Change Diesel Exhaust Fluid (DEF) Dosing Unit In-Line Filter

CAUTION: Avoid possible personal injury. In case of DEF 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. Do not ingest DEF. In the event DEF is ingested, contact a physician immediately. Reference the Materials Safety Data Sheet (MSDS) for additional information.

IMPORTANT: Avoid corrosion of vehicle parts or surfaces. 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, will leave a white residue. Improperly cleaned DEF spill may 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 in-line DEF 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. 
   RG30728-UN-08AUG18

   DEF Fluid Removal

   A - Drain Plug with O-Ring

   Remove drain plug with O-ring (A) and discard.

   NOTE: Container must be DEF compatible and hold at least 300 mL (0.32 qt).

---




2. Drain DEF into a proper container.

3. 
   RG30727-UN-08AUG18

   Filter Removal

   A - Filter Housing

   Rotate filter housing (A) counterclockwise and pull down.

---




4. Remove and discard filter from housing (A).

   NOTE: If necessary, tap filter to loosen from filter housing (A).

5. 
   RG30726-UN-08AUG18

   Filter Housing Components

   A - O-Ring

   B - Foam Compensation Element

   C - Filter Housing

   Remove and discard O-ring (A) and foam compensation element (B).

   NOTE: Filter housing should be cleaned with clean DEF before installing new components to remove any sediment debris or contamination.

---




6. Install new O-ring (A) and foam compensation element (B) into filter housing (C).

7. 
   RG30725-UN-08AUG18

   Filter Housing and Components Installation

   A - Filter

   B - Filter Housing

   Install new filter (A) into filter housing (B).

---




8. 
   RG30727-UN-08AUG18

   In-Line DEF Filter Housing Installation

   A - Filter Housing

   Install filter housing (A) with O-ring, foam compensation element, and filter element.

---




9. Rotate filter housing (A) clockwise and tighten to specification.

   Item	Measurement	Specification
   In-Line DEF Filter Housing	Torque	25 N·m (221 lb·in)

10. 
    RG30728-UN-08AUG18

    In-Line DEF Filter Drain Plug

    A - Drain Plug with O-Ring

    Install new drain plug with O-ring (A). Tighten to specification.

    Item	Measurement	Specification
    In-Line DEF Filter Drain Plug	Torque	4 N·m (35 lb·in)

---