Construction and other equipment

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1969 HD4

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=181779
Printed Date: 15 May 2025 at 6:21am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 1969 HD4

Posted By: NickB
Subject: 1969 HD4
Date Posted: 15 Jul 2021 at 9:26am

One more cry for help here. Ran the dozer last night, snaps into reverse just as good as it does in fwd. Then sometimes it’s a bit sluggish or slipping (only in reverse). Mess with it back and forth and can usually get it to snap into reverse full power again, I’m very confused on what could be going on. Does seem like maybe it happens a little more once it warms up. Any help is appreciated! I had an earlier post here but wasn’t getting any replies

Replies:

Posted By: Eric B
Date Posted: 15 Jul 2021 at 9:28pm

I'm no expert on these transmissions but by principle it sounds like the seals for the hydraulic pressure governing the reverse clutch are compromised. I've had the same scenario in the long past, amazingly enough it still just kept on going without a distinct breakdown.

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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!