630 YRM 1003 Troubleshooting
5. Raise MDU slowly and insert steer shaft through
drive frame.
6. Install upper steer bearing, flat washer, lockwasher,
lock nut, and wire guard sleeve.
7. Torque steer bearing lock nut to 54 N•m (40 lbf ft).
Loosen nut and retorque to 34 N•m (25 lbf ft).
8. Bend locking tab into slot on bearing lockwasher.
9. Feed main wire harness through the spindle.
CAUTION
Be careful not
to damage the wiring when installing
the drive moto
r and brake assembly to the MDU.
10. Install drive
motor and brake assembly to MDU. See
the section B
rakes 1800 YRM 1005.
11. Mount drive w
heel on axle shaft; install washers,
and wheel bol
ts. Torque wheel bolts to 115 N•m
(85 lbf ft).
12. Install control handle. Refer to the section Steering
Mechanism 1600 YRM 1004.
13. Remove fill plug (41) and fill MDU to correct level
with gear oil. Install fill plug and torque to 40 N•m
(30 lbf ft).
14. Install two piece shield on the MDU using the four
Allen-head screws to secure.
15. Use the following procedure that applies to your lift
truck:
a. Install the lower drive unit compartment cover.
b. Install the lower drive unit compartment cover
and install the two screws to secure the cover
to the frame.
16. Install the upper drive unit compartment cover.
17. Lower truck and connect battery. Check for proper
operation before returning to service.
Troublesho
oting
PROBLEM POS
SIBLE CAUSE PROCEDURE OR ACTION
Lift truck w
ill not move.
Battery not
properly connected.
Check elect
rical connections.
Battery is d
ead.
Recharge or
replace battery.
Motor not o
perating.
Check wiri
ng or repair motor.
Damaged ge
ars or bearings.
Replace ge
ars or bearings.
MDU makes noise. The wrong lubricant is used. Drain incorrect lubricant and refill with
correct gear oil. Refer to Periodic
Maintenance 8000 YRM 1009, Peri-
odic Maintenance 8000 YRM 1379,
or Periodic Maintenance 8000 YRM
1048.
There is not enough lubricant. Fill with gear oil to proper level.
Dry or damaged bearings. Replace bearings.
Worn or damaged gears. Replace gears.
7
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