Gorman-Rupp Pumps T4A60S-4024T 1320259 and up - Manual (Page 37)

OM-05782 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 11
Remove the back cover nuts (34) and pry the back
cover and assembled wear plate from the pump
casing (1).
NOTE
An alternate method of removing the back cover
from the pump casing is to remove the back cover
nuts (34) and two diagonally opposing locking col­
lars (32). Install two 1/2-13 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 (17 and 18).
Inspect the back cover O‐rings (16 and 20) and re­
place it if damaged or worn.
Suction Check Valve Removal
(Figure 3)
If the check valve assembly (41) is to be serviced,
remove the check valve pin (42), reach through the
back cover opening and pull the complete assem­
bly from the suction flange (37).
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.
Separating Intermediate And Drive Assembly
From Engine
(Figure 5)
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 (6 and 7) securing the
drive flange to the engine bellhousing, and remove
the guards (24, Figure 4). Separate the pump end
and drive assembly from the engine by pulling the
pump end straight away from the engine.
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 (16, Figure 4).
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 4)
Before attempting to loosen the impeller, remove
the seal cavity drain plug (15A) 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 (18, Figure 3) 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 (23) in the shaft
keyway. Install a lathe dog on the drive end of the