3.7 TROUBLE SHOOTING
3.8.2
Thoroughly clean the complete compressor
package assembly in accordance with the instructions in
3.7.1 Table 3 lists troubles that may occur in the
compressor package assembly, the probable causes,
and compressor crankcases. Drain the engine fuel tank,
and suggested remedies.
fuel filter and fuel lines. Tie prominent warning tags on
the compressor and engine stating the units require
3.8 PREPARATION FOR STORAGE OR SHIPMENT
lubrication before being placed in operation. Close and
latch all access doors. Inflate the tires to the specified
3.8.1 Start the engine in accordance with instructions in
pressure.
warm-up period. With the engine running at idle speed,
3.8.3 The compressor package assembly should be
remove the silencer cover and intake filter from the
stored inside a weatherproof shelter, protected from
compressor first stage cylinder head. Slowly inject
dust, moisture, and all abrasive or corrosive liquids and
approximately one ounce of aircraft instrument
gases. When stored outdoors, the compressor package
lubricating oil into the first stage air intake. Press the
assembly should be protected from the elements with a
stop button to stop the engine within two seconds after
weatherproof cover.
the last of the oil is injected. Replace the intake filter
and silencer cover on the compressor first stage
cylinder. Tape or plug the silencer cover intake port.
TABLE 3. TROUBLE SHOOTING
TROUBLE
PROBABLE CAUSE
REMEDY
Insufficient air flow,
Air leaks.
Check all connecting tubes and fit-
low outlet pressure,
tings. Tighten connections and/or
or excessive pump-up
replace defective parts.
time.
Pressure relief valve(s) damaged or
Check valves for escaping air. Re-
defective (open).
move, test, and repair or replace,
as necessary.
Leakage from pneumatic dump valve
due to:
a. Damaged or dirty parts.
a. Disassemble, clean, and re-
place parts, as necessary.
b. Defective push valve.
b. Check, replace, if necessary.
Rupture discs in second or third stage
Install new rupture disc(s).
cylinders, filter and separator, or
safety fitting leaking or blown out.
Shut-off valve to receiver partially
Open valve.
closed.
Line filter element clogged.
Replace element.
Restricted air inlet to compressor
Check. Remove restriction. Clean
first stage cylinder.
or replace intake filter.
Compressor not operating at rated
Engine governor not properly adjusted
speed.
See or engine operating erratically. Part II.
Damaged or worn air compressor.
Remove air compressor. Repair or replace.
Air compressor uses
Oil leaks.
Inspect for leakage. Repair or re-
excessive lubricating
.
place parts as necessary
oil.
Excessive piston -to-cylinder-wall
Remove, test, and repair or replace,
clearance in air compressor.
as necessary.
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