Gorman-Rupp Pumps 16A2-F3L 1317807 and up - Manual (Page 31)

10 SERIES OM−00698
MAINTENANCE & REPAIR PAGE E − 8
the hardware (67 and 68) and separate the suction
flange from the check valve seat (77). Remove the
capscrews (69), and pull the seat and assembled
check valve from the suction port. Pull the check
valve out of the seat.
Inspect the check valve components for wear or
damage. If replacement is required, disengage the
hardware (72 and 73) and separate the valve
weights (74 and 76) and gasket (75).
Replace the flange gaskets (65 and 78) 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.
Disconnect the discharge piping. Support the
pump using a suitable hoist and sling. Remove the
hardware (48, 49, 50 and 51, Figure 1) securing the
pump casing to the base.
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, turn the cross arm
on the automatic lubricating grease cup (15) clock-
wise until it rests against the cover (see Figure 6 in
LUBRICATION). This will prevent the grease in the
cup from escaping when the impeller is removed.
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 (22) in the shaft
keyway. Install a lathe dog on the drive end of the
shaft (23) 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.