Northern Lights M773L — Heat Exchanger Cleaning

Maintenance

For the Northern Lights M773L, from the Northern Lights operator's manual.

Applies to: Northern Lights M773L

Procedure

1. Drain expansion tank and heat exchanger.
2. Remove heat exchanger end covers and remove the core.
3. Clean the inside of the core tubes using a metal rod; flush, inspect and clean again if necessary.
4. Reassemble, fill the cooling system, start the engine and check for leaks.

Full service-parts list: Northern Lights M773L →

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.

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