MQ Power DCA300SSJU4F3 Operation Manual page 41

3. NEVER overfill fuel tank — It is important to read the
fuel gauge when filling trailer fuel tank. DO NOT wait
for fuel to rise in filler neck (Figure 42).
FUEL GAUGE LOCATED
ON GAUGE UNIT ASSEMBLY
Figure 42. Full Fuel Tank
CAUTION
DO NOT OVERFILL fuel system. Leave room for fuel
expansion. Fuel expands when heated (Figure 43).
Figure 43. 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 puirty urea carbamide) and 67.5 deionized water. DEF
is used as a consumable in selective catalytic reduction
(SCR) in order to lower NO
emissions.
1. Make sure the engine is OFF.
2. For DCA300SSJU4F2 generators open the enclosure
rear door and remove the filler cap from both DEF
tanks and fill with DEF fluid (Figure 44).
3. For DCA300SSJU4F3 generators open the DEF
access door (Figure 45) remove filler cap and fill with
DEF fluid.
4. Upon initial start-up, completely fill the DEF tank with
DEF fluid. DO NOT overfill.
DCA300SSJU4F2/F3 60 HZ GENERATOR• OPERATION MANUAL — REV. #2 (04/18/22) — PAGE 41
½
°F
E
F
FUEL
concentration from diesel exhaust
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.
DCA300SSJU4F2
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 44. DEF Tank Filling (DCA300SSJU4F2)
DCA300SSJU4F3
DEF TANK
ACCESS DOOR
SIDE VIEW
Figure 45. DEF Tank Filling (DCA300SSJU4F3)
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