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Blower Repair & Maintenance Manual #34-05198-6 v1.2 11.2014
21
Bearing and Gear Replacement on Gear Head Units (con’t)
ASSEMBLY
STEP
PROCEDURE
1.
Coat the input shaft and drive shaft with white lead. Oil all other components.
2.
Replace the key on the input shaft. Press (or drive with a lead hammer) the gear into the
input shaft until it is centered on the shaft step.
3.
Replace both bearings on the shaft to their respective positions on either side of the gear.
This step is facilitated by placing a mating sleeve over the O.D. of the shaft and carefully
driving the bearings into position.
4.
Drive the outer race of the pinion gear bearing into its seat in the gear box cover and
replace the retaining ring.
5.
Replace the key on the impeller shaft and press (or drive with a lead hammer) the pinion
gear onto the shaft until it is seated against the spacer.
6.
Drive the inner race of the pinion gear bearing onto the impeller shaft.
7.
Replace the retaining plate and the button head cap screw on the end of the impeller
shaft.
8.
Coat the mating flanges of the gear box cover, gear box adapter and headplate with
liquid gasket cement.
9.
Place the blower in a vertical position and set the gear box adapter into place.
10.
Install the input shaft assembly into the gear box adapter.
11.
Install a new oil seal in the gear box cover.
12.
Place a piece of shim stock around the input shaft to avoid damaging the oil seal
13.
Place the gearbox on the adapter. Use caution to avoid damaging the oil seal or gears.
14.
Replace all cap screws.