TM 5-3820-245-14&P
5-1
HYDRAULIC SYSTEM TROUBLE SHOOTING (Continued)
CONDITION
PROBABLE CAUSE
REMEDY
Pressure drop
Relief valve
The system is equipped with
from original
spring relaxed
single bank of valves.
pressure
or normal loss
Loosen jam nut on inlet
setting on the
of flow due to
section and turn adjustment
machine.
pump wear.
screw clockwise until the original pressure setting is
reached. If unable to raise pressure by adjusting relief
valve, the pump is badly worn and should be
replaced. Check exploded views for proper machine
model and pump number. PROPER RESSURE IS
1450 PSI.
Noisy pump
A. Oil supply low.
Fill reservoir check with
caused by
dipstick.
B. Oil too heavy.
Change to proper oil. See Lubrication Chart.
C. Oil filter
Install new filter.
plugged.
D. Suction line
Clean strainer.
strainer plugged.
Oil heating.
A. Oil supply low.
Fill reservoir. See Lubrication Chart.
B. Contaminated oil.
Drain reservoir and refill with clean oil.
C. Setting of relief
Set to correct pressure.
valves too high
or too low.
D. Oil in system too
Drain reservoir and refill
light.
with proper viscosity oil.
Shaft seal
A. Worn shaft seal.
Replace shaft seal.
leakage.
B. Broken molded V
If replacing the shaft does
seal or gasket.
not stop leakage, the pump
Bearing out of
should be disassembled and
position. Excessive
checked for worn parts.
internal wear.
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