Jack Maintenance; Trailer Wheel Bearings - Generac Power Systems MLT4200IF4 Owner's Manual

Maintenance

Jack Maintenance

The following procedures should be performed at least
annually: For side-wind models, the internal gearing and
bushings of the jack must be kept lubricated.
•
See Figure 4-4. Apply a small amount of
automotive grease (A) to the internal gearing by
removing the jack cover, or if equipped, use a
needle nose applicator or standard grease gun on
the lubrication point found on the side of the jack
near the crank. Rotate the jack handle to distribute
the grease evenly.
•
A lightweight oil (B) must be applied to the handle
unit at both sides of the tube for side-wind models.
•
If equipped, the axle bolt and nut assembly of the
caster wheel must also be lubricated with the same
lightweight oil.
•
For top-wind models, apply a lightweight oil to the
screw stem.
A
B
A
B
B
Figure 4-4. Jack Maintenance
36
A
B
B
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Trailer Wheel Bearings

The trailer axles are equipped with a grease zerk fitting to
allow lubrication of the wheel bearings without the need
to disassemble the axle hub. To lubricate the axle
bearings, remove the small rubber plug on the grease
cap, attach a standard grease gun fitting to the grease
zerk fitting and pump grease into the fitting until new
grease is visible around the nozzle of the grease gun.
Use only a high quality grease made specifically for
lubrication of wheel bearings. Wipe any excess grease
from the hub with a clean cloth and replace the rubber
plug when finished. The minimum recommended
lubrication is every 12 months or 12,000 miles (19,312
km). More frequent lubrication may be required under
extremely dusty or damp operating conditions.
Owner's Manual for MLT4200IF4 Light Tower