Blower Repair & Maintenance Manual #34-05198-6 v1.2 11.2014
20
BEARING AND GEAR REPLACEMENT ON GEAR HEAD UNITS
Fig. 18
When excessive wear has spent the effectiveness of any one of the three bearings and/or two gears in
gear head units, it is recommended that all five components be replaced to assure optimum
performance and trouble-free service. Installation of a new oil seal is recommended each time the unit
is disassembled.
DISASSEMBLY
STEP
PROCEDURE
1.
Unbolt the gear box cover (
A
) and the adapter (
B
) from the impeller case by removing all
exposed socket head cap screws (
C
). Detach the cover from the adapter. Note: At this
point on some units, four socket head cap screws may be seen on the exposed end of
the headplate (
D
).
Do not remove these screws.
2.
Remove the button head cap screw (
E
) and the retainer plate (
F
) from the impeller shaft
(
G
).
3. Attach a standard gear puller to the pinion gear and remove both the gear and the
bearing from the impeller shaft in one operation.
4.
Withdraw the retaining ring which secures the outer race of pinion bearing (
H
) in the gear
box cover. Use a gear puller or similar tool remove the outer race.
5.
Remove the input shaft assembly (
J
) from the gear box adapter.
6.
Use a press with a support on the gear surface to drive the input shaft out of the gear and
bearing. Reverse the shaft assembly and repeat this procedure to press the shaft out of
the other bearing.
7.
Remove the oil seal by drifting it out of the gear box cover.
