Xylem GSSERVICE R2 Service Manual Submersible Pumps & Jet Pumps - Manual (Page 64)

62
JET
PUMPS
Jet Pump Reassembly . . .
1. Be sure that recess for seal seat and surface
where guide vane mounts on motor adapter
are entirely free of all scale and dirt.
2. Clean motor shaft.
3. Apply film of light oil, such as vegetable 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. Do not
mar lapped face of this seal. The slightest scar
or particle of dirt will cause a leak.
4. Bolt motor adapter to motor, making sure the
motor shaft does not dislocate the stationary
seal member.
5. Assemble rotating member of seal on motor
shaft. Rotating seal face must fit snugly
against lapped seal face of stationary
member in casing cover. This is accomplished
by pushing with a piece of tube against back
end of neoprene washer after oiling sleeve
and shaft. Be sure rotating seal face does not
drop out of holding collar while sliding the
rotating members of the seal on the shaft.
Also, take extra care that the rotating seal face
is not marred during handling.
6. While holding the shaft against rotating, screw
impeller on shaft by hand until tight against
shoulder of motor shaft.
7. Replace guide vane, making sure that bore
of guide vane does not bind impeller hub. If
screws used, tighten alternately and evenly.
Check by turning the motor shaft. If binding
occurs, loosen screws, readjust guide vane
until impeller hub turns freely, then tighten
screws as before. Some jets have snap-in
guide vane.