Gorman-Rupp Pumps 03A52-B 1327255 and up - Manual (Page 28)

OM-01177 0 SERIES
MAINTENANCE & REPAIR PAGE E - 9
D
B
2
A B
2
C D
E
Step 2 Step 1 Step 3
A+
B
2
C+
D
2
E = -
Figure 3. Centering Impeller Within Volute Scroll
Install the correct thickness of impeller shims and
install the impeller key (20) in the shaft keyway.
Align the impeller keyway with the key and slide the
impeller onto the shaft until fully seated.
NOTE
After the impeller has been properly positioned,
check for free rotation. Correct any scraping bind­
ing before further reassembly.
When the impeller is properly positioned, secure it
with the hardware (37, 38 and 39).
Pump Reassembly
If removed at disassembly, press the replacement
wear ring (40) into the pump casing until it seats
squarely against the shoulder bore.
The wear ring must seat squarely in the
casing bore or binding and/or excessive
wear will result.
Install the casing gasket (8) and secure the casing
to the seal plate and pedestal with the nuts (35).
Reinstall any leveling shims under the casing
mounting feet, and secure the casing to the base
with the previously removed hardware.
Final Pump Assembly
Be sure the pump and power source are securely
mounted to the base.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Be sure the pump, pedestal and power source
have been properly lubricated, see LUBRICA­
TION.
Fill the pump casing with clean liquid. Reinstall the
fill plug (49) and tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Seal Assembly
The seal assembly is lubricated by the medium be­
ing pumped and no additional lubrication is re­
quired.
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (28)
and maintain it at the
middle of the gauge. When lubrication is required,