D4 78A direct drive, just got it home. Am having trouble shifting into forward, much gear clash. Shifts into reverse okay. If on an incline and the machine rolls slightly forward, it will usually go into gear but, with a slight snick of gear teeth. Had to kill the engine several time to engage forward. Seemed to be better once warmed. If it wasn't for the shift to reverse seemingly being okay I'd say the clutch wasn't fully disengaging.
shove your clutch lever forward firmly and the clutch break should stop the trans and it should go right into gear if not the the clutch break is out of adjustment and you will need a book or maybe someone else can tell you how to adjust it.
Is it a dry or oil clutch unit? There are adjustments for the clutch/transmission brake (if it's not worn out) and the interlock mechanism. Oil clutch does tend to drag a little, especially when cold. Probably should adjust the clutch also while your in there. Best to get the service manual. Can usually find them on ebay.
Okay, thanks guys! I was curious as to whether a clutch brake such as I remember in a big truck was used.