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OM-2031
8. Generator Maintenance
The 400-Hz generator requires no maintenance or service other than periodic cleaning. The unit is
brushless, and bearings are permanently lubricated and sealed.
WARNING ! Electric shock and fire can kill or injure! BE sure the unit is
completely dry before operating. Do not use a flammable solvent.
A. Cleaning
The generator may be cleaned by careful use of compressed air and/or a good, SAFE commercial
cleaner. Steam cleaning of the generator is no longer recommended because the use of steam and
harsh chemical compounds may result in damage to insulation and other generator components.
B. Adjustment
The generator itself requires no adjustment. Adjustment procedures for generator controls will be
covered in Section 2-3.
9. Drive Belts
Twin belts from the crankshaft pulley are used to drive the alternator and water pump. For proper engine
operation these belts should be in good condition and at proper tension at all times.
A. Checking Belt Tension
Check belt tension every 200 hours of engine operation, or biweekly. Belts which are too tight are
destructive to bearings of the alternator and water pump. A loose belt will slip and cause inefficient
operation of the alternator and/or the water pump.
To check belt tension, press each belt firmly with the thumb at a point halfway between the alternator
pulley and the crankshaft pulley. A properly adjusted belt should deflect about 3/8 inch.
B. Belt Adjustment
To adjust belt tension, loosen the alternator mounting bolts and change the position of the alternator.
Upon obtaining the correct tension, re-tighten both alternator mounting bolts.
When new belts are fitted, it is necessary to run the engine for a short period to allow the new belts to
settle into the grooves of the pulleys and thus show any initial stretching that is going to occur.
Recheck belt tension after running the engine and adjust as necessary. Twin drive belts should be
changed in pairs.
10. Trailer, Truck and Battery Maintenance
If the generator set comes with either the trailer or truck option, refer to Chapter 5 for the number of the
manual which covers the particular option. The manual referred to will provide the appropriate
maintenance procedure. Both manuals cover battery maintenance, as, when either option is used, the
batteries are installed within it.
2-1
Page 10
November 18/91 Revised
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