DRIVE UNIT
Drive Unit
110
M3.0-1055-004
07 Rev. 10/09
Drive Unit Removal
Make sure lifting device is sufficiently rated to lift truck.
Keep all hands, feet etc. away from unit being raised.
Never work under or around a truck that is not properly
secured. Refer to truck Data Plate for truck weight in-
formation.
1. Disconnect the battery and chock drive tires. Refer
to Control of Hazardous Energy chapter.
2. Remove front power unit cover.
3. Remove the mast. Refer to "Removing Mast" pro-
cedures in the Control of Hazardous Energy sec-
tion of the service manual.
4. Block the power unit so drive tires are just off the
floor.
5. Disconnect all electrical connections to the traction
motor and brake.
6. Remove the drive tire and string guard (if
equipped). Refer to Drive Tire Replacement in this
section.
7. Support the weight of the drive unit while removing
the eight screws that secure the drive unit to the
chassis.
Drive unit is heavy, approximately 57 kg (125 lb), ex-
cluding motor, brake, gear lube and tire/hub assembly.
8. Remove the drive unit and take to a clean area as
needed for repair.
Drive Unit Installation
1. Install the drive unit to the chassis using the eight
screws.
2. Torque the screws to 339 Nm (250 ft lb).
3. Install the drive tire. Refer to Drive Tire Replace-
ment in this section for proper procedures and
torque specifications.
4. Reconnect all electrical connections to the motor
and brake. Torque traction motor power cable ter-
minal nuts to 23 - 24 Nm (17.0 - 17.7 ft lb).
5. Install the string guard (if equipped) and drive tire.
Refer to Drive Tire Replacement for proper proce-
dures and lug nut torque specifications.
6. Remove the power unit blocking.
7. Chock the drive tires.
8. Install the mast (reverse mast removal steps). Re-
fer to parts pages for screw/bolt torque specifica-
tions.
9. Replace the front power unit cover.
10. Connect the battery and remove the chocks.
Verify proper truck operation.
Crown 2007 PF15706-4 Rev. 10/09
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