Gorman-Rupp Pumps 03A20-B 751140 and up - Manual (Page 27)

0 SERIES OM-01175
MAINTENANCE & REPAIR PAGE E - 8
IMPELLER
SHAFT
SEAL
PLATE
ROTATING
ELEMENT
RETAINER
SPRING
IMPELLER
ADJUSTING
SHIMS
IMPELLER
BELLOWS
O‐RINGS
STATIONARY
SEAT
IMPELLER
KEY
STATIONARY
ELEMENT
SPRING
RETAINER
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.
Position the seal plate (9) on a flat surface with the
impeller side down. Press the oil seal (15) into the
seal plate with the lip positioned as shown in Figure
1.
Turn the seal plate over so the impeller side is fac­
ing up. Subassemble the O‐ring onto the station­
ary seat and lubricate it with water or light oil. Use
even pressure to press the stationary portion of the
seal into the seal plate until it seats squarely
against the shoulder bore.
Carefully slide the assembled seal plate, lip seal
and stationary portion of the seal over the shaft.
Use caution not to roll or cut the lip of the oil seal or
nick or damage the stationary seat. Secure the seal
plate to the pedestal with the hardware (37 and 38).
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 un­
til the polished faces contact.
Install the seal spring and spring retainer.
Reinstall the bottle oiler and piping (12, 13 and 14)
after the impeller is installed.
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 (53) until dimension E is ob­
tained.