Xylem IM129 R01 BF03S - Manual (Page 5)

5
To Reassemble:
Be sure that recess for seal seat is free of all dirt and scale.
Apply a thin film of light oil to the recess of the motor
adapter and the neoprene bushing before installing the new
seal seat. This is a tight fit, but it must go in all the way
evenly or a leak will result. It can be pushed in with the two
thumbs. Do not mar lapped face of this seal. The slightest
scar or particle of dirt will cause a leak.
Assemble rotating member of seal on motor shaft. Rotating
seal face must fit snugly against lapped seal face of station-
ary member in motor adapter. This is accomplished by plac-
ing the rotating seal, sealing face toward stationary seat, on
the shaft. Use the impeller to drive and seat the rotary seal.
Place gasket on motor adapter being careful the holes in
gasket line up with openings in the adapter. If gasket is
badly worn or has been damaged in any way, replace with a
new one.
While holding the shaft against rotating, as described in
A.O. Smith motors, page 4, screw impeller on shaft by hand
until tight against shoulder of motor shaft.
Replace guide vane, making sure that bore of guide vane
does not bind impeller hub, tightening screws alternately
and evenly. This can be checked by turning the motor shaft.
If binding occurs, loosen screws, re-adjust guide vane until
impeller hub turns freely, then tighten screws as before.
Replace entire assembly in casing making sure gasket is flat
all the way around and has not been damaged. Also check
that the guide vane seal ring is in place on the venturi.
Insert and tighten all casing bolts evenly.
Reconnect wires to pressure switch.
Close drain opening, using pipe joint compound on threads
of plug.
REFILL PUMP WITH WATER BEFORE STARTING.
See priming instructions.
LOCATING TROUBLE
IF YOUR UNIT FAILS TO FUNCTION PROPERLY
If your Goulds Water Technology BF03S Water System fails
to operate properly after the foregoing instructions have
been followed, the trouble can usually be traced to certain
simple causes. Such as inadequate priming, air leaks in the
suction line, foreign matter in system, low voltage in power
line causing low motor speed, insufficient flow from well
or other source of supply, excessive suction lift, or a house
service line that is too small or too long causing excessive
friction loss. The following suggestions for locating troubles
should be followed in the order given, making sure that
each step does not remedy the trouble before trying the
next one.
IF PUMP RUNS BUT DOES NOT DELIVER WATER
NOTE: On long suction lines it may take considerable time
for the pump to exhaust all of the air in the suction
pipe and start to deliver water. When starting the
pump under these conditions, always leave a faucet
open for the air to escape. If there is a foot valve
on the end of the suction line, filling the suction
piping with water before starting will shorten the
time required for the pump to start delivering
water.
1. Examine pump by removing priming plug to see if it is
full of water. NOTE: Three quarts of water poured in
priming opening is sufficient to prime pump.
2. Check source of supply to see if there is an ample supply
of water available and that the end of suction pipe is
submerged in water but not buried in mud.
3. Check motor rotation. Make sure that motor runs in
direction indicated by arrow on pump casing cover.
Diagram Showing Dismantled Rotating Assembly
Figure 4
CASING
COVER
MECHANICAL
SEAL
IMPELLER
GUIDE
VANE
MOTOR
ROTATING
MEMBER
GASKET GUIDE VANE
BOLT
GUIDE VANE
SEAL RING
SEAL BORE
STATIONARY
MEMBER
LOCATING TROUBLE
Figure 3