Yanmar YM155D problem w/ replacement gear from Yanmar: Yanmar Tractors  -- Other Tractor Brands Discussion Forum and Review Yanmar YM155D problem w/ replacement gear from Yanmar: Yanmar Tractors -- Other Tractor Brands Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

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 08-21-2003, 15:01 Post: 62353
John A
2003-08-21 15:01:10
Post: 62353
 Yanmar YM155D problem w/ replacement gear from Yanmar

I've got a Yanmar YM155D --the 1st/reverse gear on the transmission croked (1st/reverse gear 14T #194340-25530) ...found a dealer in MS who gave me a good price and ordered the part...the part arrived but the ID (inside diameter) of the gear has not be machined...the race which the gear glides on won't fit inside the gear...so, sent it back to the dealer, subsequently the dealer sent it back to Yanmar...they sent out a new gear --WITH THE SAME PROBLEM !! Long story short --this has been going on since May, 2003 and Yanmar (as told by the dealer) is unwilling to rectify the problem. So, here I am waiting and woundering if Yanmar is worth all the hassel? The big question is "am I the only one with this same experience working with Yanmar".






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 08-22-2003, 04:42 Post: 62406
TomG

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 Yanmar YM155D problem w/ replacement gear from Yanmar

No experience with Yanmar parts myself nor do I know the TX. I'm wondering if there's a chance that the gear is intended to be shrink fit onto the race I guess it's a compound bearing and it would be the outside of the outer race that is maybe recessed into the gear. Granted it's a stretch of an idea. I haven't seen anything like that in the TX's I've been into, but it's just a thought. A manual should mention such a procedure if that's the case. If so, the original one might have been loose due to the cracked gear.

Another possibility is that the bearing race has a spur on it due to the original damage. Unfortunately the more likely possibility is that Yanmar has a new OEM supplier and the gears aren't exact replacements.






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 08-22-2003, 18:01 Post: 62474
jamtrac2003



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 Yanmar YM155D problem w/ replacement gear from Yanmar

Yanmar parts are normally very accurate in their dimensions. Perhaps the part has to be pressed on.
Of course it is possible that a part was made wrong, but two?? Take a Micrometer and measure the I.D. of the part, then measure the O.D. of the race it goes into, if they are close, then it is a press fit. If they are not close, have the gear machined out, it will be faster than re-ordering again. Gary J.






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 09-21-2003, 09:16 Post: 64470
AEP1
2003-09-21 00:00:00
Post: 64470
 Yanmar YM155D problem w/ replacement gear from Yanmar

Take the gear to your local machine shop. They will know if the I.D. is right for a pressed-on fit. If it is not they will be able to machine to the right ID for your shaft. They can also broach a keyway if need be.

Good luck
Andy






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 09-21-2003, 17:10 Post: 64489
jamtrac2003



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 Yanmar YM155D problem w/ replacement gear from Yanmar

I just looked in the YM155D Parts Manual, Yanmar made two different gears for 1st/rev. If your s/n is before 51000, then it calls for part no. 194200-25530.






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 09-22-2003, 06:48 Post: 64511
TomG

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 Yanmar YM155D problem w/ replacement gear from Yanmar

Good info, and that's the second reason why I have a parts manual. The first reason is for the exploded diagrams. There are all sorts of notes in my Ford manual about part differences before and after production upgrades or for models marketed if different regions. My manual is hard copy and may be a bit out of date but a dealer's shouldn't be.

There's a good chance that's the problem, but you'd also think that a parts guy would have noticed several dated entries in the manual and would have asked for the tractor's serial number.






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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

Thread 62353 Filter by Poster:
AEP1 1 | jamtrac2003 2 | John A 1 | TomG 2 |




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