Pump Assembly - Franklin Electric TB1CI Manuel Du Propriétaire

A. Draining (Figure 8)
The pump should be drained if it is in danger of freezing,
if it will be out of service for an extended period of time,
or if it requires service.
To drain pump, disconnect power source, remove
priming port plug from pump case, remove drain plug
(below suction port), and drain system. Replace
drain plug.
Figure 8
NOTICE: While this will drain the pump, it will not
necessarily drain all other parts of the piping system.
If there are any concerns with the proper procedure
or necessity of draining the suction plumbing,
contact your contractor.
B. Pump Disassembly (Appendix I & Figure 9)
In order to access the internal components of the pump,
review the exploded diagram of the pump assembly as
shown on the repair parts page (Appendix I). Drain the
pump as described above and then remove the four
bolts that hold the pump case to the motor bracket. This
will allow the motor and hydraulic sub-assembly to be
removed from the case without disturbing the plumbing.
Locate and inspect the diaphragm and grommet which
are internal water seals. Make sure they are in good
condition and are working properly. To remove the
diffuser, loosen the three bolts that attach it to the motor
bracket. This will expose the impeller and eye-seal.
Remove the eye-seal. In order to remove the impeller,
remove the cover from the opposite end of the motor
and hold the shaft with a 7/16" open end wrench. The
motor shaft is flattened behind the centrifugal switch,
close to the motor end bell. The open end wrench can
be inserted down into the shaft from behind the motor
overload. Unscrew the impeller from the motor shaft
by grasping the OD of the impeller with a gloved hand
and rotating counterclockwise. This will reveal the
mechanical shaft seal. This seal can then be removed
from the motor shaft for inspection. The motor bracket
can be removed from the motor by removing the four
bolts on the backside of the motor bracket. To remove
the ceramic shaft seal, press gently from the backside
on the ceramic and it will fall out easily. Inspect, clean or
replace parts as needed.
Priming Port
Drain Plug
C. Pump Assembly
Reassemble unit by first pressing the ceramic seal
into the seal plate. Use rubbing alcohol as a lubricant.
Do not use an oil, petroleum jelly or grease as this will
damage the sealing surfaces of the shaft seal during
operation. Next, install the motor bracket onto the motor
using the four bolts. Tighten the bolts in a diagonal
pattern to ensure a proper fit. Place the shaft seal on the
motor shaft and then install the impeller and eye-seal.
The diffuser is positioned by three bolts that can only be
installed when the diffuser is oriented properly (Figure
9). Position the diaphragm on the diffuser suction eye.
(as shown in Figure 9). The grommet will slide over the
diffuser eye on top of the diaphragm. Lift the motor
assembly up into the pump case and attach it using
the four bolts. When seating the pump case against
the motor bracket, the diaphragm should be captivated
between them around the entire perimeter. This allows
the diaphragm to serve as a water seal between the
two cast iron parts. If the diaphragm is not positioned
correctly the unit will leak once the case is filled with
water. Tighten all bolts to 185 in-lbs in a diagonal
pattern to ensure proper seating of all components.
Motor
Bracket
Diffuser Bolt
Diffuser
Diffuser Bolt
Diaphragm
Grommet
Figure 9