ACCESSORIES
OM-06823
MAINTENANCE & REPAIR
PAGE E - 6
GRP33-08A AND GRP 33-08B
AIR RELEASE VALVE
DISASSEMBLY AND REASSEMBLY
Review all safety information in Section A.
The GRP33-08A and GRP33-08B Air Release
Valves requires little service due to their rugged,
minimum maintenance design. However, if it be
comes necessary to inspect or replace parts, fol
low these instructions, which are keyed to the sec
tional views (see Figures 1 and 2) and the accom
panying parts lists.
Before attempting to service the Air Release Valve,
disconnect or lock out the power supply to the
pump to prevent accidental start‐up. Close all
valves in the suction and discharge piping and
drain the pump casing and group grind. Refer to
the literature accompanying the pump for mainte
nance and repair of the pump and group grind.
Before operating or servicing the Air
Release Valve or pump, be certain prop
er safety practices are followed. Pro
vide adequate ventilation, prohibit
smoking, wear static‐resistant clothing
and shoes. Clean up all fuel spills imme
diately after occurrence.
Before attempting to open or service the
Air Release Valve or pump:
1. Familiarize yourself with this man
ual.
2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump and liquid to cool if
overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
Use
Only Genuine Gorman-Rupp
re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Air Release Valve Disassembly
Remove the drain plug (11) and drain the float
chamber. Clean and reinstall the drain plug after
draining, using “Loctite 567 PST” or equivalent on
the drain plug threads.
Disconnect the return tubing from the sump valve
(2).
To remove the sump valve, turn the valve clockwise
and pull until it comes out of the base of the float
chamber. Remove the gasket (1).
Disconnect the vent tubing from the air release
valve assembly (14). To remove the air release
valve assembly, disengage the hardware (5 and 6)
and pry the valve assembly off of the float chamber.
Remove the O‐ring (13).
Move the air release valve assembly to a clean
work station before further disassembly.
The only serviceable part of the air release valve as
sembly (14) is the rubber valve seat (not shown). If
the rubber seat requires replacement, remove the
socket head capscrews (17) and separate the cap
assembly (18) from the rest of the air release valve
assembly. Remove the gasket (16).
Use a pair of needle nose pliers to pull the rubber
valve seat out of its metal seat.
To remove the plunger pad (4), tap out the pin (9)
and remove the pad from the float rod (3).
To remove the rod and float (3 and 7), disengage
the hardware (5 and 6) and separate the air release
adaptor (15) from the float chamber (12). Remove
the O‐ring (13).
