INSPECT PISTONS

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Measure ring gap with feeler gage

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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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The ring groove width be checked

TM 9-2815-226-34-1

3-20. INSPECT PISTONS

WARNING

COMPRESSED AIR USED FOR CLEANING PURPOSES WILL NOT EXCEED 30

PSI (207 KPA).

USE ONLY WITH EFFECTIVE CHIP GUARDING AND

PERSONAL PROTECTIVE EQUIPMENT (GOGGLES, SHIELD, GLOVES, ETC.).

P-D-680 SOLVENT IS POTENTIALLY DANGEROUS. AVOID PROLONGED OR

REPEATED CONTACT WITH SKIN. KEEP AWAY FROM FLAME OR EXCESSIVE

HEAT.

a. Clean pistons in solvent and blow dry with compressed air.

b. Check the piston for cracks, breaks, scoring, galling, and scratches.

c. Inspect all ring grooves for missing sections , breaks, cracks, distortion, and galling.

NOTE

ST-560 ring groove gage consists of four different size gages. Use gage marked

for NTC 400 engine, 5-1/2-in. piston.

d. Check the top and second ring grooves with ST-560 ring groove gage. Shoulders of gage must not touch ring

groove lands. If shoulders of gage touch, discard piston.

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