Gorman-Rupp Pumps 82D1-1B20-X 1460627 and up - Manual (Page 27)

OM−06362 80 SERIES
MAINTENANCE & REPAIR PAGE E − 9
til fully seated. The O.D. of the pipe should be ap-
proximately 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 until the face of the rotating element is
just flush with the chamfered end of the sleeve.
Slide the sleeve and rotating portion of the seal
onto the shaft until the seal faces contact. Continue
to push the sleeve through the seal until the cham-
fered 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 (12) 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
the proper clearance is obtained.
Pump Casing Installation
(Figure 2)
If the wear plate assembly (15) was removed for re-
placement, secure the new wear ring to the pump
casing using the attaching hardware (20, 21, 24
and 25) at this time. Replace the fiber washer (20) if
badly worn or compressed.
Install the same thickness of pump casing gaskets
(14) 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. After the impeller scrapes, add ap-
proximately .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
rollover base (17) with the hardware (11, 14, 15 and
16). Be sure to reinstall any leveling shims used un-
der 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 (23) in the suc-
tion port with the large weight toward the inside of
the pump. Install the suction flange (22) and se-
cure with the nuts (7). Check the operation of the
check valve to ensure proper seating and free
movement.
Final Pump Assembly
Be sure the pump and engine are securely
mounted to the pump mounting rails.
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 have 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.
LUBRICATION
Seal Assembly
The seal is lubricated by the medium being
pumped. No additional lubrication is required.