My boat has a Hurth HBW 250
transmissions (ZF 25M) that is some 25 years old. Last week I belive that I damaged the unit by accidently leaving in forward gear
while sailing for about 8 hours.
When I discovered that unit was in forward, I shifted into reverse, but with much difficulty. Since then, the transmission
is very hard to shift (very stiff at lever) and has on a couple of occasions failed to shift into reverse (linkage "clicks" as if going into reverse, but does not engage).
I have drained and replaced ATF fluid in transmission
(four times!) and still see the drained oil
very muddy and with metalic dust in fluid. Assume that this is from bronze clutch
plates being chewed up.
I have about 16 hours of run time on transmission since the screw-up (and before changing oil). But at this point, 90% of time the transmission will shift into forward/neutral/reverse positions, although with some extra effort at shift lever.
If I rebuild
transmission with new clutch
plates can I expect normal operation to return? Or have I really screwed up and have no choice but to get a new transmi$$ion?
Would love replies from those who have rebuit these units in the past. Thanks.