Page 55 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

40 Major Process Equipment Maintenance and Repair

10. Remove sleeve gasket (15-3).
1 1. Slide seal gland (07-2) from shaft (20).
12. Pull stationary mechanical seal from gland.
13. Remove gland gasket (15-2) and mechanical seal O-ring.
14. Press throttle bushing (47-3) from gland.
15. Grind off weld between cover (02) and case ring (08-2), and re-
move case wear ring (08-2).
16. Press throat bushing (47-1) from cover (02).
17. Follow separate instructions for dismantling bearing housing.

Dismantling Bearing Housing
After dismantling the casing cover, the bearing housing can be disman-
tled (Figure 1-15).

1. Remove pump half coupling.
2. Remove deflectors (29- 1 and 29-3).
3. Remove outboard end cap (13-2).
4. Slide shaft assembly out of bearing housing.
5. Remove ball bearing locknut and lockwasher (21-4 and 31).
6. Remove thrust bearing (81-2) and radial bearing (81-1).
7. Remove oil flinger (29-2).
8. “Tap-out” inboard bearing end cap (13-1).

Dismantling of Between Bearings Process Pump

General: The process pump shown in Figure 1-16* allows for com-
plete change-out of bearings and mechanical seals without the necessity
of disassembling the impeller or casing. To provide clear understanding,
the disassembly and reassembly procedures have been broken down into
specific sections:

Bearing housings-ball bearing construction
Bearing housings-sleeve bearing construction
Stuffing boxes with various sealing arrangements
Complete disassembly of pump rotating element

After the pump has been shut down and the motor secured in the off
position, drain pump casing of all liquid. Drain oil from bearing housing
and disconnect water and flush piping where necessary.

* Courtesy Union@ Pump (Canada) Ltd. Note that these procedures are typical and may
have to be modified to suit different pump models.