Chapter 8: Maintenance
lightly with a rubber mallet on the inside face.
7.
Clean the bolts and the threaded holes with a small amount of isopropyl alcohol to
remove any loose cured thread locking fluid..
8.
Align the bolt-holes on the replacement wheel with the threaded holes in the axle hub
and push the replacement wheel onto the hub.
9.
Apply a drop of threadlocking fluid to each M6 bolt and fasten the bolts by hand, fin-
ger-tight.
10.
Lower the LD-250 to the floor so that the drive wheel touches the floor in its normal
driving position.
11.
Use an M4 hex key to hand-tighten each bolt only two turns each in the cross-wise pat-
tern (D). Tighten until the wheel is completely mounted on the hub, up to the hub
flange.
12.
Torque each M6 bolt to 11.8 N·m (8.7ft-lb) using quarter-turns in a cross-wise pattern
(D).
13.
Repeat Step 2 to Step 12 for the second drive wheel.
Replace Front or Rear Casters
Examine the casters every 3 months, and replace them if they show signs of cracking, excess-
ive wear or damage. When operating on the recommend floor surface, the service life of the
caster exceeds 10,000 km (6200 miles).
Measure the diameter of the casters. When new, the casters are 127 mm (5.0 inches). The max-
imum permissible wear is 3.05 mm (0.012 inches).
Replacing a Caster Wheel
If the wheel or wheel bearing is worn or damaged you can replace only the wheel. All four
caster wheels are identical, and are mounted in the same way.
You require
l
Replacement caster wheel P/N
l
Two 19 mm wrenches or sockets.
20472-000 Rev B LD-250 Platform User's Guide 171
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