G-R
OM−05850
TROUBLESHOOTING
PAGE D − 1
TROUBLESHOOTING − SECTION D
Review all SAFETY information in Section A.
Before attempting to service the Air Re-
lease Valve:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power
source to the pump or isolate the Air
Release Valve to ensure that it will re-
main inoperative.
3. Allow the pump to completely cool if
overheated.
4. Check the temperature before open-
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
VALVE FAILS
TO CLOSE
Inlet line, outlet line or Air Release Valve
clogged.
Clean lines or valve.
Low discharge head application.
Adjust restrictor to obtain full valve
closure.
Pump not producing designed flow ca-
pacity or discharge head.
Operate pump at designed
speed. Refer to literature accom-
panying pump.
VALVE BODY
LEAKS
Loose hardware securing upper and
lower valve bodies.
Tighten hardware.
Valve hydraulically locked.
Introduce air behind suction check
valve.
Plunger movement restricted by de-
bris in lower valve body.
Remove valve and clean inlet side
of valve.
VALVE FAILS TO
OPEN
Bleed line clogged.
Clean bleed line (particularly at 90
_
bends).
Plunger U-ring or diaphragm dam-
aged.
Replace.
Valve hydraulically locked.
Introduce air behind suction check
valve.
