Gorman-Rupp Pumps 810A2-F5L 1322933 and up - Manual (Page 31)

80 SERIES OM−02396
MAINTENANCE & REPAIR PAGE E − 12
or impossible without damage to the im-
peller or shaft.
A clearance of .020 to .040 inch (0,51 to 1,02 mm)
between the impeller and the seal plate is recom-
mended for maximum pump efficiency. Measure
this clearance and add or subtract impeller shims
until it is reached.
NOTE
The seal plate must be tight against the intermedi-
ate while setting the back impeller clearance.
Pump Reassembly
(Figure 2)
If the wear plate (39) was removed for replace-
ment, install the O-ring (38) in the groove in the
wear plate and lubricate it with grease to ease
installation. Press the wear plate into the pump
casing, and secure it to the pump casing with the
hardware (41 and 42).
Remove the two capscrews temporarily securing
the seal plate, and install the same thickness of
pump casing gaskets (12) as previously removed.
Secure the pump casing to the intermediate with
the nuts (14).
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the wear plate is also rec-
ommended for maximum pump efficiency. Reach
through the suction opening with a feeler gauge
and measure this clearance at three or four loca-
tions around the wear plate. Add or remove gas-
kets as required until the proper impeller clearance
is obtained.
See Figure 1, and reinstall any leveling shims used
under the pump casing mounting feet. Secure the
casing to the base (48) with the hardware (49, 50,
51 and 52).
Suction Check Valve Installation
(Figure 2)
Inspect the check valve components and replace
them as required. Subassemble the check valve
weights (50 and 53) and gasket (54) using the at-
taching hardware (51 and 52).
Secure the check valve assembly (49), valve seat
(44), suction flange gasket (45) and suction flange
(48) to the suction port with the nuts (47). Make
sure the large valve weight (53) is toward the inside
of the pump.
Check the operation of the check valve to ensure
proper seating and free movement.
Final Pump Reassembly
(Figure 1)
Be sure the pump and intermediate are secure to
the engine and the base.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
NOTE
If the discharge elbow (8, Figure 2) was removed,
position two of the capscrews (9) on the underside
of the elbow as shown in Figure 2.
Be sure the pump and engine have been properly
lubricated, see LUBRICATION.
Before starting the pump, remove the fill plug (6,
Figure 2) and fill the pump casing with clean liquid.
Reinstall the fill plug and tighten. (see OPERA-
TION, Section C).
LUBRICATION
Seal Assembly
(Figure 2)
Fill the grease cup (15) 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 5).