Grove Published 11-10-2014, Control # 524-00 7-17
RT880E SERVICE MANUAL POWER TRAIN
Diesel Exhaust Fluid (DEF) System
Diesel Exhaust Fluid (DEF) is an emissions control liquid
required by modern diesel engines. It is injected into the
exhaust stream. DEF is never added to diesel fuel. It is a
non-hazardous solution of 32.5% urea in 67.5% de-ionized
water. DEF is used by Selective Catalytic Reduction (SCR)
technology to remove harmful NO
x
emissions from diesel
engines.
DEF Tank
The DEF tank is located in front of the right rear outrigger
jack cylinder.
Removal
1. Drain the DEF into a suitable container (Figure 7-10).
Reinstall the drain plug and torque to 40-60 Ib-in (4.5-6.8
Nm).
2. Tag and disconnect the hoses from the tank.
3. Tag and disconnect the electrical connections.
4. Remove the hardware attaching the tank straps.
5. Remove the tank.
Installation
1. Position the tank on the mounting bracket.
2. Attach the tank straps and secure with the hardware.
3. Connect the electrical connectors as tagged during
removal.
4. Connect the hoses as tagged during removal.
5. Fill the tank with DEF.
DEF Supply Module
The DEF supply module is located behind the DEF tank.
Removal
NOTE: Do not disconnect the electrical connector until the
DEF dosing system has completed the purge
cycle. Before beginning to remove and/or discon-
nect any components, wait at least five minutes
after the keyswitch is turned OFF for the aftertreat-
ment DEF dosing system to purge the DEF from
the system. The purge cycle is an automatic pro-
cess and does not require intervention to occur.
The aftertreatment DEF dosing unit will create an
audible pumping noise during the purging process.
Do not power wash or steam clean this unit. Use
compressed air to remove any loose debris.
WARNING
Toxic Fluid Hazard!
Diesel exhaust fluid (DEF) contains urea. Do not get the
substance in your eyes. In case of contact, immediately
flush eyes with large amounts of water for a minimum of
15 minutes. Do not swallow. In the event the diesel
exhaust fluid is ingested, contact a physician immediately.
Item Description
1 DEF Tank
2 Tank Drain
3 Tank Straps
CAUTION
Spraying Fluid Hazard!
The DEF line connecting the aftertreatment DEF dosing
unit to the aftertreatment DEF dosing valve is under low
pressure and should not be disconnected while the
engine is running or before the system has completed the
purge process after engine shutdown. Disconnecting the
DEF line while under low pressure could cause DEF to
spray.
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