
116 SEBU8219-01
Maintenance Section
Jacket Water Heater - Check
i01917546
Jacket Water Heater - C heck
(Standby Gener
ator Sets (If
Equipped))
SMCS Code: 138
3-535
Jacket water heaters help to improve startability in
ambient tempe
ratures that are below 21 °C (70 °F).
All installations that require automatic starting should
have jacket water heaters.
Check the operation of the jacket water heater. For
an ambient temperature of 0 °C (32 °F), the heater
should maint
ain the jacket water coolant temperature
at approximately 32 °C (90 °F).
i02936695
Overhaul Co nsiderations
SMCS Code: 7595-043
Reduced hours of operation at full load will result in a
lower average power demand. A decreased average
power demand should increase both the engine
service life and the overhaul interval.
The need for an overhaul is generally indicated by
increased fuel consumption and by reduced power.
The following factors are important when a decision
is being made on the proper time for an engine
overhaul:
•
The need for preventive maintenance
•
The quality of the fuel that is being used
•
The operating conditions
•
The results of the S·O·S analysis
Oil Consumption as an Overhaul
Indicator
Oil consumption, fuel consumption, and maintenance
information can be used to estimate the total
operating cost for your Caterpillar engine. Oil
consumption can also be used to estimate the
required capacity of a makeup oil tank that is suitable
for the maintenance intervals.
Oil consumption is in proportion to the percentage
of the rated engine load. As the percentage of the
engine load is increased, the amount of oil that is
consumed per hour also increases.
The oil consump
tion rate (brake specificoil
consumption) is measured in grams per kW/h (lb per
bhp). The brake specific oil consumption (BSOC)
depends on the
engine load. Consult your Caterpillar
dealer for assistance in determining the typical oil
consumption rate for your engine.
When an engine’s oil consumption has risen to three
times the original oil consumption rate due to normal
wear, an engi
ne overhaul should be scheduled.
There may be a corresponding increase in blowby
and a slight increase in fuel consumption.
Using Fuel Consumption for Calculating
the Overhaul Intervals
Experience has shown that maintenance intervals
are most accurately based on fuel consumption. Fuel
consumptio
n corresponds more accurately to the
engine load. Table 16 lists average ranges of fuel
consumption and service hours for a load factor of
approxima
tely 60 percent.
Table 1 6
Service Hours and Fuel Consumption for
C32 EPG Power Modules
(1)
7500 Service HoursTo p E n d
Overhaul
946360 L (250000 US gal) of fuel
15000 Serv
ice Hours
Major
Overhaul
1892700 L (500000 US gal) of fuel
(1)
Fuel consumption is based on a load factor of approx imately
60 percent.
Use the actual records of fuel consumption, when
possible. If the actual records are not available, use
the following procedure in order to estimate the fuel
consumption.
1. Estimate the average percent of the load for the
operation of the engine.
2. Refer to the fuel consumption data in the Technical
Marketing Information (TMI) for your engine. This
will determine the fuel consumption for the percent
of the load that was estimated in Step 1. Use this
figure as variable “F” for the equation in Table
17. For more information about the Technical
Marketing Information (TMI) for your engine,
consult your Caterpillar dealer.