Flint & Walling Centrifugal Packages - CJ103 - Manual (Page 8)

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95 North Oak Street • Kendallville, IN 46755 • Copyright © 2010. All rights reserved.
MAINTENANCE
Lubrication
The pumps and motors require no lubrication.
The ball bearings of the motor have been greased
at the factory. Under normal operating conditions
they should require no further greasing.
Winterizing your Pump
Cracked pump housings caused by freezing are
not covered by warranty. To protect your pump
from freezing, for best results remove the pump
and store in a warm environment. If pump cannot
be removed from your system, remove both
drain plugs, one on the suction flange and one
at the bottom rear of the pump (see fig 2 in the
instructions.) Allow the water to completely drain
from the pump. Re-install both drain plugs and fill
pump with RV type antifreeze. Antifreeze also acts
as a rust inhibitor. It will help keep rust build up to
a minimum and seals lubricated inside the pump
while it is not in use.
ROTARY SEAL ASSEMBLY REPLACEMENT
Disassembly
When disassembling the pump, care
should be taken not to damage the gaskets. If torn or
damaged, replace with new gasket (see parts list).
1. Remove the four (4) pump through bolts that
connect the mounting ring to the pump body.
Remove the pump body, taking care not to
damage the gasket or o-ring.
2. Remove the impellers. CJ103 Models are
single stage units, having one impeller. Using
a 9/16” open end wrench, hold the motor shaft
flat and unthread the impeller by turning it
counterclockwise. The motor shaft flat area is
located in the middle of the mounting ring.
3. CJ101 models are multi stage units, having
two or more impellers and one or more
intermediate stages. Using an 11/16” open
end wrench on the motor shaft extension
flat, remove the first impeller by turning or
counterclockwise. Remove the intermediate
stage (stages) taking care not to damage the
gasket (gaskets) and unthread the remaining
impellers.
4. Remove the mechanical seal assembly. The
rotary portion of the seal assembly (carbon
ring, Buna-N gasket and spring) will easily slide
off the end of the shaft. The ceramic portion
can be pried out of the rubber seating using
two (2) screwdrivers (see Figure 13).
Reassembly
The precision lapped faces of the
mechanical seal are easily damaged. Handle the
replacement seal carefully. Short seal life will result if
seal faces (ceramic & carbon) are nicked, scratched or
dirty.
1. Clean the seal cavity of the mounting ring and
the motor shaft thoroughly.
2. Apply liquid soap (one drop only) to the outside
of the Buna-N gasket that houses the ceramic
seal seat. With thumb pressure, press the
ceramic seat, polished face up, squarely into
the seal cavity (see Figure 14).
3. If seal does not seat squarely, remove and
reclean the seal cavity. Place a cardboard
washer over the polished seal face and carefully
press into place using a piece of pipe or tubing
(see Figure 15). Discard cardboard washer.
4. Apply liquid soap (one drop only) to the inside
diameter of the rubber drive ring. Slip rubber
drive ring (carbon face down) and the spring
over the shaft.
5. Reassemble the pump by following the reverse
order of the disassembly instructions.
MOTOR REPLACEMENT
1. Nema J motors can be replaced in the field
with any standard Nema J jet pump motor by
referring to the following instructions and the
attached parts list.
Figure 13 - Remove Mechanical Seal Figure 14 - Press in Seal
Figure 15 - If Necessary, Press with
Cardboard and Pipe IL0173 IL0168 IL0169
3/4” Pipe
- Press
Carefully
NOTE:
Cardboard Washer
Protects Seal Face
Seal
Seal
Cavity