Table 3-3. Periodic Inspection Requirements - Continued
Inspect for leaks, loose mounting hardware, and defective gaskets.
Tighten loose mounting hardware.
Inspect valve mechanism if valves are noisy or loss of engine power is
evident. Remove valve covers and adjust valve lifter clearance, if
necessary. Correct valve lifter clearance is 0.0080 inch for intake
valves, and 0.0160 inch for exhaust valves. Replace defective cover
Remove spark plugs from engine and test cylinder compression by
turning over engine several times to stabilize compression gage read-
ing. If gage reading varies more than 10 pounds between four cylin-
ders, inspect cylinder head bolts for looseness. Tighten any loose
bolts and retest. If low compression or variation in compression per-
sists, trouble lies with cylinder head gasket, valves, or piston rings.
Inspect for loose spark plugs, poor connections, dirty or broken insula-
tors, and fouled spark `plugs. Replace damaged or worn plugs.
Clean dirty plugs and set gap to 0.0300 inch.
Inspect ignition magneto for loose mounting bolts and electrical connec-
tions. Correct any deficiencies noted.
Remove end cap and inspect distributor cap for cracks and corroded
terminals. Check breaker point gap. Correct gap is 0.015 inch at
full separation of points.
Inspect for loose mounting bolts and electrical connections. Examine
brushes, brush holders, and springs. Inspect commutator for dirt
and scoring. Tighten loose mounting bolts and electrical connec-
tions. Replace brushes worn to one-half their original length.
Check alternator using procedures of paragraph 4-3.
Check for incorrect operation, loose electrical connections, and loose
mounting hardware. Voltage regulator should allow appreciable
charge into battery after starter is used; afterwards, only a slight
charge in current should be read on AMMETER. Tighten loose mount-
ing hardware and electrical connections. Adjust or replace defective
Inspect control panel for loose or missing shock mounts.
Gages and meters
Check to see that all gages indicate correctly and that glass is not
cracked or broken. Tighten loose mounting hardware and hydraulic
connections. Replace damaged or defective gage.
Check to see that all meters are tightly mounted, are operating properly,
glass is not cracked or broken, and pointers are not bent or broken.
Tighten loose mounting hardware and electrical connections. Replace
damaged or defective meter.
Check to see that control valves operate properly, show no signs of
packing leaks, and manual controls are tightly mounted. Tighten or
replace packing as necessary. Replace defective or damaged control
Inspect tires for underinflation, abnormal or uneven wear, cuts, em-
bedded foreign material, and missing valve caps. Remove any
foreign matter from tires. Ensure that all tires are inflated to 60
PSI, and that all valve caps are in place.