Northern Lights — Injector Removal
Repair & overhaul · injectors
From a Northern Lights operator's manual covering: NL378, NL378x, NL484, NL488x, NL498x. Check it applies to your exact model before use.
Applies to: Northern Lights NL378, Northern Lights NL378x, Northern Lights NL484, Northern Lights NL488x, Northern Lights NL498x
Before you start
- Do not use pry bars to remove injectors from cylinder head.
- Make sure you pull the sleeve out of the injector hole.
Procedure
- Clean loose dirt from around the injectors and fuel lines.
- Relieve high pressure in fuel lines by loosening delivery line flare nuts at each injector.
- Remove delivery lines by disconnecting from injectors and injection pump; remove all lines as an assembly.
- Cover ends of lines, injector inlets and injection pump outlets to keep dirt out.
- Remove return line retaining clamps and remove return lines.
- Remove nuts on each side of injector body; remove hold-down bracket with a 6 mm wrench or socket.
- Pull injector body from the hole.
- Discard the sleeves from the injector hole in the head.
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.
Full service-parts list: Northern Lights NL378 →, Northern Lights NL378x →, Northern Lights NL484 →, Northern Lights NL488x →, Northern Lights NL498x →
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.