TM 9-1803A
1 l-12
ORDNANCE MAINTENANCE - ENGINE AND ENGINE ACCESSORIES FOR l/4-TON
4x4 TRUCK (WILWS.OVERLAND MODEL MB AND FORD MODEL GPW)
RA P6 28637
with a fine stone. A weak (less than 15 pounds compressed to *g/32
inch) or broken camshaft thrust plunger spring ,must be replaced.
12. VALVE AND VALVE SPRINGS.
a. Cleaning. Scrape the carbon off the valve heads and stems.
Clean the valves and valve springs thoroughly in dry-cleaning solvent
b. Inspection and Repair. Valves with bent or scored stems must
be replaced. Measure the outside diameter of each valve stem (fig.
26). If measurement is less than 0.3685 inch for the exhaust valve, or
inch for the intake valve, the valves must be replaced. Pitted,
36
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