Gorman-Rupp Pumps PAV3C60C-B-E10 575/3 All serial numbers - Manual (Page 49)

PA SERIES OM-06502
MAINTENANCE & REPAIR PAGE E - 22
Do not attempt to separate the rotating
portion of the seal from the shaft sleeve
when reusing an old seal. The rubber bel­
lows will adhere to the sleeve during use,
and attempting to separate them could
damage the bellows.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak­
age. Inspect the integral shaft sleeve for nicks or
cuts on either end. If any components are worn, or
the sleeve is damaged, replace the complete seal;
never mix old and new seal parts.
Install the stationary seal element in the stationary
seat. Press this stationary subassembly into the
seal plate bore until it seats squarely against the
bore shoulder. A push tube made from a piece of
plastic pipe would aid this installation. The I.D. of
the pipe should be slightly larger than the O.D. of
the shaft sleeve.
Slide the rotating portion of the seal (consisting of
the integral shaft sleeve, spring centering washer,
spring, bellows and retainer, and rotating element)
onto the shaft until the seal faces contact.
Install the impeller as previously described, then
proceed with Pump Casing Installation.
Pump Casing Installation
(Figures 3 and 4)
Lubricate the O‐ring (12) with light grease and in­
stall it over the shoulder on the seal plate (4, Figure
5). Use a suitable lifting device to position the
pump casing against the seal plate. Be careful not
to damage the O‐ring.
Secure the pump casing to the rotating assembly
with the hardware (10 and 11).
If the suction spool (4) was removed, replace the
gasket (3) and position the spool against the pump
casing. Secure the spool to the pump casing with
the hardware (32 and 33).
Flap Valve Installation
(Figure 3)
Inspect the flap valve assembly (27) and replace it
if badly worn.
NOTE
The flap valve assembly must be replaced as a
complete unit. Individual parts are not sold sepa­
rately.
If the gasket (3) was removed, clean the mating
surfaces of the casing (2) and flange (25). Install
the new gasket and the flange against the pump
casing.
Position the flap valve adaptor in the mounting slot
in the flange and secure the assembly with the
check valve pin (26).
Reinstall a new flange gasket (28). Apply “Loctite
No. 242 Threadlocker” or equivalent compound on
the threads of the the studs (28) in the discharge
elbow. Lower the discharge elbow over the flange
and pump casing and slide the studs down
through the holes. Secure the parts with the hard­
ware (32 and 33).
Priming Valve Reassembly And Installation
(Figures 3 and 7)
Clean and inspect the components of the priming
valve. Inspect the linkage and ensure the orifice
button squarely engages the valve seat. Replace
the orifice button if required (see Priming Valve
Removal and Disassembly for orifice button re­
moval).
Gorman‐Rupp provides replacement parts for the
cover gasket and the orifice button. If any of the
other priming valve components are worn or dam­
aged, they must be replaced before reinstalling the
priming valve. For additional parts and service in­
structions for the valve, Contact the Val‐Matic
Valve and Manufacturing Corporation, or go to
www.valmatic.com on the World Wide Web. Ref­
erence Val‐Matic Model Number 25.5.
After servicing the priming valve components, rein­
stall the priming valve cover gasket and secure the
cover to the valve body with the previously re­
moved hardware.