Gorman-Rupp Pumps 83A1-L100EE-X 1512373 and up - Manual (Page 27)

OM-05133 80 SERIES
MAINTENANCE & REPAIR PAGE E - 9
pipe to press the seat into the intermediate bore un­
til fully seated. The O.D. of the pipe should be
approximately the same as the O.D. of the seal
spring.
Subassemble the rotating element into the retainer
and bellows, then slide this subassembly onto the
shaft sleeve (32) until the face of the rotating ele­
ment is just flush with the chamfered end of the
sleeve.
Slide the sleeve and seal parts onto the shaft until
the seal faces contact. Continue to push the sleeve
through the seal until the chamfered end seats
firmly against the shaft shoulder.
Install the seal spring.
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (33) 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.
Pump Casing Installation
(Figure 2)
If the wear plate assembly (16) was removed for re­
placement, secure it to the pump casing using the
attaching hardware (17, 18, 20 and 21) at this time.
Replace the fiber washer (21) if badly worn or com­
pressed.
Install the same thickness of pump casing gaskets
(15) as previously removed and secure the pump
casing to the intermediate with the nuts (14). 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. This
clearance can be obtained by adding or removing
gaskets in the pump casing gasket set until the im­
peller scrapes against the wear plate when the
shaft is turned. After the impeller scrapes add .008
inch (0,20 mm) of gaskets.
After the face clearance has been set, tighten the
nuts (14) securing the pump casing to the interme­
diate.
See Figure 1 and secure the pump casing (1) to the
rollover base (13) with the hardware (23, 24, 25,
and 26). Be sure to reinstall any leveling shims
used under the mounting feet of the pump casing.
Suction Check Valve Installation
(Figure 2)
Inspect the check valve components and replace
as required. Subassemble the check valve weights
(25 and 29) and check valve gasket (28) with the
hardware (26 and 27).
Position the check valve assembly (24) in the suc­
tion port with the large weight (29) toward the in­
side of the pump casing. Install the suction flange
(22) and secure with the nuts (31). Check the oper­
ation 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 rollover base.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Be sure the engine has been properly lubricated,
see the literature supplied with the engine.
(Figure 2)
Remove the fill plug assembly (9) and fill the pump
casing with clean liquid. Reinstall the fill plug and
tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.