Jack Maintenance; Trailer Wheel Bearings - Generac Power Systems MAGNUM MTT15 Operating Manual

Combination light tower generator & water trailer
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Check Motor Brushes
Visually Check Winch And Control
MECHANICAL BRAKE
The mechanical brake generates heat when loads are lowered and the wire cable is powered out. Care must be
taken to avoid overheating the mechanical brake.
Whine or chatter associated with a new mechanical brake is normal and typically disappears with use.
Overheating the mechanical brake may result in permanent damage to, or failure of, the brake. Replace any damaged
brake components before resuming use of the winch.

JACK MAINTENANCE

The following procedures should be performed at least annually.
SIDE-WIND MODELS
The internal gearing and bushings of the jack must be kept lubricated. Apply a small amount of automotive
grease 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 must be applied to the handle unit at both sides of the tube.
If equipped, the axle bolt and nut assembly of the caster wheel must also be lubricated with the same
lightweight oil.
TOP-WIND MODELS
Apply a lightweight oil to the screw stem.
Oil
Grease

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.
30
Grease
Grease
Oil
Oil
Oil
Oil
00243

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