The regreasable bearing has a single shield. Make sure that the bearing is installed with the shield
away from the impeller.
The duplex bearings are mounted back-to-back. Make sure that the orientation of the bearings are
correct.
a) Inspect the shaft (122) to ensure that it is clean, dimensionally correct, and is free of nicks and
burrs.
122
112
136
Figure 107: Shaft inspection
b) Lightly coat the bearing seating with a thin film of oil.
c)
Remove the bearings (112) from their packaging.
d) Wipe the preservative from the bearing (112) bore and outer diameter.
e) Use an induction heater with a demagnetizing cycle to heat both bearings (112) to an inner ring
temperature of 110 °C | 230 °F.
f)
Place both bearings (112) on the shaft (122) with the large outer races together (back-to-back).
g) Position the bearings (112) on the shaft (122) against the shoulder and snug the locknut (136)
against the bearings until they are cool.
The locknut prevents the bearings from moving away from the shaft shoulder as they cool. Rotate
the outer bearing rings relative to each other as they are placed on the shaft to assure good align-
ment.
h) Remove the bearing locknut (136) after the bearings (112) are cool.
5.
Put the lockwasher (382) onto the shaft (122).
6.
Thread the locknut (136) onto the shaft (122) and tighten it until it is snug.
7.
Bend the tangs of the lockwasher into the slots of the locknut.
8.
Coat the inner surfaces of the bearings with lubricant.
9.
Put the inboard bearing (168) onto the shaft (122).
122
168A
248A
112A
136
382
253B
Figure 108: Inboard bearing reassembly
10. Install the bearing housing as follows (see the illustration):
a) Coat the outside of the outboard bearing (112A) with oil.
6.6 Reassembly
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual
117
