Farm Equipment - lost the hydraulics on my D 15

Print Page | Close Window

lost the hydraulics on my D 15

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=11158
Printed Date: 24 Jan 2025 at 12:58am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: lost the hydraulics on my D 15

Posted By: darrel in ND
Subject: lost the hydraulics on my D 15
Date Posted: 17 Apr 2010 at 11:59am

Last fall when I went to unhook the hay rake from my D 15, the hydraulics wouldn't work to raise the lift arms and run the single acting cylinder on the rake. I was in a hurry, and just assumed that it was low on oil, so I left it go for what was supposed to be for a couple days, but didn't get back to it until today. Today I went back to it with some hydraulic oil, thinking that I'd just add some oil and it would work fine. Not so. When I pulled the dip stick, it was not low on oil, and still no hydraulics. The lift arms raised very slowly, then the rake started to come up, but that was it. The best it'll do now is just barely raise the lift arms over about a 5 minute time period. I added some marvel mystery oil to it and drove it for about a half hour thinking maybe there was a valve stuck that would free up, but that didn't help. I know this question has probably been asked on here a hundred times, but I'll ask it again, since I'm not too computer sharp at looking for posts from the past. What could the problem be? Any help would be greatly appreciated. Thanks, Darrel

Replies:

Posted By: CTuckerNWIL
Date Posted: 17 Apr 2010 at 3:55pm

It could be your high pressure plunger lost it's spring and is not developing the needed pressure. About all I could suggest is put a 5000 lbs gauge on it and see what it is putting out. If you are not getting at least 3000 lbs, you may have to remove the pump and rebuild it.

-------------
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

Posted By: Dave(NEPA)
Date Posted: 17 Apr 2010 at 4:30pm

Do the arms go down using the lift/lower lever and how does the sound of the pump change with the clutch in or out? Also look and see if the block that adjusts the traction booster is loose at all, I thought my pump was shot until some guys on the forum told me to adjust the traction booster, that block is real sensitive to adjustment.

Posted By: darrel in ND
Date Posted: 19 Apr 2010 at 7:36am

Dave, could I get some more info from you on where this TB block is located and how to adjust it? My lift arms do go down like they are supposed to, and as far as the pump making noise, I really can't here much out of it at all. Thanks, Darrel