Other possible problems/symptoms
for the intensifier
Intensifier does not shift
•
High-pressure waterjet on/off valve closed
•
Waterjet orifice clogged with debris
•
Shift sensor cable is disconnected
•
Intensifier disabled at PLC
•
Hydraulic pressure setting too low (applies only to in
-
tensifier pumps with multiple hydraulic pumps and
multiple intensifiers, such as 20XW or 30XQ)
•
Faulty shift sensor spring or shift pin
•
Faulty shift valve
•
Faulty pilot valve
•
Faulty integrated shift module
Intensifier shifting loudly (knocking)
•
Using a large orifice (this may be a normal mode of
operation)
Intensifier does not produce desired pressure
•
Waterjet orifice is too large
•
Damaged waterjet orifice
•
Failed (leaking) high-pressure tubing or on/off valve
•
Failed inlet or outlet check valve poppets
•
Hydraulic pressure setting is too low
•
Failed hydraulic pump
•
Failed main system relief valve
Intensifier strokes noticeably faster in one direc
-
tion than the other
•
Failed inlet or outlet check valves
•
Faulty shift sensor spring or shift pin
•
Failed low-pressure seal
•
Faulty shift valve
•
Faulty pilot valve
Persistently low seal life
•
Poor inlet water quality
•
Worn UHP plungers
•
Pump running at higher than rated pressure
•
Inlet water temperature too high
•
Hot hydraulic oil
•
Improper loading of the tie rods
(see Maintenance Procedure A)
Damaged inlet face of check valve body
•
Debris in water
•
Inlet check valve support (010564-1) has rotated
Filler tube stuck in UHP cylinder
•
This can occur occasionally. Remove the filler tube
by pulling it from the end of the cylinder.
76 | M-376 © Flow International Corporation
94K HYPERPRESSURE INTENSIFIER
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