GMC 1976 ZEO 6083 Maintenance Manual page 723

24C- 4 6 ONAN MOTOR GENERATOR
GENERATOR BEARING
The generator is prelubricated and double-sealed.
Replace bearing approximately every 5 years or at
each engine overhaul .
WITH ONE AMPERE INPUT THE
VOLTAGE SHOULD READ
VOLTAGE
Figure 88-Testing Compounding Reactor
Figure 89-AC Generator Schematic
COMPOUNDING REACTOR
If output voltage is high with no electrical load
connected to the generator, with generator running
at 1800 rpm, then the compounding reactor is proba
bly defective. Test as shown in Figure 88, using a
Variac .