Gorman-Rupp Pumps 84A2-4024H 1488564 and up - Manual (Page 34)

OM−06412 80 SERIES
MAINTENANCE & REPAIR PAGE E − 15
Remove the two capscrews temporarily securing
the seal plate and install the same thickness of
pump casing gaskets (37) as previously removed.
Use the lifting device to position the pump casing
over the impeller, and secure the pump casing and
seal plate to the intermediate with the nuts (35). Do
not fully tighten the nuts until the impeller face
clearance has been set.
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 removing gaskets
from the casing gasket set until the impeller
scrapes against the wear plate when the shaft is
turned. After the impeller scrapes, add approxi-
mately .008 inch (0,20 mm) of gaskets.
NOTE
An alternate method of adjusting this clearance is to
reach through the discharge port and measure the
clearance with a feeler gauge. Add or subtract
pump casing gaskets until the proper impeller
clearance is attained.
Reinstall any leveling shims used under the pump
casing mounting feet, and secure the casing to the
base with the previously removedhardware (not
shown).
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in-
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Suction Check Valve Installation
(Figure 3)
Inspect the check valve components and replace
them as required. Subassemble the check valve
weights (51 and 53) and gasket (52) using the at-
taching hardware (49 and 50).
Install the check valve assembly in the valve seat
(54). Replace the seat gasket (55), and secure the
valve seat to the suction port using the round head
machine screws (47). Replace the suction flange
gasket (42), and secure the suction flange (43) to
the seat with the nuts (45).
Check the operation of the check valve to ensure
proper seating and free movement.
Final Pump Reassembly
Be sure the pump and intermediate are secured to
the base and engine.
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 pump and engine have been properly
lubricated, see LUBRICATION.
Before starting the pump, remove the fill plug as-
sembly (12, Figure 2) and fill the pump casing with
clean liquid. Reinstall and tighten the fill plug (see
OPERATION, Section C).
LUBRICATION
Seal Assembly
(Figure 3)
Fill the grease cup (16) through the grease fitting
with No. 2 lithium base grease until grease es-
capes from the relief hole. Turn the grease cup arm
counterclockwise until it is at the top of the stem;
this will release the spring to apply grease to the
seal (see Figure 7).