Northern Lights NL488K2 / NL488W2 — Injector Service
Maintenance · Fuel injectors
For the Northern Lights NL488K2 / NL488W2, from the Northern Lights operator's manual.
Applies to: Northern Lights NL488K2, Northern Lights NL488W2
Before you start
- Escaping diesel fuel under pressure can penetrate skin causing serious personal injury. Do not use pry bars to remove injectors.
Procedure
- Check injectors every 500 hours by Northern Lights dealer or injection repair station.
- Clean loose dirt around injectors and fuel lines.
- Relieve high pressure by loosening delivery line flare nuts.
- Remove delivery lines as assembly; cover ends and injector inlets.
- Remove return line clamps and return lines.
- Remove nuts on each side of injector body; remove hold-down bracket; pull injector.
- Discard sleeves from injector hole; cover holes.
- Install new sleeve, injector, hold-down bracket. Tighten nuts to 5 - 6.5 ft-lbs.
- Install fuel lines, return lines, delivery lines. Bleed and check for leaks.
Tools required
- 6 mm wrench or socket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten injector hold-down nuts to 5 - 6.5 ft-lbs (0.7 - 0.9 kgf-m).
Full service-parts list: Northern Lights NL488K2 →, Northern Lights NL488W2 →
Source: Northern Lights operator's 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.