Gorman-Rupp Pumps 16C2-F4L 1319251 and up - Manual (Page 31)

OM-00725 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 4. Loosening Impeller
Pump Casing Removal
(Figure 2)
Remove the nuts (16) securing the pump casing to
the seal plate (48). Use the standard 5/8-11 UNC
lifting eye in the tapped hole in the top of the pump
casing and a hoist and sling of suitable capacity to
separate the casing from the seal plate and inter­
mediate.
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 casing gaskets (49) and any leveling
shims used under the casing mounting feet. Tie
and tag the gaskets and shims for ease of reass­
embly.
Impeller Removal
(Figure 2)
With the impeller (2) loosened as previously de­
scribed, unscrew it from the shaft. Use caution
when removing the impeller; tension on the shaft
seal spring will be released as the impeller is un­
screwed. Inspect the impeller and replace if
cracked or badly worn.
Slide the impeller adjusting shims (31) off the im­
peller shaft (42). Tie and tag the shims or measure
and record their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figure 2)
To remove the seal assembly (3), remove the
grease cup and piping (17, 18 and 19). Slide the
seal plate and seal parts off the shaft as a single
unit. Be careful not to drop or damage any seal
parts.
Carefully remove the stationary and rotating seal
elements, packing rings, seal spring, and shaft
sleeve 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.
Inspect the seal liner (76) for wear or grooves
which could cause leakage or damage to the seal
packing rings. The seal liner is a press fit in the seal
plate, and does not normally require replacement.
If replacement is necessary, see Seal Installation.
If no further disassembly is required, refer to Seal
Reassembly And Installation.
Shaft and Bearing Removal and Disassembly
(Figure 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