Drive Motor; Removal; Disassembly; Inspection - JLG E450A Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

3.6 DRIVE MOTOR

Removal

1. Place machine on the firm level surface.
2. Disconnect the battery power and all electrical connec-
tions from the drive motor.
NOTE: The drive motor weighs approximately 95 lbs. (43 kg).
3. Use suitable lifting device to support the drive motor.
4. Remove four bolts attached drive motor to the frame.
5. Remove the motor from machine and place in a clean
work area.
6. Clean the motor for dirt. Remove rust or corrosion from
coupling shaft.

Disassembly

NOTE: Refer to Figure 3-20., Drive Motor.
1. Place the motor in a soft jawed vice, with coupling shaft
from motor pointing down and the vise jaws clamping
firmly to the sides of the end shield (8).
IF THE MOTOR IS NOT FIRMLY HELD IN THE VISE, IT COULD BE DISLODGED
DURING THE SERVICE PROCEDURES, CAUSING INJURY.
2. Remove the three nuts (4) and relevant washers (5) from
the terminal board (3).
3. Remove the terminal board (3) from the terminal base
(6).
4. Remove the screws (7). Make sure that the screws are
not damage.
5. Remove four screw (35) that attach the drive brake (36)
onto the drive motor. Remove the drive brake.
6. Remove the terminal base (6) from the stator (2).
7. Remove the temperature sensor (27) from the stator (2).
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8. Remove the screws (22) from the retaining plate (23).
9. Remove the retaining plate (23) from the cover (21).
10. Remove the cover (21) from the shield end (18).
11. Remove the seals (20) and (19).
12. Disconnect the connector (34) from the sensor (13).
13. Remove the sensor (13) from shield end.
14. Remove four screws (26) attached to the drive end plate
(8).
15. Remove end plate and shield end.
16. Remove the Shaft Seal (10). To avoid damaging the shaft
during removal, install a large sheet metal screw into the
chuck of a slide hammer. Drive the screw into the seal
surface and use the slide hammer to pull the seal.
17. Remove Washer (12), O-ring (9) and Bearing from Stator
(2).
18. Remove the retainer clips (31) and (30).
19. Remove the Bearing (24), O-ring (28) and retainer clip
(25).
20. Use mallet to remove the Gear (33) and remove Gear Key
(32) from the Rotor (29).
21. Remove the rotor (29) from the stator (2).
22. Remove the stator (2).
23. Keep all parts in a clean work area.

Inspection

Inspect the new seal, the motor housing seal bore, and the
sealing area on the shaft for rust, wear, and contamination.
Polish the shaft and clean the housing if necessary.
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