Motor, Pump, And Coupling Alignment - GE OSMONICS TONKAFLO SS Series Installation, Operation And Maintenance Manual

3.5 Motor, Pump, and Coupling Alignment (Applicable for Direct Drive)
Accurate alignment of the motor, pump and coupling is a "MUST."
The final alignment of the motor, pump and coupling is to be done after the bedplate
is rigidly mounted (Section 3.3, Foundation), with the unit in its final operating position.
Shipment, as well as handling in the field, may have changed the alignment, and it is
essential that the alignment be checked before operating the pump. To check
alignment:
Shims are placed under the motor mounting pads to facilitate adjustment. Use a
straight edge, feeler gauges, and a 1/2- to 1-inch taper gauge (or telescope gauge
and micrometer) to perform the steps shown in Figure 3.2 [Coupling Alignment (2a, 2b,
2c, and 2d)].
If the pump has been supplied complete with motor, pump, coupling and coupling
guard, remove the coupling guard. Loosen the coupling flange on the motor shaft
and remove the coupling sleeve.
If the pump is not supplied as a complete unit, slide one coupling flange onto the
pump shaft with a snug-fitting key. With the flange and key flush with the shaft end,
tighten the set screws.
Slide the coupling flange onto the motor shaft with shaft key and position the motor
on the bedplate.
Measure horizontal and vertical alignment (Figure 3.2, 2a & 2b) using a straight edge
and feeler gauges. Align the coupling to the accuracy noted in Figure 3.2 (2a & 2b)
using the shims provided and placing them under the motor mounting feet as needed.
Measure angular alignment of the flanges using a 1/2- to 1-inch (1.27 - 2.54 cm) taper
gauge or telescope gauge and micrometer. Taper gauge as shown on Figure 3.2 (2c
& 2d). Align the coupling to the accuracy noted in Figure 3.2 (2c & 2d).
For best coupling life, keep the misalignment values as near to zero as possible.
Insert the wire ring and two-piece coupling sleeve between the two coupling flanges.
Slide the wire ring into the groove on the sleeve halves and slide the flange along the
motor shaft to fully seat the sleeve between the two flanges. Adjust the gap between
the flanges to the values shown in Figure 3.2 within ±1.6 - 1.0 - inch (±1.5- 0 mm).
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