Service
Inspection
Bimonthly
Biweekly
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39
See that all mounting and assembly nuts and screws are tight and that all linkage
and connections are in good condition and secure. If the carburetor is
defective replace (par. 110).
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40
Fuel filter. Inspect the filter sediment bowl for any accumulation of water or dirt,
leaks, or loose mounting. Check filter unit for damage or defects hindering
proper operation.
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Clean the sediment bowl if it contains dirt or water. If the fuel filter unit is
defective and cannot be repaired, replace (par. 109).
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41
Air cleaner. Inspect the air cleaner for loose mounting and connections. Remove
the air cleaner. Inspect for defective seal, clamp, filter element, and body.
Check the oil in the reservoir, and the amount of dirt present in the oil.
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41
Clean and service the air cleaner in accordance with LO 5-4930-202-12. Replace
the air cleaner, if it is defective (par. 108). Be sure that it is pressed firmly
into place and that the mounting is secure.
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43
Tank, cap, and gasket. Check the fuel tank frame mounting for loose nuts and
bolts, and for leaks. Check for defective filler cap and gasket.
43
43
See that the tank is securely mounted, free of leaks and that the filler cap is clean
and has tight fitting. Replace defective parts or report to the proper authority
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44
Fuel lines. Check the fuel lines for leaks, loose connections, and damage.
44
44
Replace damaged fuel line. Tighten loose connections (par. 113).
ELECTRICAL SYSTEM
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46
46
Spark plugs. Inspect the spark plugs for looseness, bad connections, and dirty or
broken insulators. If the engine loses power, check the condition of the spark
plug electrodes and the spark plug gap.
46
46
Replace spark plugs having pitted or burned electrodes. Tighten loose spark
plugs and connections (par. 117).
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47
Battery and battery box. Inspect batteries for cracks or leaks. Check the level
and specific gravity of the electrolyte in the batteries. Record the specific
gravity on DA Form 464. Check the batteries terminal connections for
corrosion and secure mounting.
47
47
Add distilled or clean water to cover 'A inch below the filler holes. Replace the
batteries if necessary (par. 116). See that batteries are securely mounted.
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49
Magneto. Inspect the magneto for loose mounting bolts and for oil leaks around
the mounting-flange gasket. Check condition and adjustment of the breaker
points.
Correct point gap is 0.020 inch.
49
Adjust breaker points if necessary (par. 115). Renew points if they are badly
burned or pitted.
50
50
50
Wiring and switch. Inspect wiring for oil soaked, cracked or frayed insulation;
broken wires, and loose or corroded connections. Check switch for condition
and proper operation.
50
50
See that all connections are clean and tight. Replace switch or wiring if defective.
57
57
57
Gage. Inspect air pressure gage for condition and proper operation.
57
57
Replace damaged or defective gage.
80
80
80
Frame (base). Check frame for bent members, breaks, and cracks, and for loose
or missing mounting and assembly bolts, and nuts.
80
80
Tighten or replace loose or missing bolts and nuts. See that any damaged parts
are repaired or replaced.
142
142
142
Relief valve. Check air receiver relief valve for proper operation.
142
142
Clean or replace valve, if necessary.
144
Compressor valves. Remove valves, clean thoroughly, and check for broken or
damaged parts and pitted seat. Correct any deficiencies (par. 136). Be sure
all parts are installed in their original position.
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146
Air intake muffler. Inspect air filter for loose connections and for excessive
accumulation of dust and dirt.
146
146
Remove and clean air filter if necessary (par. 131). Assemble and see that all
connections are tight.
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