Great Plains 3P300 Operator Manual - Manual (Page 53)

Great Plains Manufacturing, Inc. Maintenance and Lubrication 49
09/14/2009 500-103M-A
Ace Belt Drive Pump Seal Replacement
Refer to Figure 31
1.
Loosen 4 3 ⁄
8
in x 3 ⁄
4
in long hex screws which attach
the pump volute to the mounting frame. Remove
volute from mounting frame.
2. Remove impeller from pump shaft. Use file or sim-
ilar tool to unscrew in clockwise direction (left hand
thread).
3. Ceramic rotating portion of the seal may now be
removed.
4. Using two screwdrivers inserted in mounting frame
weep holes, pry non-rotating portion of the seal
toward the threaded part of the shaft and finish
removing by hand.
5. If seal case is difficult to extract from the mounting
frame seal bore, two screwdrivers may be used to
further dislodge the seal.
6. Apply a small portion of non-hardening sealant to
new seal case to assure good seal mounting frame
bore. Insert case into bore.
7. Make sure non-rotating seal portion is properly
seated by tapping lightly with suitable tool.
8. Place o-ring over pump shaft and slide downward.
Oil face of new ceramic portion with light lubricating
oil and place over o-ring and press downward to con-
tact with the stationary portion.
9. Install impeller on shaft (left hand thread). Tighten by
inserting a file or similar tool into impeller vane and
turn counter-clockwise while holding shaft steady.
10. Replace gasket , volute, and four 4 3 ⁄
8
in x 3 ⁄
4
in long
hex screws.
Figure 31
Ace Belt Drive Pump Seal
16141
1
2
3
4
5
6