beautypg.com

Gorman-Rupp Pumps 03A3-B 751140 and up User Manual

Page 27

background image

0 SERIES

OM-01176

MAINTENANCE & REPAIR

PAGE E - 8

IMPELLER

SHAFT

SEAL

PLATE

ROTATING

ELEMENT

RETAINER

SPRING

IMPELLER

ADJUSTING

SHIMS

IMPELLER

BELLOWS

SHAFT

SLEEVE

O‐RING

STATIONARY

SEAT

IMPELLER

KEY

Figure 2. Seal Assembly

This seal is not designed for operation at
temperatures above 160

_F (71_C). Do not

use at higher operating temperatures.

Lay the seal plate (10) on a flat surface with the im­
peller side facing up.

Subassemble the O‐ring onto the stationary ele­
ment and use even pressure to press this subas­
sembly into the seal plate until it seats squarely
against the shoulder bore.

Carefully slide the assembled seal plate and sta­
tionary seal element over the shaft. Use caution not
to nick or damage the stationary seat. Secure the
seal plate to the pedestal with the hardware (11
and 12).

Subassemble the rotating element into the retainer
and bellows. Lubricate the I.D. of the bellows with
water, and slide this subassembly over the shaft

sleeve until the seal face is just flush with the under­
cut end of the sleeve.

Slide the assembled shaft sleeve and rotating por­
tion of the seal and onto the shaft until the polished
faces contact. Continue to push the sleeve through
the seal until it is fully seated against the shaft
shoulder.

Install the seal spring.

Impeller Installation

Inspect the impeller and replace it if cracked or
badly worn.

For maximum pump efficiency, the impeller should
be centered within the volute scroll.

To verify the impeller positioning, measure the
pump casing and impeller as shown in Figure 3.
Use these measurements to calculate the required
impeller location (dimension E). Add or remove im­
peller adjusting shims (9) until dimension E is ob­
tained.