Discard piston if diameter exceeds 5.483 in. (139.268 mm).

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The ring groove width be checked

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TM-9-2815-226-34-1 Engine Diesel 6 Cylinder Inline Turbocharged Cummins NTC-400 BC2 Manual

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REPAIR PISTONS

TM 9-2815-226-34-1

g. Discard piston if diameter exceeds 5.483 in. (139.268 mm).

NOTE

Specification applies to pin bore check at 70F (21C). Add 0.005 in. (0.013 mm)

for every 10F (-12 C) over 70F (21C) up to 90 F (32C).

h. Measure piston pin bore inside diameter.

CAUTION

REBORING OF PISTON PIN BORE AND USE OF OVERSIZE PIN IS NOT

PRACTICAL. MISALINEMENT WHICH COULD RESULT FROM SUCH PRACTICE

WILL CAUSE SEIZURE OF PISTON OR FAILURE OF CONNECTING ROD BEARING.

i. Discard piston if diameter exceeds 1.999 in. (50.775 mm).

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