Gorman-Rupp Pumps 82D2-B 344003 and up - Manual (Page 27)

OM−00802 80 SERIES
MAINTENANCE & REPAIR PAGE E − 9
Slide the seal plate assembly over the impeller
shaft (13) and temporarily secure the seal plate to
the pedestal (16) using two capscrews and nuts
(3/8−16 UNC x 1−1/2 inch long, not supplied).
Slide the inboard rotating element into the lubri-
cated seal liner with the chamfered side toward the
shaft sholder.
Subassemble the inboard stationary seat, packing
ring and stationary washer. Press this unit into the
lubricated seal liner until the seal faces contact. A
push tube cut from a length of plastic pipe would
aid this installation. The I.D. of the tube should be
approximately the same size as the I.D. of the seal
spring.
Slide the spacer sleeve onto the shaft until it seats
against the inboard rotating element and install the
seal spring.
Subassemble the outboard stationary seat, pack-
ing ring and stationary washer. Press this unit into
the lubricated seal liner. Install the outboard rotat-
ing element with the chamfered side toward the
impeller.
Lubricate the seal assembly as indicated in LU-
BRICATION after the impeller has been installed.
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (4) as previously removed, and screw the
impeller onto the shaft until tight.
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.
Install the automatic grease cup and piping (6, 7
and 8) in the seal plate. After the impeller is
installed, lubricate the seal assembly as indicated
in LUBRICATION.
Pump Casing Installation
If the wear plate assembly (23) was removed, posi-
tion the replacement wear plate assembly squarely
against the casing shoulder and secure it with the
mounting hardware (24, 25, 29 and 30). Replace
the fiber washer (30) 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 (22) as previously re-
moved. Secure the pump casing (1) to the seal
plate and pedestal with the nuts (20). Do not fully
tighten the nuts at this time.
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 (22) 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.
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 components of the check valve assembly
(34) and replace as required. If separated at disas-
sembly, assemble the check valve weights (35 and
36) to the check valve gasket (37) with the hard-
ware (38 and 39).
Position the check valve assembly in the suction
port with the large weight (35) facing toward the in-