Gorman-Rupp Pumps 82D1-GX160 1257391 and up - Manual (Page 25)

80 SERIES OM−05297
MAINTENANCE & REPAIR PAGE E − 8
ENGINE
CRANKSHAFT
IMPELLER
IMPELLER
SHIMS
SHAFT
SLEEVE
SPRING RETAINER
ROTATING
ELEMENT
SPRING
INTERMEDIATE
STATIONARY
ELEMENT
RETAINER
BELLOWS
STATIONARY
SEAT
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.
Install the stationary element in the stationary seat.
Lubricate the O.D. of the stationary seat and press
this stationary subassembly into the intermediate
until fully seated. After installation, wipe the sealing
face lightly in a concentric pattern with a clean, lint-
free tissue.
Position the intermediate (8) and stationary subas-
sembly over the shaft and against the engine. Use
caution not to damage the stationary sealing ele-
ment. Secure the intermediate to the engine with
the hardware (9 and 10).
Slide the rotating subassembly (consisting of the
rotating element, bellows and retainer) over the lu-
bricated shaft sleeve until the rotating element is
just flush with the chamfered end of the sleeve.
Slide the sleeve over the shaft until the sealing
faces contact. Continue to press the shaft sleeve
through the seal assembly until it seats squarely
against the shaft shoulder.
Install the seal spring and spring retainer (5).
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (4) as previously removed, and screw the
impeller onto the shaft until tight.
A clearance of .010 to .020 inch (0,25 to 0,50 mm)
between the impeller and the intermediate is nec-
essary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.