Gorman-Rupp Pumps 83A2-GX270 1423221 and up - Manual (Page 27)

OM−06218 80 SERIES
MAINTENANCE & REPAIR PAGE E − 9
This seal is not designed for operation at
temperatures above 110
_F (43_C). Do not
use at higher operating temperatures.
Position the inboard rotating element on the shaft
with the chamfered side toward the impeller, and
slide it on until fully seated.
Subassemble the inboard stationary seat, packing
ring and stationary washer. Press this unit into the
lubricated seal liner until the seal faces contact. A
push tube cut from a length of plastic pipe would
aid this installation. The I.D. of the tube should be
approximately the same size as the I.D. of the seal
spring.
Install the spacer sleeve and seal spring.
Subassemble the outboard stationary seat, pack-
ing ring and stationary washer. Press this unit into
the lubricated seal liner. Install the outboard rotat-
ing element with the chamfered side toward the
impeller.
After the impeller and grease cup have been in-
stalled, lubricate the seal as indicated in LUBRI-
CATION, Section E.
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (36) as previously removed, and screw the
impeller onto the shaft until tight.
A clearance of .010 to .020 inch (0,25 to 0,51 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.
Install the automatic grease cup and piping (11, 12
and 13) in the intermediate. After the impeller is
installed, lubricate the seal assembly as indicated
in LUBRICATION.
Pump Casing Installation
(Figure 2)
If the wear plate (19) was removed for replace-
ment, secure it to the pump casing using the at-
taching hardware (20, 21, 33 and 34) at this time.
Replace the fiber washer (20) if badly worn or com-
pressed.
Install the same thickness of pump casing gaskets
(18) as previously removed, and secure the pump
casing to the intermediate with the nuts (10). Do
not fully tighten the nuts at this time.
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate is also rec-
ommended for maximum pump efficiency. Set this
clearance by adding or removing gaskets in the
pump casing gasket set until the impeller scrapes
against the wear plate when the shaft is turned. Af-
ter the impeller scrapes add .010 inch (0,25 mm) of
gaskets.
After the face clearance has been set, tighten the
nuts securing the pump casing to the intermediate.
See Figure 1, and secure the pump casing to the
base with the previously removed hardware. Be
sure to reinstall any leveling shims used under the
casing mounting feet.
Suction Check Valve Installation
(Figure 2)
Inspect the check valve components and replace
as required. Subassemble the check valve weights
(26 and 30) and gasket (29) using the attaching
hardware (27 and 28).
Position the check valve assembly in the suction
port with the large weight (30) toward the inside of
the pump casing. Install the suction flange (23),
and secure with the nuts (32). Check the operation
of the check valve to ensure proper seating and
free movement.
Final Pump Assembly
(Figure 1)
Be sure the pump and engine are securely
mounted to the base.