TM 5-4310-335-14
Table 5-1. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Inspect for low interstage pressure.
a. Check for restriction of 1st stage inlet. Remove restriction.
b. Inspect for leaky 1st, 2nd, or 3rd stage relief valves. Replace faulty parts.
Step 5. Check for leaking or popping of 2nd stage relief valve assembly.
Inspect for clogged intercoolers and clean or replace faulty components.
Step 6. Inspect for low oil pressure.
a. Check for faulty packing in oil pump and improper pressure setting of spring in oil pump relief
assembly. Install new packing. Rotate retainer to obtain proper pressure setting.
b. Inspect for loose connections in oil supply tubes and external leakage. Tighten all connections
and if this does not correct the malfunction, replace connections.
c. Check for low oil level in oil sump. Fill oil sump as described in the lubrication order.
d. Inspect for oil leakage. Illuminate all leakage.
WARNING
Dry cleaning solvent, P-D-680 or P-S-661, used to clean parts is potentially
dangerous to personnel and property. Avoid repeated and prolonged skin
contact. Do not use near open flame or excessive heat. Flash point of
solvent is 100 (39 ) - 138 (59 ).
F
C
F
C
e.
Inspect for a clogged oil strainer. Clean the strainer by Immersing ill suitable solvent. Air blow to
clean and dry thoroughly using compressed air.
5.
LOW OIL PRESSURE (COMPRESSOR)
Step 1. Inspect for faulty packing in oil pump and improper pressure setting of spring in oil pump relief
valve assembly.
Install new packing. Rotate retainer to obtain proper pressure setting.
Step 2. Inspect for loose connections in oil supply tubes and external leakage.
Tighten all connections and if this does not correct the malfunction, replace connections.
Step 3. Check for low oil level in oil sump.
Fill oil sump as described in the lubrication order.
Step 4. Inspect for oil leakage.
a. Inspect for a damaged oil seal. Replace a leaking oil seal.
b. Inspect for leaky packing. Replace packing.
c. Cheek the entire piece of equipment for leakage. Replace all broken or malfunctioning parts.
WARNING
Dry cleaning solvent, P-D-680 or P-S-661, used to clean parts is potentially
dangerous to personnel and property. Avoid repeated and prolonged skin
contact. Do not use near open flame or excessive heat. Flash point of
solvent is 100 (39 ) - 138 (59 ).
F
C
F
C
Step 5. Check for a clogged oil strainer.
Clean the strainer by immersing In suitable solvent. Air blow to clean the strainer and dry
thoroughly using compressed dr.
6.
HIGH OIL PRESSURE (COMPRESSOR)
Step 1. Inspect for improper pressure setting of spring in oil pump relief valves assembly.
Rotate retainer to obtain proper pressure setting.
WARNING
Dry cleaning solvent, P-D-680 or P-S-661, used to clean parts is potentially
dangerous to personnel and property. Avoid repeated and prolonged skin
contact. Do not use near open flame or excessive heat. Flash point of
solvent is 100 (39 ) 138 (59 ).
F
C
F
C
Step 2. Check for a clogged oil strainer.
Clean the strainer by immersing in suitable solvent. Air blow to clean the strainer and dry
thoroughly sun compressed air.
5-7
