HD6 Tran Fork 1st/Rev
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=202424
Printed Date: 05 Apr 2025 at 12:34pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD6 Tran Fork 1st/Rev
Posted By: Smokin Iron
Subject: HD6 Tran Fork 1st/Rev
Date Posted: 24 Jul 2024 at 11:13am
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Hello All, I'm new here with a newly purchased HD6. It has sat for 20 years due to the trans shifter not being able to shift gears. I was able to get it to run very easily and for the most part it runs great. I removed shifter and aligned the fork and it never goes to neutral. I can't get reverse either. I know that the fork is either broken or compromised to some extent. My question is do have to remove the trans to replace the fork if needed?
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Replies:
Posted By: gemdozer
Date Posted: 24 Jul 2024 at 6:44pm
| I am not sure but should need to removed the transmission but you could check by the inspection side plate transmission it could be some rust on shaft |
Posted By: Les Kerf
Date Posted: 24 Jul 2024 at 11:25pm
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I looked it up in my service manual and I think it would be nigh unto impossible to do without removing the transmission. Best wishes
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Posted By: Smokin Iron
Date Posted: 25 Jul 2024 at 12:21pm
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Thanks for the responses. Looks like I'll be removing the trans. luckily the trans can be removed pretty easily. The rail moves but the gear doesn't change it stays in 1st. |
Posted By: gemdozer
Date Posted: 25 Jul 2024 at 2:33pm
| Did you check the plunger locking |
Posted By: Smokin Iron
Date Posted: 25 Jul 2024 at 3:50pm
| Not really sure of the plunger but I think that is what is actuated by the clutch and has a rubber sleeve boot. It does move when the clutch is activated. The 1st/rev fork however is loose and can be moved sideways instead of just for and aft. The other 2 forks have no movement sideways and moves back and forth only. Due to the fork moving outboard for 1st and reverse the shifter bottom comes out of the gate. When all forks aligned it stays in 1st gear and won't go into reverse or neutral. |
Posted By: gemdozer
Date Posted: 25 Jul 2024 at 6:47pm
| You could check too the 3 capscrew shifting ball spring maybe the ball 1\2 are freeze on shaft. |
Posted By: Smokin Iron
Date Posted: 26 Jul 2024 at 2:34pm
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Okay I will check that also. Would a frozen ball prevent the fork from moving for aft? Remember it moves but what should be neutral is still 1st gear. if I move it to reverse the it stays in 1st. If I move any other fork it binds in 2 gears. Thanks for recommendations. |
Posted By: DiyDave
Date Posted: 26 Jul 2024 at 3:16pm
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Sounds like a bent or broken fork, or possibly wear on the tip(s) of the fork... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: gemdozer
Date Posted: 26 Jul 2024 at 8:02pm
| If the shaft move the ball are't freeze on well could be the fork or the the lock plunger is in trouble |