User's Manual

PAGE 32 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
COOLANT (ANTIFREEZE/SUMMER COOLANT/
WATER)
ISUZU recommends ISUZU antifreeze/summer coolant for
use in their engines, which can be purchased in concentrate
(and mixed with 50% demineralized water) or pre-diluted. See
the ISUZU Engine Owner’s Manual for further details.
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 10 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 11) has been added.
WARNING
If adding coolant/antifreeze mix to the
radiator, DO NOT remove the radiator cap
until the unit has completely cooled. The
possibility of hot! coolant exists which can
cause severe burns.
Table 10. Coolant Capacity
Engine and Radiator 14.3 Gal (54 liters)
Reserve Tank 1.3 Gal (4.92 liters)
Table 11. Anti-Freeze
Operating Temperatures
Vol %
Anti-Freeze
Freezing Point
°C °F
50 -37 -34
NOTICE
When the antifreeze is mixed with water, the antifreeze
mixing ratio must be less than 50%.
Cleaning the Radiator
The engine may overheat if the radiator fi ns become
overloaded with dust or debris. Periodically clean the
radiator fi ns 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
insuffi cient charging of the battery. Inspect the fan belt for
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 33) when depressed with the thumb as shown
below.
Figure 33. Fan Belt Tension
CAUTION
NEVER place hands near the belts or fan
while the generator set is running.
INSPECTION/SETUP