TM 5-3820-245-14&P
CHAPTER V
TROUBLE SHOOTING
5-1
HYDRAULIC SYSTEM TROUBLE SHOOTING
CONDITION
PROBABLE CAUSE
REMEDY
Sluggish or no
A. Suction line
Check plug in tank, clean
response to
plugged.
strainer.
hydraulic
controls
B. Check oil level.
If low, refill with proper lubricant to oil level mark in
tank. See Lubrication Chart.
C. Check strainers
If flow of oil is obstructed
mounted in tank.
by foreign matter in screen, remove and clean with
solvent or kerosene, but NEVER SOAK IN GAS AND
BURN TO REMOVE FOREIGN MATTER.
D. Hydraulic leak
Replace with recommended
in line.
hydraulic line and length.
E. Faulty relief
Check relief valve for
valve.
foreign matter that might possibly be holding relief
valve in return to tank position. Clean and
reassemble, checking pressure to proper setting.
F. Malfunction of
If sluggish or no hydraulic
one operation
response is encountered on
only.
one cylinder only, disassemble cylinder and check the
rings and piston assembly and repair parts as shown
in the exploded views for the particular cylinder.
G. Hydraulic pump.
If all the above check points prove negative, the
probable cause is malfunction of hydraulic pump.
Replace with new pump. Determine the cause of
pump failure.
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