MQ Power WHISPERWATT DCA150SSJU4F2 Operation Manual page 41

3. NEVER overfill the fuel tank — It is important to read
the fuel gauge when filling the trailer fuel tank. DO NOT
wait for fuel to rise in the filler neck (Figure 41).
FUEL GAUGE LOCATED
ON GAUGE UNIT ASSEMBLY
Figure 41. Full Fuel Tank
CAUTION
DO NOT OVERFILL the fuel system. Leave room for
fuel expansion. Fuel expands when heated (Figure 42).
Fuel EXPANDS
When Heated!
Figure 42. Fuel Expansion
DEF Refilling
NOTICE
ONLY fill the DEF tank with diesel exhaust fluid. Any
other type of fluid may cause severe engine damage.
Diesel exhaust fluid is an aqueous solution made with
32.5% high-purity urea carbamide and 67.5% deionized
water. DEF is used as a consumable in selective catalytic
reduction (SCR) in order to lower NO
diesel exhaust emissions.
1. Make sure the engine is OFF.
2. For DCA150SSJU4F2 generators open the enclosure
rear door and remove the filler cap from both DEF
tanks and fill with DEF fluid (Figure 43).
3. For DCA150SSJU4F3 generators open the DEF
access door (Figure 44) remove filler cap and fill with
DEF fluid.
4. Before initial start-up, completely fill the DEF tank
with DEF fluid. DO NOT overfill.
DCA150SSJU4F2/F3 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (02/16/22) — PAGE 41
½
°F
E
F
FUEL
concentration from
X
INSPECTION/SETUP
DEF Refilling (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.
DCA150SSJU4F2
DEF TANKS
CAUTION
EXHAUST FLUID ONLY
D
Filling this tank with
anything other than
DIESEL EXHAUST FLUID
may result in severe
engine damage.
No Diesel
M94110000
Figure 43. DEF Tank Filling (DCA150SSJU4F2)
DCA150SSJU4F3
DEF TANK
ACCESS DOOR
SIDE VIEW
Figure 44. DEF Tank Filling (DCA150SSJU4F3)
CAPS
REAR VIEW
CAUTION
EXHAUST FLUID ONLY
D
Filling this tank with
anything other than
DIESEL EXHAUST FLUID
may result in severe
engine damage.
No Diesel
M94110000
CAP