172-65116M-02 (CP-N) 16 Jun 2011
8
Coupling pump and motor
The pump shaft should be in alignment with the motor shaft. Follow the instructions
below.
1. Align the pump and motor as shown in Fig. A, using a straight edge applied to the
circumferential surfaces of the couplings and a wedge inserted between the flange
surfaces.
2. The distance and parallelism should be checked at four points 90 degrees apart and
should be within 0.05 mm.
3. Before coupling the pump with the motor, check the rotational direction of the motor.
The rotation should be clockwise when viewed from the motor side as shown by the
arrow mark on the bearing case.
4. After identifying the rotational direction, couple the pump with the motor. Coupling
should be done with help of the tally marks punched on the coupling flanges.
5. After the pump reaches the rated temperature, check the alignment again.
Fig. A
Cooling of shaft seal
The shaft seal should be cooled when the liquid temperature exceeds 105
°
C.
Cooling water passes through the jacket formed between the pump casing cover and
bracket. The cooling water temperature should be below 35
°
C and the difference
between inlet and outlet temperatures should be within 10
°
C. For ease of identifying the
flow and temperature of cooling water, a thermometer and a flow sight (sight glass) are
recommended to be installed on the cooling water line. Allow the cooling water to flow
for some time after stoppage of the pump.
Lubrication
If the bearings are oil bath lubricated, fill with oil before start up.
Refer the pump unit manual for the recommended lubricant and maintenance of
lubricant.
Motor shaft
Straight edge
Pump shaft
Tally mark
Wedge gauge
