a.
Output cable plug connector
Check the output cable plug connection for damaged insulation and contacts each time the
connector is attached to an aircraft.
b.
Monitoring instruments
Check operation of voltmeter, ammeter and frequency meter each time the unit is started.
e. “B” Check and Operations (250 Hours or 3 Months)
(1)
Engine
a.
Check and record oil pressure
After each oil change, check and record oil pressure at idle speed after oil has warmed to
approximately 140º F (60º C). Record oil pressure under identical conditions at each oil
change interval. A comparison of pressure at idle speed with previous readings will give an
indication of progressive wear of oil pump, bearings, shafts, etc. Investigate any abnormal
change in pressure readings.
b.
Change fuel filters. Refer to 2-2; Para. 4.
c.
Clean radiator core. See 2-2; Para. 6, F for instructions.
d.
Check governor linkage
Check all attaching hardware. Check ball joints for wear and looseness. Check linkage for
free movement throughout its complete travel range.
(2)
Electrical (12-V DC system)
NOTE:
The battery furnished with this generator set is MAINTENANCE FREE.
a.
Battery electrolyte level (if applicable)
Battery electrolyte level must be maintained above top of plates. Add distilled water as
required.
DO NOT
overfill.
b.
Check battery
If battery requires water frequently, or is low in charge, the reason for the condition must be
found and corrected.
c.
Battery terminals
Check battery terminals and clean if necessary in accordance with Para. 3, B, (2) (a) above.
f. “C” Checks and Operations (500 Hours or 6 Months)
(1)
Engine
a.
Change crankcase oil. See 2-2, Para. 2, D, (4) for details.
b.
Change oil filter element each time crankcase oil is changed. See 2-2, Para. 2, D, (4) for
details.
(2)
Check and adjust drive belts
a.
See 2-2; Para. 7 for tension check and adjustment instructions.
CAUTION
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
Chapter 2-1
Page 7
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