I recently replaced the inching and master brake cylinders on a CLARK CMP25L fork, now the operator complains that the brakes are binding.. stops the fork, and prevents its moving until the unit has "cooled down".

Quoting the operator - "the brakes seize and become tight at the pedals when the fork gets hot"

I'm thinking this issue is with the inching brake and not the wheel/drum brakes. I also notice that the transmission fluid get really hot real quickly - even after a short operation. Can spent transmission fluid cause this problem? Is it that the radiator coolant passes are getting blocked?

There's no complaint or evidence of engine overheating.