ASSEMBLY (cont) - TM-5-1940-277-34

PISTON AND CONNECTING ROD ASSEMBLY INSPECTION AND REPAIR INSTRUCTIONS (Continued) - TM-5-1940-277-34_459

TM-5-1940-277-34 Boat Bridge Erection Twin Jet Aluminum Hull Model USCSBMK1 (1940-01-105-5728) Manual
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TM 5-1940-277-34 PISTON AND CONNECTING ROD ASSEMBLY INSPECTION AND REPAIR INSTRUCTIONS (Continued) LOCATION ITEM ACTION REMARKS 8. Rings (9) and (10) New rings a. Check each Rings must be ring for checked in specified cylinder they gap by: will be used in. Pushing ring into bore to lower portion. Using piston head (11) to make sure ring is square with wall. Using feeler gage (15), measure gap. Checking against specifications below. SPECIFICATION: PISTON RING GAP Upper Compression 0.016 to 0.031 in. (0.406 to 0.787 mm) Intermediate 0.012 to 0.029 in. (0.305 to 0.737 mm) Lower 0.012 to 0.029 in. (0.305 to 0.737 mm) Oil Control 0.012 to 0.029 in. (0.305 to 0.737 mm) b. Check ring Use feeler to groove gage (15). clearance. SPECIFICATION: RING TO GROOVE CLEARANCE Upper Compression 0.0025 to 0.0040 in (00.063 to 0.102 mm) Intermediate 0.0027 to 0.0042 in (00.069 to 0.107 mm) Lower 0.0027 to 0.0042 in (00.069 to 0.107 mm) Oil Control 0.0025 to 0.0040 in (00.064 to 0.102 mm) 3-25

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