Gorman-Rupp Pumps 86A2-F3L 1022351 and up User Manual

Page 28

80 SERIES

OM−00955−04

MAINTENANCE & REPAIR

PAGE E − 12

IMPELLER SHAFT

SEAL

PLATE

SEAL

LINER

IMPELLER

SHIMS

GREASE

CUP

PIPING

SPACER
SLEEVE

PACKING
RINGS

WASHERS

STATIONARY

ROTATING
ELEMENTS

STATIONARY

SPRING

SEAL SEATS

SEAL
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 intermediate (21), seal liner (14) and
impeller shaft for burrs or sharp corners, and re-
move any that exist. Replace the seal liner 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 (36)
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
(6,4 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).

Slide the seal spacer washer (15) onto the shaft
with the chamfered side facing the shaft shoulder.

Position the inboard rotating element on the shaft
with the chamfered side facing the spacer washer,
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 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.