Gorman-Rupp Pumps 16C20-F5L 1338868 and up - Manual (Page 29)

10 SERIES OM−02616
MAINTENANCE & REPAIR PAGE E − 8
valve pin (80). Slide the assembly out of the check
valve seat (71) and remove it from the pump.
NOTE
Further disassembly of the check valve is not re-
quired since it must be replaced as a complete unit.
Individual parts are not sold separately.
The check valve assembly may also be serviced by
removing the suction flange (76). To remove the
flange, disengage the hardware (74 and 75) and
separate the flange from the check valve seat. Re-
move the machine screws (72) and pull the seat
and assembled check valve from the suction port.
Remove the check valve pin and pull the check
valve assembly out of the seat.
Replace the flange gaskets (70 and 73) as re-
quired.
Separating Pump and Intermediate from
Engine
(Figure 3)
If the impeller or seal assembly require replace-
ment, the pump end and drive assembly must be
separated from the engine.
Support the pump using a suitable hoist and sling.
Remove the hardware (48, 49, 50 and 51, Figure 1)
securing the pump casing (1) to the base (47).
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment. Suction and dis-
charge hoses and piping must be re-
moved from the pump before lifting.
Disengage the hardware (6 and 7) securing the
drive assembly to the intermediate. Separate the
pump end and drive assembly from the engine by
pulling the pump end straight away from the en-
gine.
As the assemblies separate, the flexible portion of
the coupling assembly (3) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (22, Figure 2).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou-
pling must be replaced. To remove the ring, disen-
gage the hardware (4 and 5) securing it to the fly-
wheel.
Remove any leveling shims used under the casing
mounting feet. Tie and tag the shims for ease of
reassembly.
Move the pump end to a clean, well equipped shop
area for further disassembly.
Loosening Impeller
(Figure 2)
Before loosening the impeller (2), drain the seal lu-
bricant by removing the seal drain plug (53). This
will prevent the oil from escaping when the impeller
is removed. Clean and reinstall the drain plug.
Reach through the suction port and wedge a block
of wood between the vanes of the impeller and the
pump casing to prevent rotation.
If removed, install the shaft key (46) in the shaft
keyway. Install a lathe dog on the drive end of the
shaft (47) with the V" notch positioned over the
shaft key.
With the impeller rotation still blocked, see Figure 4
and use a long piece of heavy bar stock to pry
against the arm of the lathe dog in a counterclock-
wise direction (when facing the drive end of the
shaft). Use caution not to damage the shaft or key-
way. When the impeller breaks loose, remove the
lathe dog, key and wood block.
NOTE
Do not remove the impeller until the rotating assem-
bly has been removed from the pump casing.