Change Diesel Exhaust Fluid (DEF) Dosing Unit Filter

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 filter)

D - DEF Dosing Unit Filter

CAUTION: Avoid contact with eyes. In case of contact, immediately flush 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 filter location.

IMPORTANT: Avoid system and filter damage. Ensure that DEF system is not frozen before changing filter. If system is frozen, operate engine until system has thawed completely.

1. Remove DEF dosing unit filter cover (A).

2. Remove and discard DEF dosing unit filter equalizing element (B).

3. NOTE: DEF dosing unit filter tool (C) is supplied with replacement filter.

   Insert “Black” end of DEF dosing unit filter tool (C) into DEF dosing unit filter (D) until CLICK is felt or heard indicating DEF dosing unit filter tool is fully engaged.

4. NOTE: A tool such as a screwdriver can be inserted into DEF dosing unit filter tool slot to assist removal.

   Pull DEF dosing unit filter tool and DEF dosing unit filter from DEF dosing unit. Discard DEF dosing unit filter and DEF dosing unit filter tool.

5. Clean DEF dosing unit threads and mating surfaces with distilled water.

6. Lubricate DEF filter O-rings with clean DEF. Carefully insert DEF dosing unit filter into DEF dosing unit.

7. Install new DEF dosing unit filter equalizing element into DEF dosing unit filter.

8. Install DEF dosing unit filter cover and tighten to specification.

   Item	Measurement	Specification
   DEF Dosing Unit Filter Cover	Torque	23 N·m (204 lb·in)