Gorman-Rupp Pumps 88B2-F5L 1323330 and up - Manual (Page 34)

80 SERIES OM−02301
MAINTENANCE & REPAIR PAGE E − 14
Using a suitable lifting device, position the interme-
diate (20, Figure 2) so the flexible portion of the
coupling seats inside the outer ring attached to the
engine flywheel.
NOTE
To ease installation, lightly lubricate the rubber por-
tion of the coupling with a non-petroleum based
lubricant such as vegetable oil or glycerin, or a sili-
con-based lubricant such as WD40" or equivalent.
Do not use petroleum-based lubricants, or any oth-
er substance which may soften or otherwise dam-
age the rubber.
Install the intermediate guards (29, Figure 2), and
secure the intermediate to the engine bellhousing
with the previously removed hardware (6 and 7).
Pump Casing and Wear Plate Installation
(Figure 2)
If the wear plate (35) was removed for replace-
ment, secure the replacement wear plate to the
pump casing with the hardware (37 and 38).
Remove the two capscrews temporarily securing
the seal plate, and install the same thickness of
pump casing gaskets (13) as previously removed.
Secure the pump casing to the seal plate and inter-
mediate with the nuts (34).
A clearance of .010 to .020 inch (0,3 to 0,5 mm) be-
tween 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 .010 inch (0,3 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.
(Figure 1)
Reinstall any leveling shims used under the pump
casing mounting feet and secure the casing (1) to
the base (48) with the previously removed hard-
ware (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 (52 and 53) and gasket (51) using the at-
taching hardware (49 and 50).
Install the check valve assembly in the valve seat
(43). Replace the seat gasket (42) and secure the
valve seat to the suction port using the round head
machine screws (46). Replace the suction flange
gasket (55) and secure the suction flange (54) to
the seat with the nuts (45).
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 (14) and the base (49).
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.
(Figure 2)
Before starting the pump, remove the fill plug as-
sembly (11) and fill the pump casing with clean liq-
uid. 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 6).