Mechanical Seal; Installing Seal Housing - Flowserve IJ Installation Operation & Maintenance

5. Disassemble inner parts of thrust bearing.
a. Remove thrust bearing shoes from top half of base ring, then lift off top half of base ring.
b. Rotate bottom half of base ring to expose remaining inner thrust bearing shoes, remove
shoes, and lift off bottom half of base ring.
6. Determine total axial movement of shaft as follows:
a. Lay strip of masking tape on parting flange of bearing housing, extending approximately
1 in (25 mm) beyond each face of the thrust collar.
b. Push shaft toward coupling end as far as possible.
c. Hold straight edge against outer face of thrust collar and pencil position of collar on tape.
d. Push shaft toward opposite end as far as possible.
e. Hold straight edge against outer face of thrust collar and pencil position of collar on tape.
f. Measure distance between marks. Distance must be equal to or greater than total shaft
movement given in OPERATING SPECIFICATIONS.
7. Reassemble inner parts of thrust bearing as instructed in step 3. above.
8. Check running position of rotor as follows:
a. Push shaft toward coupling end until thrust collar butts against faces of thrust bearing
shoes.
b. Hold straight edge against outer face of thrust collar and pencil position on tape. Measure
distance to inboard mark. Distance should equal distance D determined in last phase of
PUMP ASSEMBLY: INTERNAL ASSEMBLY above.
9. If necessary, change length of thrust collar spacer to reposition thrust collar on shaft, as
follows:
a. Disassemble inner parts of thrust bearing.
b. Remove thrust collar nut, collar, key (if installed), and spacer.
c. Reduce length by machining, or make a new longer thrust collar spacer, as required.
d. Reinstall parts.
e. Repeat steps 4. and 8. above.
10. After correct running position is verified, remove:
a. thrust bearing parts (see step 5. above),
b. bottom halves of journal bearings (51 and 63),
c. bottom halves of bearing housings (13 and 62), and
d. If the sensor disk is located inboard of the thrust bearing, remove the sensor disk (282)
and key (1292).

6.6.4 MECHANICAL SEAL

6.6.4.1 Installing Seal Housing

Install seal housing as follows:
IJ PUMP OPERATION AND MAINTENANCE MANUAL
6-35 BO2660-01