Gorman-Rupp Pumps 82H65-B 1015831 and up - Manual (Page 28)

OM−03696 80 SERIES
MAINTENANCE & REPAIR PAGE E − 9
these clips can result in seal failure and
pump damage.
Slide the assembled rotating portion of the seal
and the sleeve onto the shaft until the sealing faces
contact.
Impeller Installation
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (5) as previously removed, and screw the
impeller onto the shaft until tight.
NOTE
As the impeller is screwed on, the seal spring will
be compressed until the shaft sleeve bottoms
against the shaft shoulder.
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the seal plate is neces-
sary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.
NOTE
Be sure the seal plate is tight against the pedestal
while measuring this clearance.
After the back clearance is set, secure the impeller
with the capscrew and washer (34 and 35).
Pump Casing Installation
If the wear plate assembly (33) was removed, posi-
tion the replacement wear plate assembly squarely
against the casing shoulder and secure it with the
mounting hardware (39, 40, 56 and 57). Replace
the fiber washer (39) if badly worn or compressed.
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick-
ness of pump casing gaskets (32) as previously re-
moved. Secure the pump casing (1) to the seal
plate and pedestal with the nuts (30).
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate is also rec-
ommended for maximum pump efficiency. Set this
clearance by adding or removing gaskets in the
pump casing gasket set (32) until the impeller
scrapes against the wear plate when the shaft is
turned. After the impeller scrapes add approxi-
mately .012 inch (0,30 mm) of gaskets.
Secure the pump casing to the base with the pre-
viously removed hardware. Be sure to reinstall any
leveling shims used under the mounting feet of the
pump casing.
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in-
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Suction Check Valve Installation
Inspect the check valve components (43) and re-
place as required. Subassemble the check valve
weights (44 and 48) and check valve gasket (47)
with the hardware (45 and 46).
Position the check valve assembly (43) in the suc-
tion port with the large weight (48) facing toward
the inside of the pump casing. Install the suction
flange (49) and secure with the nuts (42). Check
the operation of the check valve to ensure proper
seating and free movement.
Final Pump Assembly
Be sure the pump and power source are securely
mounted to the base. Reconnect the power source
to the pump.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.