Gorman-Rupp Pumps 16A20-B 818301 and up - Manual (Page 32)

OM‐00710 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
IMPELLER
SHAFT
IMPELLER
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.