EBARA EFQT3 - Manual (Page 29)

EBARA Fluid Handling 29
Seal Removal
(Figure 2)
Slide the integral shaft sleeve and rotating
portion of the seal off the shaft as unit.
Use a pair of stiff wires with hooked ends to
remove the stationary element and seat.
An alternate method of removing the
stationary seal components is to remove the
hardware (25 and 26), and separate the seal
plate (3) and gasket (5) from the bearing
housing (6). Position the seal plate on a flat
surface with the impeller side down. Use a
wooden dowel or other suitable tool to press
on the back side of the stationary seat until
the seat, O-rings, and stationary element
can be removed.
Remove the shaft sleeve O-ring.
If no further disassembly is required, refer to
seal installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and
maintenance, the bearing housing should
not require disassembly. Disassemble the
shaft and bearings only when there is
evidence of wear or damage.
Shaft and bearing disassembly in the field is
not recommended. These operations should
be performed only in a properly equipped
shop by qualified personnel.
Remove the bearing housing drain plug (23)
and drain the lubricant. Clean and reinstall
the drain plug.
Disengage the hardware (13 and 14) and
slide the bearing cap (15) and oil seal (9) off
the shaft. Remove the bearing cap gasket
(21), and press the oil seal from the bearing
cap.
Place a block of wood against the impeller
end of the shaft and tap the shaft and
assembled bearings (7 and 22) from the
bearing housing.
After removing the shaft and bearings, clean
and inspect the bearings in place as follows.
Shaft and Bearing Reassembly and
installation
(Figure 2)
Clean the bearing housing, shaft and all
component parts (except the bearings) with
a soft cloth soaked in cleaning solvent.
Inspect the parts for wear or damage as
necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ventilated
area free from excessive heat, sparks, and
flame. Read and follow all precautions
printed on solvent containers.
Inspected the shaft for distortion, nicks or
scratches, or for thread damage on the
impeller end. Dress small nicks and burrs
with a fine file or emery cloth. Replace the
shaft if defective.
Position the inboard oil seal (7) in the
bearing housing bore with the lip positioned
as shown in figure 2. Press the oil seal into
the housing until the face is just flush with
the machined surface on the housing.
To prevent damage during removal from the
shaft, it is recommended that bearings be
cleaned and inspected in place. It is strongly
recommended that the bearings be replaced
any time the shaft and bearings are removed.
NOTE
Position the inboard bearing (7) on the
shaft with the shielded side toward the
impeller end of the shaft. Position the
outboard bearing (22) on the shaft with
the integral retaining ring on the bearing
O .D. toward the drive end of the shaft.
The bearings may be heated to ease installation.
Na induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings.
Bearings should never be heated with a direct
flame or directly on a hot plate.
CAUTION!
CAUTION!
WARNING!