Gorman-Rupp Pumps 14C20-4024T 1303140 and up - Manual (Page 31)

OM−05781 10 SERIES
MAINTENANCE & REPAIR PAGE E − 9
Turn
Counterclockwise
Lathe Dog Arm
V" Notch
Shaft Key
Impeller
Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure E−4. Loosening Impeller
Removing Intermediate
(Figure E−2)
Position the pump on the work surface with the
drive end of the impeller shaft facing up. Install
three hooks, equally spaced, in the mounting
holes in the intermediate. Use a sling and suitable
lifting device to support the intermediate.
Remove the nuts (39) securing the pump casing to
the intermediate (19). Use the hoist and sling to
separate the intermediate and rotating portion of
the pump from the pump casing.
Remove the pump casing gaskets (40). Tie and tag
the gaskets, or measure and record their thickness
for ease of reassembly.
Impeller Removal
(Figure E−2)
With the impeller loosened, unscrew it from the
shaft. Use caution when removing the impeller;
tension on the shaft seal spring will be released as
the impeller is unscrewed. Inspect the impeller and
replace if cracked or badly worn.
Slide the impeller adjusting shims (76) off the im-
peller shaft. Tie and tag the shims, or measure and
record their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figure E−2)
To remove the seal assembly (3), remove the
spring holder and spring. Slide the shaft sleeve
(75) and rotating portion of the seal assembly off
the shaft as a single unit. Apply oil to the sleeve and
work it up under the rubber bellows. Slide the rotat-
ing portion of the seal off the sleeve.
Remove the hardware (36 and 37) and carefully
slide the seal plate (56) and stationary portion of
the seal off the shaft as a unit. Use a suitably sized
dowel to press the stationary portion of the seal out
of the seal plate from the back side.
Inspect the oil seal (16) and, if replacement is re-
quired, press it from the seal plate.
NOTE
The seal assembly may be removed without com-
pletely disassembling the pump by removing the
impeller through the back cover opening and using
a pair of stiff wires with hooked ends to pull the seal
parts out of the seal plate.
If no further disassembly is required, refer to Seal
Reassembly And Installation.
Shaft and Bearing Removal and Disassembly
(Figure E−2)
When the pump is properly operated and main-
tained, the intermediate should not require disas-
sembly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
Remove the intermediate drain plug (32) and drain
the lubricant. Clean and reinstall the drain plug.
Disengage the hardware (22 and 23) and remove
the bearing cap (21), gasket (20), oil seal (24) and