Gorman-Rupp Pumps 02K11-B 740364 and up - Manual (Page 28)

OM-01157 0 SERIES
MAINTENANCE & REPAIR PAGE E - 9
Impeller Installation
Inspect the impeller and replace it if cracked or
badly worn.
For maximum pump efficiency, the impeller should
be centered within the vane plate scroll.
To verify the impeller positioning, measure the
vane plate and impeller as shown in Figure 4. Use
these measurements to calculate the required im­
peller location (dimension E). Add or remove im­
peller adjusting shims (17) until dimension E is ob­
tained.
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 Vane Plate Scroll
Install the correct thickness of impeller shims (17)
and screw the impeller onto the shaft until fully
seated.
Apply “Loctite Threadlocker No. 242” or equivalent
compound to the impeller shaft threads and se­
cure the impeller with the impeller nut (6). Torque
the nut to 30 ft. lbs. (360 in lbs. or 4,15 m. kg.).
Clean all of the old adhesive from the vane plate
and its mating surface on the intermediate. Apply a
thin film of “3M Gasket Adhesive No. 847” or equiv­
alent compound to the vane plate and secure the
vane plate to the intermediate bracket using the
hardware (5 and 6). Assemble the shorter machine
screw (1) at the 11 o'clock position on the vane
plate.
NOTE
After the vane plate has been installed, check for
free shaft rotation. Correct any scraping binding
before further reassembly.
Pump Reassembly
Install the vane plate O‐ring (32) onto the vane
plate. Install the casing gasket (25). Ease the pump
housing over the vane plate. Be careful not to
damage the O‐ring. Secure the housing to the in­
termediate bracket with the nuts (8).
Final Pump Assembly
Be sure the pump and power source are securely
mounted to the base. Reconnect the power source
to the pump.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Fill the pump casing with clean liquid. Reinstall the
fill plug (4) 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. No additional lubrication is required.