Gorman-Rupp Pumps 16A20-B 818301 and up User Manual

Page 32

OM‐00710

10 SERIES

MAINTENANCE & REPAIR

PAGE E - 9

IMPELLER

SHAFT

IMPELLER

SHIMS

SHAFT

SLEEVE

ELEMENT

STATIONARY

ROTATING

ELEMENT

STATIONARY

SEAL

SPRING

SEAL SEAT

SEAL PLATE

O‐RING

OIL SEAL

BELLOWS

DRIVE BAND

SPRING CENTERING

WASHER

Figure 3. Seal Assembly

This seal is not designed for operation at
temperatures above 160

_F (71_C). Do not

use at higher operating temperatures.

Inspect the seal plate and replace it if cracked or
badly worn.

Place the seal plate on a flat surface with the impel
ler side down. Apply a light coat of oil to the oil seal
(53) and press it into the seal plate (58) with the lip
positioned as shown in Figure E-1.

Slide the seal plate over the shaft until fully seated
against the pedestal (37). Be careful not to dam
age the oil seal lip on the shaft threads. Align the
threaded seal lubricant hole with the pedestal
opening and temporarily secure the seal plate us
ing two capscrews and nuts (1/2 UNC X 1‐1/2 inch
long, not supplied).

Press the stationary subassembly (consisting of
the stationary seat, O‐rings and stationary ele
ment) into the seal plate until the stationary seat
bottoms against the seal plate bore. A push tube
cut from a length of plastic pipe would aid this in
stallation. The I.D. of the pipe should be approxi
mately the same diameter as the I.D. of the seal
spring.

Slide the rotating subassembly (consisting of the
rotating element, retainer and bellows) onto the lu
bricated shaft sleeve until the rotating element is
just flush with the chamfered end of the sleeve.
Slide the sleeve and rotating subassembly onto
the shaft until the seal elements contact. Continue
to push the sleeve through the seal until it bottoms
against the shaft shoulder. Be careful not to dam
age or roll the lip of the oil seal (53). Install the seal
spring and the spring centering washer.

Reinstall the bottle oiler and piping (30, 31, 32 and
33), and lubricate the seal assembly as indicated in
LUBRICATION, after the impeller has been in
stalled.