Gorman-Rupp Pumps 84A2-F3L 1348524 and up - Manual (Page 33)

OM−00900 80 SERIES
MAINTENANCE & REPAIR PAGE E − 13
IMPELLER SHAFT
SEAL
LINER
IMPELLER
IMPELLER
SHIMS
GREASE CUP
PIPING
SHAFT
SLEEVE
PACKING RINGS
WASHERS
STATIONARY
ROTATING
ELEMENTS
STATIONARY
SPRING
SEAL SEATS
SEAL
PLATE
WASHER
Figure 4. GS1250 Seal Assembly
This seal is not designed for operation at
temperatures above 110
_F (43_C). Do not
use at higher operating temperatures.
Inspect the seal plate, seal liner, and the impeller
shaft for burrs or sharp corners, and remove any
that exist. Replace the seal liner (4) if wear or
grooves exist which could cause leakage or dam-
age to the seal packing rings.
To replace the seal liner, position the seal plate on
the bed of an arbor (or hydraulic) press and use a
new seal liner to press the old liner out. After the
new liner is properly installed, a 1/4-inch diameter
(6,35 mm) hole must be drilled through it to permit
the flow of lubricant to the seal assembly. Be care-
ful to center the drill in the threaded hole so not to
damage the threads in the pump casing. Deburr
the hole from the inside of the seal liner after drill-
ing.
Slide the seal plate onto the shaft until fully seated
against the intermediate. Align the threaded seal
lubricant hole with the intermediate opening, and
temporarily secure the seal plate to the intermedi-
ate with two capscrews and nuts (1/2 UNC by 1 1/2
inch long, not supplied).
Position the inboard rotating element on the shaft
with the chamfered side facing the shaft shoulder
and slide it on until fully seated.
Subassemble the inboard stationary seat, packing
ring and spring washer. Press this subassembly
into the lubricated seal liner. A push tube cut from a
length of plastic pipe would aid in this installation.
The O.D. of the pipe should be approximately the
same diameter as the O.D. of the seal spring.
Install the spacer sleeve and spring.
Subassemble the outboard stationary seat, pack-
ing ring and spring washer. Press this subassem-
bly into the lubricated seal liner. Install the outboard
rotating element with the chamfered side facing
the impeller.