HD11 clutch problems
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=87878
Printed Date: 30 Jun 2025 at 2:06am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD11 clutch problems
Posted By: Andrew_D
Subject: HD11 clutch problems
Date Posted: 11 Apr 2014 at 4:21pm
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Fired the dozer up today for the first time this season! 4 hours later, my clutch won't disengage! And now for the rest of the story... (As Mr. Harvey would have said) We bought a new piece of farm-land last spring and when seeding, found we couldn't get into one little 3 acre field because the opening in the bush wasn't wide enough. Didn't get the dozer over there last fall, so my plan is (was) to get it done before the ground gets too soft this spring. Anyway, I pushed for about 4 hours today and noticed that it seemed to be stalling the tracks a bit easier than I remembered. Figured that the clutch must need an adjustment and just took it easy on the heavy pushing. When I get it in the shop for some other work, I'll have to check the clutch adjustment. Anyway, I finished a push and when I pushed the clutch lever ahead, I felt a "different" resistance than usual. It still dis-engaged and I threw it in reverse and re-engaged. When I went to stop to push again, the clutch will not dis-engage now. Feels/sounds like something is grinding and it lugs the engine down a little bit. I pulled the inspection cover off the right-hand-side, but didn't see anything obvious. So decided to let the machine cool off, come home, clean up and settle down for some week-end research with my set of manuals and the A-C Forum. So what am I looking at?????? Andrew |
Replies:
Posted By: DMiller
Date Posted: 11 Apr 2014 at 4:52pm
| At minimum a release bearing has failed, the grinding you can feel is probably the collar trying to spin on the release fingers, would not press it too far to try and save the pressure plate. |
Posted By: Lazyts
Date Posted: 11 Apr 2014 at 5:08pm
I think DMiller has "fingered" the problem. |
Posted By: Andrew_D
Date Posted: 11 Apr 2014 at 11:47pm
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So I've had a look through the manuals. Looks like the clutch can come out through the floor which means I should be able to do it where it sits instead of trying to get it onto a trailer and back to the shop. Won't be able to do anything this week-end, but next week should be fun! With daytime highs of -5ºC to +3ºC, it shouldn't be too soft getting in and out of there with my truck! Any tips? Tricks? Andrew |
Posted By: DMiller
Date Posted: 12 Apr 2014 at 6:26am
| Take a tarp for over cover! |
Posted By: Andrew_D
Date Posted: 14 Apr 2014 at 9:33pm
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Well, I managed to get the clutch out of the parts dozer. 2 hours yesterday and 2 more today. It came out more-or-less like the service manual said, although I have no idea how they think that bell housing is going to come out of there with the clutch still on the flywheel. I had to set the bell housing down on the cross member and get the clutch out first. Then I could turn the bell housing sideways to get clearance around/between all the levers, pedals, brackets, etc. Definitely would have helped if I could figure out how to grow 2 or 3 more arms! I ended up wrapping a chain around the canopy to give me a purchase point and using a come-along to slowly winch the clutch up out of there while I guided it. Then did the same thing with the bell housing. And yet in the service manual, they show a guy lifting it out like it weighs 1 pound???? Tomorrow, I'll see about getting the clutch out of the working machine and see if I can make 1 out of 2! I already noticed that the parts dozer clutch brake pads have disintegrated. Also, the rear engine seal on the parts dozer is/was leaking AND the grease lines inside the bell housing have ruptured AND it's been over-greased. The entire bell housing and all clutch components are coated in grease/oil! Good for rust prevention, but it's going to mean a fair bit of cleanup. Andrew |
Posted By: Andrew_D
Date Posted: 15 Apr 2014 at 5:27pm
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Well, I got the dozer working today. Ended up being the clutch brake was pooched. Somehow the set screw that locks the clutch brake managed to get loose. It had rattled it's way to the rear of that big 4" threaded bearing carrier and fell off onto the shaft. Couldn't disengage the clutch because it would jam up against the clutch brake disc. Put the clutch brake on from the parts dozer and it is working for now. It seems a little sloppy in the threads, so will likely finish the current project and take it back to the shop. Plus I tried to adjust the clutch while I was in there and it won't adjust. I can flip up the locking lever, but the ring won't turn. Tried prybars, hammer and punch, nothing worked. The service manual describes cleaning the clutch by plugging the bottom hole, filling with solvent and running it for a bit. Would that help to loosen things up?? Andrew |
Posted By: DMiller
Date Posted: 15 Apr 2014 at 6:50pm
| The clutch was released at the time you tried to adjust it? |
Posted By: Andrew_D
Date Posted: 15 Apr 2014 at 7:05pm
Yup. Also tried it while a helper wiggled the clutch lever back and forth just in case! Andrew |
DMiller wrote:Posted By: Andrew_D
Date Posted: 17 Apr 2014 at 6:18am
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Well, I finished the project yesterday without anything else blowing up. Now I need to get my neighbour's lowbed and move the dozer back to the shop for a proper repair. I've also got some track pads down at Lazyts 's place to go pick up and put on. Will likely post more here once it is in the shop. Andrew |