Are there seperate clutches for each range HLR and where are the seals/manifold located that you mention. I have never pulled anything apart on one of these and frankly don't know where to starrt with this problem. It doesn't have anything to do with Hyd pressure or the lack of enough pressure at a lower RPM?
Thanks for your help
you may want to consult a service manual to see if theres a test port to check clutch pressure, i really dont remember.
there are 3 clutch packs in the trans, all on a common shaft, with the manifold on the rear of the shaft, sealed with steel sealing rings.
sounds easy huh?
not really.
tip the rad shell fwd
remove the engine and rad support
remove the dash console
remove the bellhousing
remove top cover of trans
remove bearing quills on the countershafts from the front of the trans
remove the 3 bolts and lock ring from the ring gear side of the housing.
clutches and manifold lift out of the HLR housing.
may have bad sealing rings, or a leaking clutch piston seal(s)
one question, at full throttle is the gear change from fwd to rev "lagging" or do you have a firm hard shift?
on the RH side of the trans, theres a large pipe plug, inside the trans under that plug is the rate of shift screw.
that screw varies the speed of fwd to rev shift, if it's turned too far in, it can cause a slow shift, but it should effect all shifts, not just low.
it's been 20 years since i worked on these dozers every day, my memory is a little foggy.
:drinkup