Hobart 9OC24S Operation Manual page 292

GENERATOR DIVISION
HOBART BROTHERS COMPANY
OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
(2) Fan and coupling assembly
(a) Inspect the complete assembly for evidence of physical damage and fatigue
cracks. Inspect rubber bushings for evidence of fatigue and overheating.
(b) Replace defective parts as required. Rubber bushings cannot be replaced
individually. Replace the complete coupling disc with bushings installed,
' if replacement is required.
CAUTION: THE COMPLETE FAN AND COUPLING ASSEMBLY
MUST BE BALANCED TO WITHIN l/2 OUNCE BEFORE
INSTALLATION ON THE GENERATOR.
(3) Exciter rectifier assembly
(a) Inspect for cracks, broken welds, and other physical defects.
(b) Check security of all parts.
(c) Test each diode in accordance with 2-3, Para. 2, C.
(4) Rotor assembly
(a) Visually inspect the assembly for physical damage. Inspect visible welds
for breaks or fatigue cracks.
(b) Inspect insulation on leads and windings.
,(c) Check windings in accordance with 2-3, Para. 2, D.
(5) Generator and exciter stators
(a) Visually inspect stators for physical damage, and inspect welds for cracks
or breaks.
(b) Inspect all wire leads for damaged insulation or broken or frayed wires at
the terminal ends.
(c) Check windings in accordance with 2-3, Para. 2, D.
F.
Bearing Installation
If bearings were removed, new ones must be installed prior to reassembly of the
generator. Bearing installation is one of the most critical operations in the overhaul
of the generator set.
Improper installation practices and procedures can only result
in shortened bearing-life and premature- failures.
6-l
Ott 30/73
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