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Allis Chalmers Discussion Forum
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found the tranny problem d-15, Ques?

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joe puleo

09-17-2004 13:43:25




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OK, I have spent some time getting to know my ac d-15 Industrial. What I thought was a clutch problem is in fact tranny problem. It slips out of 1st and grinds its way into 4th. 2&3 ok. When I took insp. cover off I could see the splines on 1st where the collar slides on are beat up. Also, the shifter forks are worn down in a few spots. The foks have "lips" on their tips where they engage the trans, but on some, they are completely ground soothe with the rest of the fork. I guess as the forks wore, nobody wanted to fix it and it eventually ruined the gears. THIS IS MY QUESTION.
1)Can I just weld on some more "meat" onto the worn part of the forks? Anyone have the specs?

2)with trans apart, can I use use "hard surfacer" welding rods to build up and re-cut the splines?

Thanks in advance
Joe

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Pat Cruise

09-18-2004 07:18:20




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 Re: found the tranny problem d-15, Ques? in reply to joe puleo, 09-17-2004 13:43:25  
As a machinist I would say you could get away with that as a fix and make it as good as or better than new,However with parts availability as good as it is for Allis tractors it may be more worth the time and money to seek out used parts or possibly N.O.S. parts.I would try that first.Good Luck!

Pat Cruise



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joe puleo

09-18-2004 10:10:20




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 Re: found the tranny problem d-15, Ques? in reply to Pat Cruise, 09-18-2004 07:18:20  
Thanks Pat, I think I can and will get a 4th gear, but the part # on 1st gear pinion side is different than in my manual and parts book. I think b/c it's a Industrial, it may have a different gearing for 1st. Anyone have the specs for the lips on the forks where they contact?



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Torry k

09-21-2004 17:57:37




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 Re: found the tranny problem d-15, Ques? in reply to joe puleo, 09-18-2004 10:10:20  
I have the same problem wth my industrial d15 backhoe,only mine pops out of 3rd and 4rth. Heard they had a weak tranny! You got further then me though, im to scared to look!



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Dale(MO)

09-22-2004 18:10:55




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 Re: found the tranny problem d-15, Ques? in reply to Torry k, 09-21-2004 17:57:37  
Torry,
I had the same problem on my HD3 crawler. It is almost identical to the D14 and 15, but NONE of the gears are used on any other tractor. I ended up using a wire feed to build up the corners of the lock cogs on the pinion gears and shift collars, then filed (where I could) and used a Dremel tool to reshape the teeth. It only took a small spot (good penetration, as little heat as possible), so I had no luck with a stick welder. I only had 70,000 lbs. wire - would like to have had 120,000 - but I wouldn't use hard surface. You want it to be close to the same as the parent metal. Hard surface tends to work-harden and pop off. I think as long as you don't grind it into gear, it will last a long, long time. There is no real load on those corners, unless the whole tooth rounds off (right back to where we started). It's a real pain in the ***, but if you figure $250.00 per gear (used), and $150-250.00 per shift collar, the time just flies by. Good luck!

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