Gorman-Rupp Pumps 16A2-F3L 1317807 and up - Manual (Page 32)

OM−00698 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)
Support the pump casing using a suitable hoist
and sling. Remove the nuts (26) and separate the
pump casing and casing gasket set (52) from the
seal plate (51) and intermediate (32). Replace the
gasket set as required.
Remove any leveling shims used under the casing
mounting feet. Tie and tag the shims for ease of
reassembly.
Impeller Removal
(Figure 2)
Turn the cross arm on the automatic lubricating
grease cup (27) clockwise until it rests against the
cover (see Figure 6). This will prevent the grease
from escaping when the impeller is removed.
Unscrew the impeller in counterclockwise direc-
tion (when facing the impeller). 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 (22) off the im-
peller shaft (44). 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 (27, 29 and 30). 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 (38) 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 bearing housing should not require dis-
assembly. 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 (48) and drain
the lubricant. Clean and reinstall the drain plug.
Disengage the hardware (34 and 35) and remove
the bearing cap (36), gasket (33), outboard oil seal
(45), and wavy washer (46). Press the oil seal from
the bearing cap.