Kohler — DEF Filter Replacement
Maintenance · Exhaust aftertreatment system
From a Kohler service manual covering: KD1250-4, KD1750, KD2000, KD2500, KD3250, KD4000, KD700-KD4000, TP-7143. Check it applies to your exact model before use.
Applies to: Kohler KD1250-4, Kohler KD1750, Kohler KD2000, Kohler KD2500, Kohler KD3250, Kohler KD4000
Before you start
- Handling diesel exhaust fluid. Can cause skin, eye, respiratory irritation.
Procedure
- Disable generator set and remove from service; wear anti-static gloves and goggles.
- Disconnect wiring harness from sleeve.
- Remove three screws and loosen and remove sleeve.
- Remove filter; use strap wrench or filter wrench if needed.
- Clean surrounding surfaces of DEF filter and manifold.
- Replace O-ring on filter manifold; lubricate with P80 or DEF.
- Lubricate seal of new filter with DEF or distilled water; fill new filter about 2/3 full with DEF; thread onto manifold.
- Tighten filter to 30 Nm (22 ft. lbs.) then additional 120°; reinstall sleeve; reconnect harness; reset run time in Kodia; run 30 minutes.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten filter to 30 Nm (22 ft. lbs.) and then additional 120°
- Replace both filters at same time on dual DEF filter models KD2500-4, KD3250-4
Full service-parts list: Kohler KD1250-4 →, Kohler KD1750 →, Kohler KD2000 →, Kohler KD2500 →, Kohler KD3250 →, Kohler KD4000 →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.