Use and Care Manual

Tsurumi’s Operation, Service, and Repair Manual
Removal/Installation
65
6-14 Replacement of Rotor Bearing
NOTE: Refer to exploded view in Replacement Parts section for parts information. The item numbers
in the following procedure are identical to those in the Replacement Parts exploded views.
A. Remove the generator rear cover (7). (Refer to Replacement of Stator for removal
instructions.)
NOTE: Make sure the diameter of the bearing puller threaded rod is larger than the threaded bore in
the center of the rotor shaft.
1. Install a three-jaw gear or bearing puller on the rotor shaft. Make sure all three jaws are under
the outer race of the bearing (refer to Figure 6-9).
2. Rotate the threaded rod of the bearing puller and remove the bearing (13) from the rotor shaft
(12).
3. Pre-heat an oven to 350° ± 25° Fahrenheit. Place the replacement bearing (13) in the oven
for 30 minutes.
WARNING: TO AVOID BEING BURNED BY THE HEATED BEARING, WEAR THERMAL-
INSULATED GLOVES.
4. Wear insulated gloves and remove bearing from the oven. Immediately place the bearing on
the rotor shaft. Make sure the bearing is seated against the shoulder of the shaft.
5. Let the bearing cool to room temperature.
6. Check the bearing for free rotation.
7. Install the rear cover (1). (Refer to Replacement of Stator for rotor installation instructions.)
6-15 Replacement of Rotor
8. The generator stator (6, Figure 6-0) must be removed before the rotor (12) can be removed.
Refer to Replacement of Stator for stator removal instructions.
NOTE: The rotor (12, Figure 6-9) at this point is free to rotate and must be kept from rotating to enable
removal of the through bolt (11).
9. Restrain the rotor to keep it from rotating.
10. Put a box-end wrench on the hex of the through bolt (11).
11. Using a plastic, rubber, or other soft-faced hammer, strike the side of the wrench using sharp
blows to loosen the through bolt (11).
12. When the through bolt (11) is loosened, it can easily be removed.