Gorman-Rupp Pumps UNIT 608 1347755 thru 1395613 - Manual (Page 35)

OM−01228 UNIT SERIES
MAINTENANCE & REPAIR PAGE E − 15
INTERMEDIATE
IMPELLER
SHAFT
IMPELLER
SPRING RETAINER
DRIVE BAND
BELLOWS
STATIONARY
SEAT
ROTATING
ELEMENT
STATIONARY
ELEMENT
IMPELLER
SHIMS
SPRING
RETAINER
Figure 7. 25271−821 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 intermediate bracket (6) on a flat sur-
face with the impeller side facing up. Subassemble
the stationary element and seat, and use even
pressure to press this subassembly into the inter-
mediate bracket until squarely seated in the inter-
mediate bore.
Carefully slide the assembled intermediate and
stationary seal components over the motor shaft
and secure the intermediate to the motor with the
hardware (12 and 13).
Subassemble the rotating element into the retainer
and bellows. Lubricate the I.D. of the bellows with
water, and slide this subassembly onto the shaft
until the polished faces contact. Install the seal
spring and spring retainer.
Impeller Installation
(Figure 2)
Inspect the impeller and replace it if cracked or
badly worn.
For maximum pump efficiency, the impeller should
be centered within the vane plate scroll.
To verify the impeller positioning, measure the
vane plate and impeller as shown in Figure 8. Use
these measurements to calculate the required im-
peller location (dimension E). Add or remove im-
peller adjusting shims (14) until dimension E is ob-
tained.