Hobart 9OC24S Operation Manual page 128

OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPECS. NO. 5381A
lubricate more frequently under severe operating conditions such as: low engine
temperature, high oil temperatures, intermittent operation, dust, etc. However,
time intervals should not exceed those indicated in the chart without careful
evaluation .
Although both hours of operation and calendar intervals are included in the Sym-
bols and Time Interval Chart, Figure 3, maintenance MUST be based on HOURS
OF OPERATION. The calendar intervals are included only to make certain
maintenance services are performed regularly when the equipment is operated
less than normally.
(2) Oil specification
Engine lubricating oil, recommended by the engine manufacturer, is identified
by an API (American Petroleum Institute) classification designation. The man-
ufacturer does not recommend any specific brand of lubricating oil.
The use of quality lubricating oil, combined with appropriate lubricating oil
drain and filter change intervals are important factors in extending engine life.
Oil recommended for the mode I V-504-C210 engine in this application is API
Class CC with a maximum ash content of 1.85%. An oil with NO ash content
is NOT recommended.
CAUTION: HIGH ASH OILS MAY PRODUCE HARMFUL DEPOSITS ON
VALVES THAT CAN CAUSE VALVE BURN IN G.
Lubricating oil is discussed in detail in the Cummins Operation and Maintenance
Manua I.
(3) Oil viscosity
A temperature and oil viscosity index chart is provided in Figure 5.
Ambient Temperatures
-.
-10 to 30 deg F (-23 to -1 deg C)
20 to 60 deg F (-7 to 16 deg C)
40 deg F (4 deg C) and above
Viscosity
low
20 - 2ow
30
J
Temperature and Viscosity Chart
Figure 5
2-2
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