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42 - 1
Section E
Hydraulics
9803/6020
Section E
42 - 1
Issue 1
Remote Control Valve
Fault Finding
Symptoms
Possible Causes
Counter measures
1
. Low secondary pressure
a
. Primary pressure is low.
Apply the correct primary pressure.
b
. Spring (241) is damaged.
Replace the spring.
c
. Clearance between the spools and
Replace the remote control valve
casing is too large.
assembly.
d
. The handle unit is loose.
Disassemble, reassemble or replace the
handle unit.
2
. Unstable secondary pressure
a
. Sliding parts are sticking
Repair the sticking part.
b
. Fluctuations in the tank line pressure.
Check return line and filter for blockage.
c
. Air is trapped in the piping.
Operate the valve several times to
remove the air.
3
. High secondary pressure
a
. The tank line pressure is too high.
Check return line and filter for blockage.
b
. Sliding parts are sticking.
Repair the sticking part.
Summary of Contents for JS70
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