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Maintenance—Every 4500 Hours
DX,DEF,CHANGE,FILT -19-31OCT19-1/1
Change Diesel Exhaust Fluid (DEF) Dosing
Unit Filter
CAUTION: Avoid contact with eyes. In case
of contact, immediately ush eyes with large
amounts of water for a minimum of 15 minutes.
Reference the Materials Safety Data Sheet
(MSDS) for additional information.
IMPORTANT: If DEF is spilled or contacts any surface
other than the storage tank, immediately clean
the surface with clear water. DEF is corrosive to
painted and unpainted metallic surfaces and can
distort some plastic and rubber components.
Spilled DEF, if left to dry or if only wiped
away with a cloth, leaves a white residue.
Improperly cleaned DEF spill can interfere with
diagnosis of Selective Catalytic Reduction
(SCR) system leakage problems.
NOTE: See your John Deere equipment technical
manual or OEM manufacturer’s technical manual
for DEF dosing unit lter location.
IMPORTANT: Avoid system and lter damage. Ensure
that DEF system is not frozen before changing
lter. If system is frozen, operate engine until
system has thawed completely.
1. Remove DEF dosing unit lter cover (A).
2. Remove and discard DEF dosing unit lter equalizing
element (B).
NOTE: DEF dosing unit lter tool (C) is supplied
with replacement lter.
3. Insert “Black” end of DEF dosing unit lter tool (C) into
DEF dosing unit lter (D) until CLICK is felt or heard
indicating DEF dosing unit lter tool is fully engaged.
NOTE: A tool such as a screwdriver can be inserted into
DEF dosing unit lter tool slot to assist removal.
RG22534 —UN—21MAR13
DEF Dosing Unit Filter
A—DEF Dosing Unit Filter
Cover
B—DEF Dosing Unit Filter
Equalizing Element
C—DEF Dosing Unit Filter Tool
(supplied with new lter)
D—DEF Dosing Unit Filter
4. Pull DEF dosing unit lter tool and DEF dosing unit
lter from DEF dosing unit. Discard DEF dosing unit
lter and DEF dosing unit lter tool.
5. Clean DEF dosing unit threads and mating surfaces
with distilled water.
6. Lubricate DEF lter O-rings with clean DEF. Carefully
insert DEF dosing unit lter into DEF dosing unit.
7. Install new DEF dosing unit lter equalizing element
into DEF dosing unit lter.
8. Install DEF dosing unit lter cover and tighten to
specication.
Specication
DEF Dosing Unit Filter
Cover—Torque..............................................................................23 N·m
(204 lb·in)
3-14-2
112321
PN=256
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