Hobart 120CU20, Operation And Maintenance Manual With Illustrated Parts List

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OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
October 15, 2013 Chapter 2-1
Page 8
f) “C” Checks and Operations (500 Hours or 6 Months).
(1) Engine.
a Check Engine and Generator Mounts.
CAUTION
An unstable or loosely mounted engine can create hazardous environment and may
damage equipment.
(i) Engine mount bolts must be torqued to 122 N-m (90 ft-lb.).
(ii) Generator mount bolts must be torqued to 122 N-m (90 ft-lb.).
b Change oil and oil filters.
c
Change all fuel filters.
d
Check Coolant Additive Concentration.
The cooling system protective liquid (nitrite-, amine- and phosphate free) provides effective
protection against corrosion, cavitation, and freezing. See engine manufacturer’s operation
manual for ordering and mixture details.
(2) Electrical (12 VDC system).
a Wiring.
Inspect all cables and leads for worn or damaged insulation.
b Connections.
Inspect connectors for damaged or corroded condition.
(3) Electrical (400 Hz System).
a Protective Monitoring Circuits.
Check operation of all protective monitoring circuits to make certain they will function if a fault
should occurs in the output circuit. Procedures for testing these circuits are contained in the
Adjustment/Test section of this manual.
b Inspect Wiring and Connections.
Check all cables, leads, and wiring for broken, worn and damaged insulation. Check all
connections for tightness.
c Clean and inspect generally.