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DCA20SPXU2 (WITH MLT20 SERIES) • OPERATION AND PARTS MANUAL — REV. #0 (01/18/13) — PAGE 29
Day-to-day addition of coolant is done from the recovery
tank. When adding coolant to the radiator, DO NOT remove
the radiator cap until the unit has completely cooled. See
Table 9 for engine, radiator, and recovery tank coolant
capacities. Make sure the coolant level in the recovery tank
is always between the “H” and the “L” markings.
Operation in Freezing Weather
When operating in freezing weather, be certain the proper
amount of antifreeze (Table 10) has been added.
CLEANING THE RADIATOR
The engine may overheat if the radiator fins become
overloaded with dust or debris. Periodically clean the
radiator fins with compressed air. Cleaning inside the
machine is dangerous, so clean only with the engine turned
off and the negative battery terminal disconnected.
AIR CLEANER
Periodic cleaning/replacement is necessary. Inspect it in
accordance with the ISUZU Engine Owner’s Manual.
FAN BELT TENSION
A slack fan belt may contribute to overheating, or to
insufficient charging of the battery. Inspect the fan belt for
Table 9. Coolant Capacity
Engine and Radiator 1.74 gal (606 liters)
Reserve Tank 0.26 gal. (1 liter)
Table 10. Anti-Freeze Operating Temperatures
Vol %
Anti-
Freeze
Freezing Point Boiling Point
°C °F °C °F
50 -37 -34 108 226
NOTICE
When the antifreeze is mixed with water, the antifreeze
mixing ratio must be less than 50%.
damage and wear and adjust it in accordance with the
ISUZU Engine Owner’s Manual.
The fan belt tension is proper if the fan belt bends 10 to 15
mm (Figure 21) when depressed with the thumb as shown
below.
Figure 21. Fan Belt Tension
BATTERY
This unit is of negative ground DO NOT connect in reverse.
Always maintain battery fluid level between the specified
marks. Battery life will be shortened, if the fluid level are
not properly maintained. Add only distilled water when
replenishment is necessary.
DO NOT over fill. Check to see whether the battery
cables are loose. Poor contact may result in poor starting
or malfunctions. Always keep the terminals firmly
tightened. Coating the terminals with an approved battery
terminal treatment compound. Replace battery with only
recommended type battery.
The battery is sufficiently charged if the specific gravity
of the battery fluid is 1.28 (at 68° F). If the specific gravity
should fall to 1.245 or lower, it indicates that the battery is
dead and needs to be recharged or replaced.
Before charging the battery with an external electric source,
be sure to disconnect the battery cables.
CAUTION
NEVER place hands near the belts or fan
while the generator set is running.
INSPECTION/SETUP