Tonkaflo Field Maintenance; Mechanical Seal Leakage; Removal And Installation Of Liquid End Assembly; Removal Of Liquid End Assembly - GE OSMONICS TONKAFLO SS Series Installation, Operation And Maintenance Manual

6.0

TONKAFLO FIELD MAINTENANCE

6.1

Mechanical Seal Leakage

If liquid is leaking from the hole on the bottom or the holes on either side of the
bearing frame near the inlet, the mechanical seal may need to be replaced. With new
pumps, pumps with new mechanical seals, or pumps which have been dormant for
long periods, the seal faces may not be completely seated and a slight leakage will
occur. If this leakage continues for more than 60 seconds, remove discharge piping
and tap pump shaft using a wooden dowel to seat the seal. Be careful not to damage
the pump shaft.
WARNING:
6.2

Removal and Installation of Liquid End Assembly

6.2.1
POWER MUST BE DISCONNECTED BEFORE MAINTENANCE.

Removal of Liquid End Assembly

Removal of the liquid end assembly is required for replacement of the
mechanical seal or for maintenance work on the pump bearing frame as
described in Sections 6.3 - 6.6. The liquid end may be removed from the
bearing frame without removing the bearing frame from the bedplate or other
mounting.
STEPS
1. Remove the four 3/8-inch bolts and lock washers connecting the liquid
end assembly to the bearing frame as shown in Figure 6.8 (Separation
of Liquid End from Bearing Frame).
2. Insert a 3/16-inch Allen (hex) wrench in one of the access holes on
either side of the bearing frame toward the liquid end. Refer to Figure
6.8 for more detail. Rotate the pump shaft until the Allen wrench slips
into the set screw. Rotate the shaft by rotating the flexible coupling.
3. Loosen the clamp on the discharge end of the pump case.
4. Remove the liquid end assembly (i.e., liquid end and pump shaft) by
pulling the liquid end away from the bearing frame. Be sure the
discharge end of the liquid end assembly is supported so that the
pump shaft is not bent upon removal.
17