LCV [en-US]
28
8.3.1
Mounting the Bearings
WARNING
Care must be taken when handling heated components.
CAUTION
Use the bearing assembly drawing to determine if the bearing assembly uses the face to face or back to back
taper bearing arrangement.
1
Verify no gap here. Grind if
necessary.
Back to Back Taper Roller Bearing Face to Face Taper Roller Bearing
The bearing configuration is such that the thrust bearing must be removed in order to change the radial bearing. An
assessment should be made of the condition of the radial bearing at the time of any thrust bearing replacement since
later replacement of the radial bearing could damage an acceptable thrust bearing. Once the bearings are mounted,
they cannot be removed without risk of damage.
The radial bearing is mounted first. The bearings are press fitted to the shaft and should be heated to 120 °C (250 °F)
by a suitable bearing heater, oil bath, or other even heating device prior to mounting. Flame heating is not
recommended. When mounting, it is important that the bearings are seated fully against the abutting shaft shoulder.
Taper Bearing Locknut Assembly Torque
Mechanical
(Frame) Size
Locknut Assembly Torque
N-m
ft-lbs
1
135
40
2
200
80
3
270
200
4
680
500
8.3.2
Back to Back Thrust Bearing Installation
Heat inboard cone to 120 °C (250 °F) and install. Ensure that the larger OD of the bearing is towards the center of the
shaft.
Install spacer and bearing cup
A clip may be used to hold the cup in place.
Heat the outboard cone to 120 °C (250 °F) and install. Ensure that the larger outer diameter of the bearing is towards
the drive end of the shaft.
Before the taper roller bearing has cooled on the shaft, use the lock nut without lock washer to fully seat the bearing
against the shaft shoulder. (The lock washer must be left out during this step to prevent damage)
After the bearings have cooled, remove the locknut and reinstall with lock washer against the taper roller bearing,
tightening the nut according to the torque given in Section 8.3.1 "Mounting the Bearings".
After tightening, bend down one tab of the lock washer into one of the mating grooves on the locknut. If none of the
tabs are aligned with a groove, locate the nearest one, and further tighten the locknut until the tab can be bent down.
1
Summary of Contents for LCV
Page 40: ...LCV en US 40 14 Notes ...
