TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
VALVE FAILS TO
RELEASE AIR
PRODUCT ESCAP
ING FROM VENT
LINE
Priming tube improperly connected to
pump or valve.
Check installation diagram (see
Section B). Correct piping.
Integral priming pump malfunction
ing.
Refer to Operator's Manual accom
panying the centrifugal pump for
repair instruction.
Check valve at pump discharge port
not installed or seating improperly.
Install check valve or inspect for free
movement and proper seating.
Small in‐line check valve (used in stan
dard Roto‐Prime
r
configuration) not
removed prior to installation of Air Re
lease Valve priming line.
Remove in‐line check valve.
Valve floats sticking or out of adjust
ment.
Check the valve floats for free
movement. Adjust valve head at
top of cylinder (see Section E, Fig
ure 1 for dimensions).
Priming lines pinched or broken.
Straighten or replace line(s).
Priming tube improperly connected to
pump or valve.
Check installation diagram (see
Section B). Correct piping.
Check valve at pump discharge port
not installed or seating improperly.
Install check valve or inspect for free
movement and proper seating.
Valve floats sticking or out of adjust
ment.
Check the valve floats for free
movement. Adjust valve head at
top of cylinder (GRP33-06A and
GRP33-06B Valves only, see Sec
tion E, Figure 1 for dimensions).
Valve seat contaminated or worn.
Clean needle valve and seat. Re
place worn parts.
PRODUCT LEAKS
FROM VALVE OR
PIPING
Priming lines pinched or broken.
Straighten or replace line(s).
Gaskets damaged, pipe fittings loose.
Replace damaged parts, tighten
fittings.
OM-06823
ACCESSORIES
TROUBLESHOOTING
PAGE D - 1
TROUBLESHOOTING - SECTION D
Review all safety information in Section A.
