Northern Lights M1064H / M1066H — Valve Clearances

Adjustments · Engine valve train

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. Disconnect negative battery terminal before valve adjustment.
2. Remove rocker arm cover with ventilator tube.
3. Remove plastic plugs or cover plate in engine timing holes on front side of flywheel.
4. Rotate flywheel clockwise with flywheel turning tool until timing pin engages timing hole.
5. Both rocker arms for No. 1 cylinder will be loose at TDC.
6. If not, rotate flywheel one complete turn and reinstall timing pin.
7. Adjust intake valve clearance to 0.36 mm (0.014 in) and exhaust to 0.46 mm (0.018 in).
8. Loosen jam nut, turn adjusting screw until slight drag on feeler gauge.
9. Hold adjusting screw and tighten jam nut to 27 N·m (20 lb-ft).
10. Check clearance again after tightening jam nut.
11. For 4-cylinder, adjust No. 1 and No. 3 exhaust and No. 1 and No. 2 intake; rotate 360° and adjust No. 2 and No. 4 exhaust and No. 3 and No. 4 intake.
12. For 6-cylinder, adjust No. 1, No. 3, No. 5 exhaust and No. 1, No. 2, No. 4 intake; rotate 360° and adjust No. 2, No. 4, No. 6 exhaust and No. 3, No. 5, No. 6 intake.

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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