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Pad Removal and Replacement
1-Remove paper retaining bolt (37)
2-Wedge dust fan with screwdriver or similar object
3-Use spanner wrench (Fig. 28) or punch and hammer (Fig. 29) to remove pad
Note: When replacing the old style steel pad with the new style aluminum the fiber washers between the
pad and lower bearing must be discarded.
Gearbox Removal and Repair
1-Remove pad (35)
2-Remove wall guard
3-Remove three screws (31) from gear cover (29)
4-Press jackshaft (23), gear (22) and bearing (20) assembly out of the cover using the paper retaining
screw to prevent damage to the shaft
5-Remove retaining ring (20) and press the jackshaft out of the gear and bearing
6-Remove retaining ring (25) and press bearing out of the cover
Reassembly
1-Press bearing (27) in cover using outer race only
2-Install seal (26) and Retaining ring (25)
3-Install key (24) and press gear (22) on jackshaft
4-Press bearing (21) on jackshaft using the inner race only
5-Install retaining ring (20)
6-Press the jackshaft assembly into the cover assembly by pressing on the upper end of the jackshaft
while supporting the inner race of the cover bearing
Pinion Gear Removal
1-Remove four screws (4) securing the field housing assembly
2- Remove field housing assembly by holding the handles and gently tapping down on the lower housing
(8)
3-Remove the dust baffles (72)
4-Pry the armature assembly up and out of the lower housing (Fig. 30)
5-Remove retaining ring (78)
6- Use gear puller to remove bearing (76) and pinion gear (77) from armature
Reassembly
NOTE: Lower gearbox assembly must be removed when reinstalling the pinion
1-Press bearing (76) and seal (75) in lower housing (8)
2-Press armature into the lower housing assembly
3-Install key (74)
4-Press pinion gear on armature
5-Reinstall the lower gear housing assembly
Armature Replacement
1-Remove four screws (4) securing the field housing assembly
2- Remove field housing assembly by holding the handles and gently tapping down on the lower housing
(8)
3-Remove the dust baffles (72)
4-Pry the armature assembly up and out of the lower housing (Fig. 30)
5-Remove pinion gear (77) and bearing (76)
