Northern Lights 984K / M984 — Injection pump removal and installation
Repair & overhaul · fuel injection pump
For the Northern Lights 984K / M984, from the Northern Lights operator's manual.
Applies to: Northern Lights M984, Northern Lights 984K engine
Before you start
- Never steam clean or pour cold water on an injection pump while the engine is running or the pump is warm.
- Any disassembly of the injection pump must be done by specially trained mechanics; warranties are void if pump seals are broken by unauthorized persons.
Procedure
- Clean the injection pump, hoses and surrounding area with solvent or steam cleaner (not while running or warm).
- Remove the injection lines as an assembly without removing spacers; cover all openings.
- Remove the pump support bracket on the rear of the pump.
- Remove the plug from the timing case cover and mark the pump gear through the hole; do not rotate the crankshaft after marking.
- Remove the 4 mounting nuts (two at the back, two at the front).
- Take the pump to a Northern Lights dealer or injection repair station.
- On installation, reverse the removal process and make sure the gear mark shows through the plug hole.
- Torque the mounting bolts to 21.7 - 32.5 ft/lbs (3.0 - 4.5 kg-m).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Injection pump mounting bolts 21.7 - 32.5 ft/lbs (3.0 - 4.5 kg-m)
Full service-parts list: Northern Lights M984 →
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.