SECTION 5
TROUBLESHOOTING
p. 5-3
05148382
5.2 TROUBLESHOOTING – HP WATER
5.2.1 HP Water Signal Abnormal Fluctuation
Orifice Large/ Worn/
Damaged
Check that orifices in use do not exceed capacity of
pump.
Check that orifices are in good working order. Verify
that a jewel is not missing from the orifice mount.
Check Piping Leaks Check system components for leaks including dump
valve condition.
Check Valve Leakage Inspect pump discharge HP check valves.
Inspect pump inlet low-pressure (LP) check valves.
Check Seal Leakage Inspect plunger seals and sealing heads.
Hydraulic Control
Malfunction
Check hydraulic valve operation.
Verify proper shifting of 4-way directional control valve.
Verify proper proximity switch operation.
5.2.2 Hot Surfaces On HP Cylinder Components
HP Discharge Check
Leaking
Inspect check valve seat, poppet, spring, and spring
guide condition and sealing head.
LP Inlet Check Valve
Leaking
Inspect check valve poppet, spring, o-ring, poppet
retaining screw, and sealing head.
Sealing Head or Plunger Check plunger and sealing head for erosion scratches
or mechanical damage and replace if necessary.
Damaged HP Cylinder Check cylinder bore for damage. Polish if required.
5.2.3 Oil or Water Leaks from HP Cylinder Weep Holes
Oil Leak HP Intensifier Check hydraulic cylinder O-ring and back-up ring for
leakage.
Check proximity switch and spacer O-ring area for oil
leakage.
Replace hydraulic seal (cartridge) and clean holes in
hydraulic seal retaining flange.
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