G379, G398 & G399 ENGINES Caterpillar


Spark Plug And Adapters (Shielded Ignition)

Usage:

(1) Transformer.

(2) Spark plug adapter. Put liquid soap in the seal groove and on the seal before installing the adapter in the cylinder head. Put 5P3931 Anti-Seize Compound on adapter threads.

Tighten the adapter to a torque of ... 200 ± 13 N·m (150 ± 10 lb ft)

(3) Spark plug.

Gap of the spark plug ... 0.33 to 0.41 mm (.013 to .016 in.)

Install transformer (1) on spark plug (3).

Tighten the transformer on the spark plug to a torque of ... 47 ± 3 N·m (35 ± 2 lb ft).

Install the transformer and spark plug assembly in the spark plug adapter and tighten to a torque of ... 38 ± 3 N·m (28 ± 2 lb ft).

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