Gorman-Rupp Pumps 14A65-B 776101 and up - Manual (Page 33)

10 SERIES OM-02151
MAINTENANCE & REPAIR PAGE E - 10
screws in the seal retainer and locking them in
place with a punch to prevent loosening.
New seal assemblies are equipped with
spring holding clips for storage pur­
poses. Remove and discard these clips
before proceeding with seal reassemb­
ly. When removing the clips, use caution
so that they do not pop off abruptly and
cause personal injury. Failure to remove
these clips can result in seal failure and
pump damage.
Slide the sleeve and rotating portion of the seal
onto the shaft until the seal elements contact.
Proceed with Impeller Installation and Adjust­
ment.
Impeller Installation and Adjustment
Inspect the impeller and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (13) as previously removed and screw the
impeller onto the shaft until tight.
A clearance of .020 to .040 inch (0,51 to 1,02 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.
Install the impeller washer (55). Secure the impel­
ler using the impeller capscrew (56).
Pump Casing Installation
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick­
ness of pump casing gaskets (53) as previously re­
moved, and secure the pump casing to the seal
plate and pedestal with the nuts (51). Do not fully
tighten the nuts at this time.
NOTE
The back cover assembly must be in place to adjust
the impeller face clearance.
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate (54) is also
recommended for maximum pump efficiency. Set
this clearance by adding or removing gaskets in
the pump casing gasket set (53) until the impeller
scrapes against the wear plate when the shaft is
turned by hand. After the impeller scrapes, add ap­
proximately .008 inch (0,20 mm) of gaskets.
After the face clearance has been set, tighten the
nuts (51) securing the pump casing to the pedes­
tal.
If a lifting eye was used to install the pump casing,
be sure to remove the eye before putting the pump
back in service.
Back Cover Installation
If the wear plate (54) was removed for replace­
ment, secure it to the cover plate (64) using the at­
taching hardware (57 and 58) at this time. The wear
plate must be concentric to prevent binding when
the back cover is installed.
Clean any scales or debris from the contacting sur­
faces on the pump casing that might prevent a
good seal with the back cover. Replace the back
cover gasket (60) and slide the back cover assem­
bly into the pump casing. Be sure the wear plate
does not bind against the impeller.
NOTE
To ease future disassembly, apply a film of grease
or `Never‐Seez' on the back cover shoulder, or any
surface that contacts the pump casing. This action
will reduce rust and scale build‐up.