Gorman-Rupp Pumps 03C31-B 594106 and up - Manual (Page 27)

0 SERIES OM-01184
MAINTENANCE & REPAIR PAGE E - 8
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 (21) on a flat surface with the im­
peller side facing up. Subassemble the stationary
element into the stationary seat and use even pres­
sure to press this subassembly into the seal plate
until it seats squarely against the shoulder bore.
Carefully slide the assembled seal plate and sta­
tionary portion of the seal over the shaft. Use two
capscrews and nuts (not supplied) to temporarily
secure the seal plate to the pedestal.
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 centering washer (15).
Impeller Installation
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 3. Use
these measurements to calculate the required im­
peller location (dimension E). Add or remove im­
peller adjusting shims (16) until dimension E is ob­
tained.
D
B
2
A B
2
C D
E
Step 2 Step 1 Step 3
A+
B
2
C+
D
2
E = -
Figure 3. Centering Impeller Within Vane Plate Scroll
Install the correct thickness of impeller shims (16).
Position the impeller key (7) in the shaft keyway
(the key should protrude approximately 1/4 inch
(6,3 mm) from the end of the shaft).
Align the keyway in the impeller with the key and
press the impeller onto the shaft until fully seated.
Install the impeller washer over the impeller key.
Immobilize the impeller by inserting a bar between
the impeller vanes, being careful not to damage
the vanes. Install the impeller washer (25), a new
impeller capscrew (26) and the impeller lockwash­
er (27). Torque the impeller capscrew (26) to 20 ft.
lbs. (240 in. lbs. or 2,8 m. kg.). Remove the bar
from the impeller vanes.
Clean all of the old adhesive from the vane plate
(24) and its mating surface on the seal plate. Apply
a thin film of “3M Gasket Adhesive No. 847” or
equivalent compound to the vane plate and secure
the vane plate to the seal plate using the hardware
(32 and 33).
NOTE
After the vane plate has been installed, check for
free shaft rotation. Correct any scraping binding
before further reassembly.