Gorman-Rupp Pumps 82D1-EX13-X 1390156 and up - Manual (Page 29)

80 SERIES OM−06106
MAINTENANCE & REPAIR PAGE E − 11
NOTE
If the intermediate was not separated from the en-
gine during disassembly, subassemble the O-ring
into the stationary seat and use a piece of plastic
tubing to press the seat into the intermediate bore
until fully seated. The O.D. of the tubing should be
approximately the same as the O.D. of the seal
spring.
Lubricate the shaft sleeve with light oil, then slide
the rotating portion of the seal (consisting of the ro-
tating element, bellows and retainer) onto the lubri-
cated shaft sleeve until the face of the rotating ele-
ment is just flush with the chamfered end of the
sleeve.
Slide the subassembled sleeve and rotating por-
tion of the seal 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 and spring centering washer
(11).
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (8) 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 rec-
ommended for maximum pump efficiency. Mea-
sure this clearance and add or remove impeller
shims until the proper clearance is obtained.
Pump Casing Installation
(Figure 2)
If the wear plate assembly (14) was removed for re-
placement, secure the new wear plate to the pump
casing using the attaching hardware (16, 19, 20
and 21). Replace the fiber washer (16) if badly worn
or compressed.
Install the same thickness of pump casing gaskets
(13) as previously removed, and secure the pump
casing to the intermediate with the nuts (7). 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 by hand. After the impeller scrapes,
add approximately .008 inch (0,20 mm) of gaskets.
After the face clearance has been set, tighten the
nuts (7) securing the pump casing to the intermedi-
ate.
See Figure 1 and secure the pump casing to the
roll cage (4) with the hardware (15, 16 and 17). 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
and check valve with the previously removed hard-
ware.
Position the check valve assembly (18) in the suc-
tion port with the large weight toward the inside of
the pump. Install the suction flange (17) and se-
cure with the nuts (7). 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 roll cage.
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).
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.