Brother FAX4100 Service Manual page 76

NOTE: When setting the heater roller to the upper FU frame, fit the two ribs of the bushing
25 onto the bosses provided on the FU frame as shown below.
Bushing 25
Boss
NOTE: At the gear side of the heater roller, fit bushing 25 onto the heater roller with the 0.5
mm thick boss facing UP. At the opposite side, fit bushing 25 onto it with the 0.5 mm thick
boss facing DOWN.
HR gear 25
Boss (0.5 mm thick)
facing up
HR gear 34
Bushing 25 Heater roller
IV - 35
Rib
Heater roller
Heater roller Bushing 25
[Boss (0.5 mm thick)
facing down]