Gorman-Rupp Pumps T10A65S-B /FM - Manual (Page 29)

OM-05522 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 7
shoulder‐type coupling (11) and separate the valve
body (4) and check valve from the suction head.
Separate the check valve from the valve body as de­
scribed above.
Replace the cleanout cover gasket (12) before re­
installing the cover.
Suction Head And Wear Plate Removal
(Figure E‐1)
To remove the suction head, support it with a suit­
able hoist and sling and remove the hardware (47,
48, 49 and 50) securing it to the pump casing. Re­
move the suction head gasket (45).
If the wear plate (38) does not slide easily from the
casing bore, position a wood or soft metal wedge
between the impeller vanes and the wear plate,
and tap the wedge with a hammer. Turn the impel­
ler every 45
_, repeating the process until the wear
plate is “walked” out of the pump casing.
Rotating Assembly Removal
(Figure E‐2)
The rotating assembly (2, Figure 1) may be re­
moved from either side of the casing; however, it is
recommended that it be removed through the suc­
tion head opening.
The impeller (1) should be loosened while the rotat­
ing assembly is still secured to the pump casing.
Before loosening the impeller, remove the seal cav­
ity drain plug (27A) and drain the seal lubricant.
This will prevent the oil in the seal cavity from es­
caping as the impeller is loosened. Clean and rein­
stall the seal cavity drain plug.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure E‐3. Loosening Impeller
Immobilize the impeller by wedging a block of
wood between the vanes, and remove the impeller
capscrew and washer (24 and 27). See Figure E‐3,
and install a lathe dog on the drive end of the shaft
(18) with the “V” notch positioned over the shaft
keyway. Use a long piece of bar stock to turn the
shaft in a counterclockwise direction (when facing
the drive end of the shaft). When the impeller
breaks loose, remove the wood block and lathe
dog. Do not fully unscrew the impeller from the
shaft at this time.
(Figure E‐1)
An optional disassembly tool for removing and in­
stalling the rotating assembly is available from the
factory. If improvised tools are used, be sure they
are heavy enough for safe use and will not damage
the pump.
Remove the inner hardware (30 and 31) from the
casing ring (27). If the removal tool is used, follow
the instructions packaged with it, and pull the rotat­
ing assembly from the pump casing (see Figure
E‐4 for removal tool use). If the removal tool is not
used, install three of the inner capscrews in the
jacking holes in the casing ring, and use them to
press the rotating assembly into the pump casing
until the bearing housing is free.
Remove the jacking screws from the casing ring.
Remove the outer hardware (28 and 29) and shim
sets (26). Separate the casing ring from the pump
casing. Tie and tag the shim sets for ease of reas­
sembly.