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Komatsu D65E-6 transmission overheating issue found, need advice

Vetech63

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Aug 10, 2016
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The pinion has a small chunk taken out of it. Is this worth worrying about? It's not directly in the face of the tooth. Finding a replacement pinion might be a problem.
I would be more concerned about the pinion teeth spalling on its length.
 

ATCme

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Aug 24, 2015
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bc
I would be more concerned about the pinion teeth spalling on its length.
I'm confused? Is there something more in that picture I sent that I didn't see? Or are you referring to a different problem that can happen?
 

John C.

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The teeth show some case cracking/crushing type of damage on one side and it looks like a wear line on the other side. I'd probably check on price and availability and then consider the future of the machine.
It's pretty normal to do the torque converter when ever you have the transmission out but certainly isn't a requirement. I'd look at operating history for things like overheating or maybe oil sample trending upward on aluminum as part of the decision process. Amount of hours on the component would certainly be a consideration.
 

ATCme

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The teeth show some case cracking/crushing type of damage on one side and it looks like a wear line on the other side. I'd probably check on price and availability and then consider the future of the machine.
It's pretty normal to do the torque converter when ever you have the transmission out but certainly isn't a requirement. I'd look at operating history for things like overheating or maybe oil sample trending upward on aluminum as part of the decision process. Amount of hours on the component would certainly be a consideration.
Well here's the problem with determining its history. One it has no hour meter and two it came from rickety brothers. All I know is someone painted it green and that's it.
 

Vetech63

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Try locating aftermarket parts. Some are of good quality and much cheaper than OEM. Some of that may not even be available through Komatsu anyway.
 

ATCme

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bc
Here's a question. How hard is the TC to do with the trans in place?
 

John C.

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Since you don't know any history of the machine, I would probably pull and tear it down. Look at it this way, it might only need bearings and seals to give around 5,000 hours or more of service.
I wouldn't recommend anyone try to rebuild a convertor inside the machine. It should be pretty easy to access now that you have the trans out and on the floor.
 

ATCme

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Aug 24, 2015
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bc
After months of battling with this machine in an attempt to find another transmission the only ones we can find are later model ones. Can anyone confidently tell me if a model 144-15-0017 will work in place of a 144-15-0015 transmission?
 

Queenslander

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Apr 5, 2009
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Last edited:

ATCme

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Aug 24, 2015
Messages
113
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bc
Looks interesting for sure. Pinion is rusted but I have a new one. One concern is the the number stamped looks like -0014 not -00015 written in pen.

Any idea what shipping would be?
 

Queenslander

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Not a clue unfortunately.
It is at Broadbeach on the Gold Coast, which could explain the surface rust.
The other number written on the box could be a stock no. for RDW.
Might be worth giving them a call.
 

ATCme

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Aug 24, 2015
Messages
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bc
Ive dug even further into this transmission mess. My dozer, a D65e-6 had a 144-15-00015 transmission in it which is a series newer than what it came with originally. I have located a 144-15-00018 transmission that came out of a D65e-8 dozer. Going through the parts books of each trans I have determined that they use the same valve body, rear bolting flange, pinion, front yoke, inputs and output fluid line locations, and the shift linkage locations. The difference is internally and in some main housing upgrades that don’t change it dimensionally. My question is, if it can be answered, will this work with my -6 pumps and t/c? What upgrades did the -8 machines get over the -6 ones?
 
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