Operation Manual – ITW GSE 6400 Tier 3
7) Engine Drive Belt
a) General
The engine cooling fan, alternator, and water pumps are driven by one serpentine belt, which
must be replaced if worn or damaged.
b) Preparation for Belt Check and Adjustment
All driven assemblies must be securely mounted in operating position before checking belt
tension.
c) Checking Belt Tension
WARNING
DO NOT Check belt tension with engine running
Check belt tension every 1000 hours, or once year, whichever comes first. A belt that is too tight
is destructive to bearings of the driven part. A loose belt will slip and cause inefficient operation of
the part being driven as well as wear to the belt.
CAUTION
Inspect and replace the belt if it has unacceptable cracks, is frayed, or has pieces of
material missing.
Belt tension may be checked by manually depressing the belt with an index finger to determine
the amount of belt deflection obtained. When a force is applied at a point halfway between
pulleys on the longest span of a belt, there should be no more than 1/2 inch of deflection attained.
Refer to the engine manufacturer’s operation manual for checking belt tension and changing worn
belts.
8) Generator Maintenance
The 400 Hz generator requires no maintenance or service other than periodic cleaning. The unit
is brushless and has bearings that are permanently lubricated and sealed.
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 not recommended because the use of
steam and harsh chemical compounds may result in damage to insulation and other generator
components.
WARNING
Never use solvents as this is a fire hazard
b) Adjustment
The generator itself requires no adjustment. Adjustment procedures for generator controls are
covered in Section 2-3.
OM2254 Rev A
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