Farm Equipment - WD hydraulic pressure

Print Page | Close Window

WD 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=164370
Printed Date: 28 Aug 2025 at 4:45pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WD hydraulic pressure

Posted By: Nathan (SD)
Subject: WD hydraulic pressure
Date Posted: 15 Sep 2019 at 10:01pm

I tapped into the hold valve with a gauge. I used the front port on the clutch pedal side.
The gauge shoots up to 2800-3000 psi when the lift arms top out. Then with the valve handle still in the full up position, the gauge drifts down to about 1800 psi after 10-20 seconds. Is this correct? Or is it a problem?

This WD won't lift much on the rear is the reason I even checked it.

Replies:

Posted By: MACK
Date Posted: 16 Sep 2019 at 7:16am

Should be around 3600, otherwise normal. MACK

Posted By: John426
Date Posted: 16 Sep 2019 at 7:52am

Interesting, do you an idea what pressure it is for an ED40?

Posted By: CTuckerNWIL
Date Posted: 16 Sep 2019 at 5:21pm

A .010 shim on the unloader spool will bring it right back to original if everything else is right. My 45 is running about the same as yours. I left it, because I was too lazy to take the pump off for the 3rd time to get it back to 3500PSI.

-------------
http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF