Northern Lights M1064H / M1066H — Heat Exchanger Cleaning

Maintenance

For the Northern Lights M1064H / M1066H, from the Northern Lights operator's manual.

Applies to: Northern Lights M1064H, Northern Lights M1066H, John Deere Powertech Tier II 4045 engine, John Deere Powertech Tier II 6068 engine

Procedure

1. Drain cooling system.
2. Remove cooling water pipes between heat exchanger and water pump inlet.
3. Disconnect hose to seawater pump.
4. Unscrew attaching bolts holding heat exchanger to expansion tank.
5. Remove bolts holding heat exchanger cover.
6. Wash core inside and out; use chemical agents if necessary.
7. Clean accessible parts of heat exchanger housing.
8. Reassemble using new gaskets and sealing rings.

Full service-parts list: Northern Lights M1064H →, Northern Lights M1066H →

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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