Service
Inspection
Bimonthly
Biweekly
147
147
147
Compressor. Inspect compressor head, cylinder cooling fins, intercooler and
flywheel fan for any accumulation of dust or dirt. Check all connections for air
leaks. See that crankcase breather cap is clean.
147
147
See that all parts of compressor are clean. Correct any air leaks. On new or
reconditioned compressor, check head bolts for tightness at the first weekly
service.
Section IV. TROUBLESHOOTING
77. General
This section provides information useful in diagnosing and correcting unsatisfactory operation or failure of the
lubricating and servicing unit and its components. Each trouble symptom stated is followed by a list of probable causes
of the trouble. The possible remedy recommended is described opposite the probable cause.
78. Backfire at Carburetor
Probable cause
Possible remedy
Air leakage intake manifold ................................ ............ Replace faulty intake manifold gaskets (par. 123,.
Fuel mixture too lean ................................ ..................... Adjust the carburetor (par. 110).
Spark impulse advanced too far -................................ ... Time ignition (par. 119).
79. Engine Lacks Power
Probable cause
Possible remedy
Carburetor or fuel pump not operating properly ............. Replace fuel pump (par. 111).
If fuel pump is operating correctly, remove and inspect
carburetor. Replace a defective carburetor (par. 110).
Restricted air cleaner ................................ ..................... Remove and clean the air cleaner (par. 108).
Restricted exhaust muffler or tail pipe ............................ Remove obstructions. If muffler or tail pipe is badly
clogged, install a new muffler (par 123).
80. Starter-Generator Will Not Crank Engine
Probable cause
Possible remedy
Discharged or defective batteries . ............................... Recharge or replace (par. 116).
Loose connections ................................ ......................... Tighten connections. Replace battery cables if necessary (par.
Defective switch................................ ............................. Replace switch.
81. Starting Batteries Fail To Stay Charged
Probable cause
Possible remedy
Defective batteries ................................. ....................... Recharge or replace batteries (par. 116).
Loose battery connections ................................ .............. Tighten connections (par. 115).
Defective regulator ................................ ........................ Replace regulator (par. 118).
82. Power Drops Under Heavy Load
Probable cause
Possible remedy
Poor compression ................................ ......................... Tighten cylinder heads and spark plugs (par. 122).
Faulty carburetor ................................ ........................... Adjust, replace carburetor (par. 110).
Restricted exhaust line ................................ .................. Remove obstructions. If muffler or tail pipe is badly clogged,
install a new muffler assembly (par. 123).
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