Gorman-Rupp Pumps V4A60-D914L3 1459605 and up - Manual (Page 41)

OM−06289 ULTRA V SERIES
MAINTENANCE & REPAIR PAGE E − 14
NOTE
An alternate method of removing the back cover
from the pump casing is to remove the back cover
nuts (15) and two diagonally opposing locking col-
lars (16). Install two 1/2−16 UNC x 2 inch long
screws in the tapped holes in the back cover and
use them to press the back cover out of the pump
casing.
Inspect the wear plate, and replace it if badly
scored or worn. To remove the wear plate, disen-
gage the hardware (7 and 8).
Inspect the back cover O-rings (6 and 9) and re-
place it if damaged or worn.
Separating Intermediate And Drive Assembly
From Engine
(Figure 6)
Further disassembly requires separating the pump
end and drive assembly from the engine. 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. Support the
pump using a suitable hoist and the lifting eye.
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in-
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Remove the hardware securing the pump casing
to the base.
Disengage the hardware (2 and 3, Figure 2) secur-
ing the drive flange to the engine bellhousing, and
remove the guards (20, Figure 5). 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 (2) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (1).
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 (25, Figure 5).
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 (3 and 4) 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 5)
Before attempting to loosen the impeller, remove
the seal cavity drain plug (16A) and drain the lubri-
cant. This will prevent the oil from escaping as the
impeller is removed. Clean and reinstall the drain
plug.
With the pump end separated from the engine and
the back cover (10, Figure 4) removed, wedge a
block of wood between the vanes of the impeller
and the pump casing to prevent rotation.
If removed, install the shaft key (25) in the shaft
keyway. Install a lathe dog on the drive end of the
shaft (26) with the V" notch positioned over the
shaft key.
With the impeller rotation still blocked, see Figure 7
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.