Electrical System (115-V Ac); Monitoring Instruments; Indicating Lights; Protective Modules - Hobart 60PL20 Operation And Maintenance Manual

OM-2053

4. Electrical System (115-V AC)

The 400-Hz generator and controls are designed to be as maintenance free as possible. No lubrication is
necessary and no periodic maintenance adjustments are required. However, some regular checks should
be made to be sure all controls, instruments, etc., are working properly.
A. Monitoring Instruments
Observe operation of voltmeter, ammeter, and frequency meter each time the unit is started.
B. Indicating Lights
Check lamps (bulbs) in all of the indicating lights at each start up. Fault indicating lights on the front
panel of the control box may be tested by pressing test switch (1-1; 16, Fig. 6) .
C. Protective Modules
Check operation of all protective modules to make certain they will function if a fault should occur in
the output circuit. (See 2-3; Para. 3, B.)
D. Wiring and Connections
WARNING: Stop operations and stop engine before touching exposed conduc-
tors or terminals.
(1) Check all cables, leads, and wiring for broken, worn, and damaged insulation.
(2) Check all connections for tightness.
(3) Check the output cable plug connector for damaged contactors in the end of the plug.

5. Trailer

If the generator set comes with the trailer option, perform inspection as follows:
A. Check operation of parking brakes.
B. Check fuel tank for leaks.
C. Check pressure in all four tires. Should be 95 psi.
D. Check reflectors for damage.
E. Check trailer axles, linkage, and wheel bearings for proper lubrication. (Refer to Section 2-1, Para. 3,
F.) Refer also to TO-186 in Chapter 5 of this manual.
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December 31/91 Revised