9
d. To install new seal assembly, oil the face and
outer surfaces of the seal seat. Press seats
into the seal gland and seal head (41) cavity. DO
NOT SCRATCH FACE OF FLOATING SEATS.
e. Apply a thin coating of light oil (not grease) to the
shaft sleeve and inside of bellows. Slide the seal
gland assembly onto the shaft sleeve (3)
followed by the gland gasket. Carefully wipe
the face of the seal face carbon with light oil and
slide it onto shaft sleeve, followed by the retainer
and bellows assembly. Assemble as shown in
Figure 4. Next place the spring over the fi rst
section of seal then slide the second bellows
retainer and seal face carbon onto the shaft
sleeve. Carefully wipe the face of seal face
carbon with light oil.
f.
Place the seal head (41) over the shaft with slots
for bolts and nuts on the horizontal centerline
when the holes in the fl ange of the seal
head are in line with those of the support head.
Insert casing capscrews through holes in support
head, and position gasket on seal head. Replace
seal gland and bolts. Complete assembly of
liquid end as described in “Reassembly of Liquid
End”.
NOTE:
Model number, pump serial number and part
item number are always required to secure correct
replacement parts. Refer to the pump serial plate and
illustrations in this booklet.
F - LOCATING TROUBLE
1. No Liquid Delivered
a. Pump not primed - See Priming
b. Speed too low - Check motor speed and
nameplate
c. Discharge head too high
d. Suction lift over 15 feet. Check with vacuum
gauge.
e. Impeller completely plugged
f. Wrong direction of rotation - Check wiring
2. Not Enough Liquid Delivered
a. Air leaks in suction piping
b. Speed to low - Check motor speed
c. Discharge head higher than anticipated.
d. Suction lift over 15 feet. Check with vacuum
gauge.
e. Impeller partially plugged
f. Not enough suction head for hot water.
g. Mechanical defects. Impeller or casing worn or
damaged
h. Foot valve too small
i. Foot valve not immersed deep enough.
3. Not Enough Pressure
a. Speed too low - Check motor speed
b. Air or gas in liquid
c. Mechanical defects. Bent shaft or impeller
binding
d. Impeller diameter too small
4. Pump Works For A While Then Quits
a. Leak in suction line
b. Suction plugged
c. Suction lift over 15 feet. Check with vacuum
gauge
d. Air or gas in liquid
5. Pump Takes Too Much Power
a. Speed too high
b. Head lower than rating - pumps too much liquid.
Check system requirements
c. Liquid either viscous or heavier than water, or
both.
d. Mechanical defects.
