Northern Lights — Winterizing / Out-of-Service (SP-21)
Maintenance · Generator set
From a Northern Lights operator's manual covering: M40C3, M944, OM944T3. Check it applies to your exact model before use.
Applies to: Northern Lights M40C3, Northern Lights M944
Before you start
- Close the sea-cock before opening drain cocks.
Procedure
- Change engine oil and filter as recommended.
- Run engine up to at least 140° F using fuel dosed with fuel system stabilizer or conditioner.
- Completely drain, flush and fill cooling system with pre-mixed 50/50 conventional ethylene-glycol heavy-duty diesel coolant.
- Loosen alternator drive belt.
- Seal intake and exhaust openings with heavy plastic bags and duct tape.
- Cover entire engine in a large plastic bag with moisture absorbing desiccant packs; tape closed at bottom.
- Store engine inside a building, preferably climate controlled.
Full service-parts list: Northern Lights M40C3 →, Northern Lights M944 →
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.