MITSUBISHI 4M50 TIMING GEARS AND BALANCE SHAFTS Removal procedure Removal: Balance shaft • Remove the balance shaft RH by turning its nut counterclockwise, and the balance shaft LH by turning its nut clockwise.
Inspection procedure Inspection: Idler gear bushing-to-idler shaft clearance • If the measurement exceeds the specified limit, replace the bushing.
Replacement of idler gear bushing [Removal]
[Installation] • Place the idler gear with its ends facing as illustrated. • Press-fit the idler gear bushing until sits snugly on the chamfered end of the idler gear. • After press-fitting the bushing, measure the clearance. • If the measurement is less than the minimum of the standard value range, ream the idler gear bushing until the clearance falls within the standard value range.
Inspection: Fan shaft case bushing-to-fan shaft clearance • Replace the fan shaft case bushing if the measurement exceeds the specified limit.
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