PAGE 30 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
DEF Refueling
Diesel exhaust fluid
is an aqueous solution made with 32.5%
high puirty
urea
(carbamide) and 67.5
deionized water
. DEF
is used as a consumable in
selective catalytic reduction
(SCR) in order to lower NO
x
concentration from diesel exhaust
emissions.
1. Make sure engine is
OFF
.
2. Remove the filler cap from the DEF tank (Figure 34).
3. Upon initial start up,
completely fill
the DEF tank with
DEF fluid.
DO NOT
overfill.
Figure 34. DEF Tank Filling
DEF Refueling (Continuous Operation)
It is recommended to
shut down the engine
prior to refilling
the DEF tank. However, in special applications where shutdown
is not possible, it is recommended to
ONLY
refill the DEF tank
when the fluid level has been consumed down to 50%.
The DEF level sending unit requires a gradual DEF level
decrease during continuous operation to validate proper
operation. Failure of this sensor to report the decrease could
result in an engine shutdown. A engine service technician
would be required to remedy the shutdown.
NOTICE
ONLY
fill the DEF tank with
diesel exhaust fluid
. Any
other type of fluid may cause severe engine damage.
DEF
TANK
CAP
125
DEF FILLER
PORT
100
50
75
25
0
COOLANT (ANTIFREEZE/SUMMER COOLANT/
WATER)
Isuzu
recommends 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 12 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 13) 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 12. Coolant Capacity
Engine and Radiator
5.5 gal (21 liters)
Reserve Tank
N/A
Table 13. Coolant Capacity
Climate
Outside
Temperature
Longlife Coolant
Concentration
Warm
10°F (-12°C) or
Above
30%
Cold
-22°F (30°C) or
Above
50%
INSPECTION/SETUP
