Wow that is great. Easy fix in this case!