Flow HYPLEX - Page 35

© Flow International Corporation M-416 | 35
CHAPTER 3
Maintenance & Troubleshooting
My pump does not
produce the pressure
requested from
FlowMaster
(continued).
Insufficient water pressure or volume from
operator supply.
•
Check water source (flow rate and pres
-
sure; filtration system)
•
Check hoses and fittings for leaks/kinks
Failed inlet check valve (damaged surfaces,
erosion, debris, etc.).
•
Rebuild per service procedure
•
Replace check valve assembly
Failed outlet check valve (damaged surfaces,
erosion, debris, etc.).
•
Rebuild per service procedure
•
Replace check valve assembly
Failed check valve body (damaged seating
surface, cracked indentations from debris).
Replace check valve body.
Failed UHP seal. May be an indication of a failed plunger, im
-
proper tie rod loading, elevated inlet water
temperature, or lack of cooling water (clogged
cooling ports).
•
Inspect seal carrier and plungers (replace as
necessary)
•
Replace dynamic seal and rod seal
Leaking UHP cylinder.
•
Inspect for cracks
•
Inspect seal carrier and check valve body
contact surfaces for spalling, erosion, or
damage. Replace as necessary.
•
Replace the cylinder
Failed UHP tubing and connections.
• Check gland for proper torque
•
Check collar position
•
Check tubing or fitting for cracks. Replace
as necessary.
•
Check for deformed cone on tubing (may
indicate over-torque). Replace tubing as
necessary.
Failed on/off valve.
•
Install on/off valve service kit
•
Replace on/off valve body
Clogged inlet water filters. Replace filters (see section Changing the filter
elements).
Mis-installed subplate adapter rod seal. Re-install rod seal properly.
Loose wiring connection to the air propor
-
tional control valve.
Check and tighten connections.
Failed or loose connection on the UHP trans
-
mitter.
Failed or improperly calibrated UHP pressure
gauge.
Replace gauge or transmitter (the gauge trans
-
mitter cannot be re-calibrated).
Excessive length of tubing between pump and
pressure gauge.
Call Flow Technical Service.
Failed air proportional control valve. Replace air proportional control valve.