Gorman-Rupp Pumps 13A2-B 710664 and up - Manual (Page 32)

OM-00621 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
This seal is not designed for operation at
temperatures above 110
_F (43_C). Do not
use at higher operating temperatures.
Before installing the seal, inspect the bore of the
seal liner (10) for wear or grooves which might
cause leakage or damage to the seal packing
rings. If the seal liner requires replacement, re­
move the seal plate assembly as described in Seal
Removal And Disassembly, and position it on the
bed of an arbor (or hydraulic) press. Use a new
sleeve to force the old one out. After the new liner is
properly installed, a 1/4‐inch (6,4 mm) diameter
hole must be drilled through it to permit the flow of
lubricant to the seal assembly. Be careful to center
the drill in the threaded grease piping hole and not
damage the threads. Deburr the hole from the in­
side of the seal liner after drilling.
Slide the seal plate assembly over the impeller
shaft (22) and temporarily secure the seal plate to
the pedestal (15) 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 shoulder.
Subassemble the inboard stationary element,
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 element,
packing ring and stationary washer. Press this unit
into the lubricated seal liner. Install the outboard ro­
tating 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 (32) 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 automatic grease cup and piping (6, 7
and 8) in the seal plate. After the pump casing is
installed, lubricate the seal assembly as indicated
in LUBRICATION.
Pump Casing Installation
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick­
ness of pump casing gaskets (31) as previously re­
moved. Secure the pump casing (1) to the seal
plate and pedestal with the nuts (30). Do not fully
tighten the nuts at this time.
NOTE
The back cover assembly (40) must be in place to
adjust the impeller face clearance.
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the wear plate (33) is also
recommended for maximum pump efficiency. Set
this clearance by adding or removing gaskets in
the pump casing gasket set (31) until the impeller
scrapes against the wear plate when the shaft is
turned by hand. After the impeller scrapes, add ap­
proximately .010 inch (0,25 mm) of gaskets.
After the face clearance has been set, tighten the
nuts (30) securing the pump casing to the pedes­
tal.
Secure the pump casing to the base with the pre­
viously removed hardware. Be sure to reinstall any