Komatsu PC01 – HYDRAULIC EXCAVATOR – Spark plug

1) Visually inspect the spark plug. Discard the plug if the insulator is cracked or chipped.

2) Remove carbon or other deposits with a stiff wire brush.

3) Measure the plug gap with a wire-type feeler gauge.

If necessary, adjust the gap by bending the side electrode.

4) Make sure the sealing washer is in good condition; replace the plug if necessary.

5) Install the plug fingertight to seat the washer, then tighten with a plug wrench (an additional 1/2 turn if a new plug) to compress the sealing washer,. If you are reusing a plug, tighten 1/8 – 1/4 turn after the
plug seats.


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