what oil are you running in the transmission?
I'd take a good look at which discs were supplied last time. Some aftermarket are inferior.
Water is the enemy of the clutch linings in the smaller 'century line' machines and condensation over a long period is enough to make them de-laminate, change the oil regularly to help stop this sort of damage happening.
The machine has always had a 30 weight trans oil, but i had never noticed milky fluid. Are other machines this susceptible to friction disc failure, not related to wear. If looking at a used dozer it would be almost impossible to spot this type of failure, which is why I'm a lttle leary of powershift machines. there is a decent D4d for sale near me, which is quiet a bit older and has many more hrs. Are they prone to this sudden delamination of friction material.
Found the same issue on the steering clutch linings on a d4e (wet back end) that had been standing a long time before I bought it. Worked fine for 50-60 hours after which clutches started slipping. Pulled apart to find the linings coming apart from the discs. Suspect that Catsilver on it with water contamination or maybe poor quality aftermarket parts.
Steering clutch discs should be sintered bronze face that don't delaminate.
The D3 series seems to be a condensate maker and are famous for leaking covers.
Should be using SAE30 TDTO (type TO-4).
All machines larger than the D3/931/910 used sintered bronze clutch plates, any different are probably aftermarket and it was only the earlier machines that suffered this problem.
perhaps you guys could help me with my D3B--since I bought it about 5 years ago every once in a while when i put it in 1st reverse there is nothing--go back to 1st forward and then back to reverse it engages--or put it in 2nd reverse and it engages--had changed the oil,filters and screen and fluid is not milky---adjusted the linkage according to the service manual also---got me baffled! :noidea:
1987 D3B--27Y03729
I think you'd have to run a series of pressure tests to sort that one out.
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