Gorman-Rupp Pumps 03F52-B 1329227 and up - Manual (Page 27)

OM-01190 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 volute scroll inside the
pump casing.
To verify the pump casing positioning, measure the
pump casing and impeller as shown in Figure 4.
Use these measurements to calculate the required
pump casing location (dimension E). Add or re­
move pump casing gaskets (23) until dimension 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 Volute Scroll
Remove the two capscrews and nuts used to tem­
porarily secure the seal plate to the pedestal and
secure the casing to the seal plate and pedestal
with the nuts (8). Install the proper thickness of cas­
ing gasket(s) (9) as calculated above in Figure 4.
NOTE
After the pump casing has been properly posi­
tioned, check for free impeller rotation. Correct any
scraping binding before further reassembly.
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 (6) 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, add No.
0 lithium based grease from a grease gun through
the hole for the vented plug (10) after each 250