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MF165 tachometer and oil leak

G. Wright I recently purchased a MF165 and the tachometer spins round and round. Why? Also right under where the TAC screws in, there is a small hole and it is leaking oil. Why?
The engine is the Perkins AD4.203

GEEBEE Sounds like the tractometer is broken. The oil leak at the block can be fixed by removing the cable, then the cap and installing a new seal and gasket, the seal fits inside the cap.
G. Wright Replaced the seal and gasket, oil still leaking out of the little hole below where the TAC screws in.
GEEBEE Presuming you were given the correct seal Perkins part# 30854 / MF# 636762M1 and you installed it with the garter spring towards the engine, it could be the coupler shaft has a groove worn in it and needs replaced. There is also an inner seal at the end of the camshaft but i cain't remember if this is accessible
bill When you installed the new seal you most likely fliped the spring off of the seal. if you slip a socket into the seal before you install it, this will expand the seal to allow an easier install.

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