Engine Overheats

Section IV. TROUBLESHOOTING - TM-5-4310-227-150060

Section V. RADIO INTERFERENCE SUPPRESSION - TM-5-4310-227-150062

TM-5-4310-227-15 Compressor Reciprocating: Air; Gasoline Engine 15 CFM 175 PSI; Receiver Mounted (Champion Pneumatic Model OEG-458-ENG-1) Manual
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TM 5-4310-227-15

3-18. Engine Stops Suddenly

3-15. Engine Overheats

Possible remedy

Probable cause

Possible remedy

Probable cause

Crankcase oil level low ____ Fill to proper level (para

Fuel tank empty __________ Fill the fuel tank with the

proper grade of fuel

3-6).

(para 2-6).

Airflow restricted _______Provide adequate ventila-

Fuel strainer clogged _____Service fuel strainer(para

tion. Clean the cooling

3-36).

fins.

Carburetor defective ______Replace carburetor

Fuel mixture too lean _____Adjust the carburetor

Fuel tank cap air vent hole

(para 3-37).

(para 3-7).

plugged ______________Remove the restriction.

Exhaust system restricted _Clean or replace muffler

Air cleaner clogged ______Service air cleaner (para

and fitting (para 3-56).

3-6).

Fuel of poor grade ________ Drain fuel tank (para 3-

6) and replenish fuel

supply (para 2-6).

3-19. Compressor Pumps Too Slowly

Probable cause

Possible remedy

3-16. Engine Backfires

Air cleaner clogged _______ Service the air cleaner

Possible remedy

Probable cause

(para 3-6).

V-belts improperly adjusted Adjust the V-belts (para

Fuel contains dirt or water _Drain fuel tank (para 3-6)

and replenish fuel supply

3-59).

Oil level low ____________Measure oil level in crank-

(para 2-6). Service

strainer (pars 3-6).

case and f ill according

to lubrication order.

Fuel mixture too lean ______Adjust the carburetor

(para 3-37).

Timing incorrect _________Rest timing (para 3-46).

3-20. Compressor Overheats

Intake valve sticking ______ Remove spark plug and

Probable cause

Possible remedy

pour a small amount of

Ventilation inadequate ____Provide adequate ventila-

penetrating oil into the

tion around the unit.

engine block to loosen

Cylinder fins dirty _________Clean the cylinder fins.

the valve.

Intercooler and aftercooler

Spark plug too hot _______Install spark plug with

tubes dirty _____________ Clean the intercooler and

correct heat range (para

after cooler tubes with

3-44) .

brush and compressed

air.

3-17. Engine Lacks Power

Oil level low _____________Add oil to the crankcase

Possible remedy

Probable cause

(para 3-6).

V-belts slipping __________ Adjust the V-belts (para

Fuel strainer-to-carburetor

3-59).

tube restricted _________Remove restriction or

Air cleaner dirty _________Service the air cleaner

replace tube (para 3-34).

(para 3-6).

Fuel strainer clogged _____Service fuel strainer (para

3-36).

Intake or exhaust valves

Fuel mixture too lean __ ___Adjust carburetor (para

faulty ________________Clean or replace the valves

3-37).

(para 3-32).

Ignition poor ___________Service or replace spark

plug (para 3-44). Ad-

3-21. Compressor Fails To Build Up Pressure

just the magneto con-

Possible remedy

Probable cause

tact set (para 3-46).

Air cleaner restricted _____Service air cleaner (para

Air cleaner clogged ______ Service the air cleaner

(para 3-6).

36).

Intake and exhaust valves

Exhaust restricted ________Remove and clean the

muffler and nipple

defective ______________Clean or replace the valve

(para 3-56).

(para 3-82).

Timing improper ________Reset timing (para 3-46).

V-belts improperly adjusted Adjust the V-belts (para

3-59).

Governor controls out-of-

adjustment ___________ Adjust the governor link-

Leaks in air lines and

age (para 3-39).

fittings _______________Tighten the connections.

3-21

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