Gorman-Rupp Pumps 84A2-F3L 1348524 and up - Manual (Page 28)

80 SERIES OM−00900
MAINTENANCE & REPAIR PAGE E − 8
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 (26, 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 (16) 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 (26) in the shaft
keyway. Install a lathe dog on the drive end of the
shaft (27) 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.
Turn
Counterclockwise
Lathe Dog Arm
V" Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 4. Loosening Impeller
Pump Casing and Wear Plate Removal
(Figure 2)
To service the impeller (2), seal assembly (3), or
seal plate (36), the pump casing must be sepa-
rated from the base and intermediate. See Figure
1, and remove the hardware (48, 49, 50 and 51) se-
curing the pump casing (1) to the base (47). Tie
and tag any leveling shims used under the pump
casing mounting feet to ease reassembly.
Install a standard 5/8−11 UNC lifting eye in the
tapped hole in the top of the pump casing. Be sure
to screw the eye into the casing until fully engaged.
Remove the nuts (35), and use a hoist and sling of
suitable capacity to separate the pump casing and
gasket set (37) from the seal plate (36) and inter-
mediate (19).