5
PO-1775F
1. When installing a new seal, always replace both elements (items
13 & 14) and install the o-ring (item 11) around the bracket half
of the seal (item 13). Do not bear directly on the seal surface
when installing the bracket half. Use a piece of pipe that will bear
only on the metal flange of the seal case. The impeller half of
the seal (item 14) may be pressed in with the thumbs. Be sure
both seal halves are seated squarely with respect to the pump
shaft.
2. During final assembly it is recommended that the 5 screw head
o-rings (item 8) be replaced. Lubricate these with a
vegetable
type oil only. (DO NOT use petroleum based oil).
3. Use a thread locking compound such as Loctite #4 on the
bracket screw (item 9) threads and on the impeller screw (item
16) threads.
4. The clearance between the impeller (item 15) vanes and the
volute (item 17) face should be about .015” to .05” for good
performance. This “front” clearance can be obtained by shim-
ming with the washer type shims (item 30) mentioned in step 3
of the disassembly instructions. Use the same shims which you
saved from step 3. Install the impeller (item 15) and firmly press
on the impeller (
hub only
) while rotating the impeller 360°. If
scraping is heard, add shim or shims until scraping noise is not
heard. Install the impeller screw and o-ring (items 16 & 8). Install
the volute (item 17) and the screws and nuts (items 21 & 4).
Rotate the shaft while listening for scraping noise. If scraping is
heard, remove the volute and impeller and remove one washer
type shim. Repeat this procedure until no scraping is heard.
5. Check the impeller vanes for proper height. The following mea-
surements should be found when measuring the vane height at
the outside perimeter of the impeller (vane tip):
VANE HEIGHT AT
*IMPELLER NO.
TIP OF VANE
58-0667
.535”
58-0704
.535”
58-0706
.535”
58-0707
.535”
58-0708
.535”
58-0709
.535”
58-0975
.975”
*See parts list for further description. The impeller
curve letter is the fifth digit of the model number on
the pump label. The impeller part number is located
on each curve on the flow charts or on the impeller
itself.
VI. SPECIAL INFORMATION
A. FLEXIBLE COUPLED PUMPS: COUPLING ALIGNMENT
Measure the diameter of the pump shaft and power unit shaft.
Choose the appropriate coupling for your pump and power unit.
(See flexible couplings charge number VI-A). Proper shaft and
coupling alignment reduces vibration and prevents premature
coupling failure. The following 8 steps help in obtaining proper
shaft alignment.
1. Make sure you use a rigid base plate large enough for the
assembly of the pump and the drive unit. We offer kits, 58-008
and 58-0016, for this purpose. (See base plate kits listed after
couplings charge VI-A).**
POWER
ELECTRIC
COUPLING
UNIT
MOTOR
PART
SHAFT*
FRAME
NUMBER
DIAMETER
SIZES
58-0785
.65”
56
58-0786
.875”
143T-145T
18-184
58-0787
1.15”
18T-184T
13-15
58-0788
1.375”
13T, 15T
FLEXIBLE-COUPLINGS CHART VI-A
*One-half of each coupling has a .750” diameter bore to fit the
pedestal pump shaft.
. Place the pump and drive unit on the base plate.
3. Measure the distance between the center line of the
pump shaft and the base plate surface.
4. Measure the distance between the center line of the
drive unit shaft and base plate.
5. Compare measurements obtained from steps 3 and 4
and use spacer blocks for height adjustment to insure align-
ment of both shafts.
6. Place the coupling halves over each shaft, put the “spider”
between the two halves and couple the two halves together.
7. To assure parallel alignment (Figure 5) place a straight edge
along the side of both coupling halves in two different locations,
90° apart. The coupling is aligned when the straight edge rests
squarely on the sides of both coupling halves.
FIGURE 5
INCORRECT
PUMP SHAFT
DRIVE SHAFT
COUPLING
CORRECT
PUMP SHAFT
DRIVE SHAFT
COUPLING
