ADJUSTMENT - TM-5-4320-302-14

CYLINDER HEAD ASSEMBLY, ROCKER ARMS, AND TAPPETS (CONT) - TM-5-4320-302-14_440

TM-5-4320-302-14 Forward Area Water Point Supply System (FAWPSS) Model WP55100 NSN 4320-01-168-1629 and Model 9095-91 NSN 4320-01-338-3305 Manual
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TM 5-4320-302-14 6-8. CYLINDER HEAD ASSEMBLY,R OCKER ARMS, AND TAPPETS (CONT) Location/Item Action Remarks 12. Crankshaft Rotate two complete revolutions of 360 degrees. 13. Cylinder head Remove waisted bolts and washers. Mark and re- move cylinder head(s) and intermediate rings. 14. Lead wire Remove and measure thickness with micrometer at thinnest point. Thickness should be 0.0394 to 0.0472 inch (1.0 to 1.2 mm). The measured thickness or piston top clearance should be com- pared to the specified limits. If measurement is outside limits, piston to clearance may be ad- justed using the following procedure. If measure- ment is within limits, proceed to assembly. THICKNESS (PISTON TOP CLEARANCE) SHOULD BE 0.0394 to 0.0472 INCH (1.0 to 1.2 mm). ADJUSTMENT 15. Cylinder a. Piston top clearance may be increased or de- shims creased by adding or removing shims. Shims are available in two thicknesses: 0.0079 inch (0.2 mm) or 0.0197 inch (0.5 mm). b. If piston top clearance is below 0.0394 inch (1.0 mm), remove cylinder and add appropri- ate number of shims. Use thicker shims rather than thinner shims whenever possible. 6-47

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