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 1
Chapter 2 Service and Troubleshooting.
Section 1 Maintenance Inspection/Check.
1) General.
To make certain the generator set is always ready for operation, it must be inspected and maintained
regularly and systematically so that defects may be discovered and corrected before they result in serious
damage to components, or failure of the equipment.
WARNING
STOP operations at once if a serious or possibly dangerous fault is discovered.
2) Maintenance Schedule.
a) General.
A periodic maintenance schedule should be established and maintained. A suggested schedule is
provided in Figure 1 on the following pages. It may be modified, as required to meet varying
operating and environmental conditions. It is suggested that generator set and vehicle inspections be
coordinated as much as possible.
b) Maintenance Schedule Check Sheet.
It is strongly recommended that the customer use a maintenance schedule check sheet such as the
one in engine manufacture’s operation manual. The check sheet will provide a record and serve as a
guide for establishment of a schedule to meet the customer’s maintenance requirements for his
specific operation.
c) Time Intervals.
The schedule is based on both hours of operation and calendar intervals. These two intervals are not
necessarily the same. For example, in normal operation the oil change period, based on hours of
operation, will be reached long before the three months calendar period. The calendar period is
included to make certain services are performed regularly when the equipment is stored, or being
operated infrequently. Lubricating oil standing in engines that are stored, or used very little, may tend
to oxidize and may require changing although it is not dirty. Perform all services on whichever-comes-
first basis.
d) Identification of Interval Periods.
Each interval period is identified by a letter A, B, C, etc. For example, services under B schedule
should be performed at the end of each 250 hours of operation, or every three months, BR service is
performed during the BREAK IN period (first 50-150 hours) and AR service is performed AS
REQUIRED.