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.
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