Nige
Senior Member
nothing really. How many hours did the converter have on it since the last time it was rebuild.?
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D6h tc issues
- Thread starter D6hmatt
- Start date
Nige
Senior Member
It only takes 10 minutes to install a new hourmeter with a zero reading……
John C.
Senior Member
Nige is right about abusing a torque converter. The abuse is mostly in the maintenance. You can overheat it but that is usually a result of a plugged radiator. Not changing the transmission oil is about the only other thing I can think of. Which bearing was going bad?
HeavyMetalRepair
Well-Known Member
Overheating. You’ll never know the history but at least now you’ll know you have a fresh tc.
Nige
Senior Member
Overheating will only kill a converter if the cooling system is not up to snuff IMHO. Even then it would take hundreds if not thousands of hours to do it and all it would generally do is cook the seals, not trash the hard parts such as bearings.
HeavyMetalRepair
Well-Known Member
Inexperienced operators can and do overheat torque converters with perfectly functioning cooling systems. Operating in the incorrect speed and stalling the converter for long periods of time. I see it frequently in my area.
Nige
Senior Member
We’ll have to agree to disagree then, because IMO repeatedly overheating a converter will cook the seals first & foremost, not trash the mechanical parts. This will certainly shorten the life of the component but generally speaking one shouldn’t need to go into the case with a shovel to dig the broken bits out.
@D6hmatt - We’re still waiting for some photos of the damage from inside the converter.
@D6hmatt - We’re still waiting for some photos of the damage from inside the converter.
Fair enough. Ya i will get pics when i drop off parts at the mechanics shop. Im not sure which bearing went but he described it to me that it looked like it had been rebuilt before and as bearing got more play it allowed stator,rotar and turbine all to contact one and another a bit so suggested we chamge out scored parts as well. It looks basicle like it was just time for a rebuild not realy abuse or overheating more just that many hrs on it since last rebuild which who knows when. But like u guys say it will be fresh now last me long time. Im the only guy who runs it and its basicle my side hustle just a little brushing, dirt work, cleaning up farm land so i never realy see any high oil temps or real hard hard work its all just a little of everything. I only put on maybe 300hr a year so should last me long time. The hottest ive ever seen it run was a dirty hill i was cutting push down and back up it so no good coolimg time but i was 110c on torque converter and 100c on engine. I beleive book says max of 130c on tc operating and that was very short time so moving forward i think this should last me awile.
Nige
Senior Member
High converter outlet temp alarm usually comes on mid-to-high 120s Celsius. If that happens it’s time to back the load down a bit.
Nige
Senior Member
Are you referring to Yellowmark parts or something else.? IIRC there is another budget parts line but I forgot the name.
HeavyMetalRepair
Well-Known Member
Cat classic is another aftermarket from the dealer. I recommend genuine cat parts for everything. unless they’re not available then you have to go aftermarket.
Nige
Senior Member
That’s the one I couldn’t remember.
TBH for a converter I personally wouldn’t be comfortable going with anything other than full fat OEM parts, but then again I have no idea what the OP’s budget is.
Simon C
Senior Member
- Joined
- Jul 1, 2015
- Messages
- 3,009
- Location
- Rocky Mountain House , AB., Canada
- Occupation
- Heavy Equipment Mechanic
Built a lot of Komatsu torques, was hard to get all the correct parts by serial number breaks from them , never mind from aftermarket, who some of the bearings I seen before were fit for trash bin only. Maybe someone else has found some other better supplier, but if something cheap grenades into the system the OEM parts will look cheap by then.
Simon C
John C.
Senior Member
If the interior bits were rubbing it means the thrust bearings between them or the mounting points for those bearings are damaged and the impeller, turbine and stator should be replaced. My remark on overheating the convertor related to a way to abuse it. I think everyone will agree that overheating a transmission would be considered abuse. I'm surprised that this unit wasn't overheating all the time with that much leakage.
If you have damage to the internal parts of the torque converter it is always recommended by dealers and manufacturers to remove and at least inspect the converter cooler.
If you have damage to the internal parts of the torque converter it is always recommended by dealers and manufacturers to remove and at least inspect the converter cooler.
I havent actualy seen the parts yet. The mechanic said it looks like bearing had enough play to take out the seal and slight. Scoring on the others so we will change them also he said there not bad but while weere at it may as well change out. The cat was running fine had been pushing for days and in the snap of a finger flooded tc instatly.