Page 59 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

44 Major Process Equipment Maintenance and Repair

After inspections have been carried out and proper clearances verified,
these data should be logged for future reference. When all parts are
cleaned and corrected as necessary, reassembly can be made as follows:

1. Slide deflectors (29) on shaft against sleeve lock nut.
2. Bring bearing housing lower halves up, install dowels and bolt
into place.
3. Place oil rings over shaft into correct housing pocket.
4. Oil shaft and sleeve bearings and “roll” lower half bearings into
housing.
5. Push hst bearing spacer onto shaft. Note: This spacer is ma-
chined to special width for each pump to obtain correct setting of
shaft in relation to stuffing box face.
6. Assemble thrust bearings into bearing mounting sleeve and install
as a unit on shaft (duplex bearings are mounted “back-to-back”).
7. Assemble in sequence the following parts:

a. Oil ring collar
b. Bearing lock washer
c. Bearing lock nut (214)
d. Oil ring (17)
e. Top half of sleeve bearings
f. Top half of bearing housings

8. Without gaskets, push thrust bearing end cap into position and
tighten cap screws between housing and cap finger tight.
9. Measure gap between housing and end cap and remove bearing
end cap.
10. Place gaskets with a thickness of .003 in. greater than the mea-
sured gap over end cap and install cap. Draw cap screw down
tight.
11. Check shaft assembly for end play. End play should be .001 in. to
.003 in.
12. Slide deflectors into place and lock to shaft with socket head set
screws.
13. Rotate shaft and check that it is free to rotate and does not bind.
14. Reinstall coupling. Make sure coupling is firmly seated on shaft
and coupling does not interfere with proper mounting.
15. Fill housing with proper grade of oil.
16. Check alignment of unit and lubricate coupling (lubricated type
only).