Gorman-Rupp Pumps 03F3-B 463273 and up - Manual (Page 28)

OM-01189 0 SERIES
MAINTENANCE & REPAIR PAGE E - 9
The wear ring must seat squarely in the
casing bore or binding and/or excessive
wear will result.
For maximum pump efficiency, the impeller should
be centered within the pump casing.
To verify the impeller positioning, measure the
pump casing and impeller as shown in Figure 4.
Use these measurements to calculate the required
impeller location (dimension E). Add or remove
gaskets in the pump casing gasket set (23) until di­
mension E is obtained.
D
B
2
A B
2
C D
E
Step 2 Step 1 Step 3
A+
B
2
C+
D
2
E = -
Figure 4. Centering Impeller Within Pump Casing
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the calculated
thickness of casing gaskets (23) as previously re­
moved and secure the casing to the seal plate and
pedestal with the nuts (8). Reinstall any leveling
shims under the casing mounting feet, and secure
the casing to the base with the previously removed
hardware.
NOTE
After the pump casing has been installed, check for
free shaft rotation. Correct any scraping binding
before further reassembly.
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 (34) 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. Under normal conditions, remove
the vented plug (10) and add one shot of No. 0 lithi­
um base grease from a grease gun after each 250