1.
Remove the casing parting nuts. Remove dowel pins (1A). Loosen top half casing by inserting
four ½"-13 NC bolts into parting flange. Remove top half casing using the eye bolts. Do not use
eye bolts to lift enter pump. Exercise care to prevent the gasket from tearing.
2.
Remove bearing caps. Match-mark each bearing cap. They must be replaced on the same end
and in the same position on pump during reassembly.
3.
Place sling in position (see
Figure 30: Rotating element on page 36
) and take weight off ele-
ment. Make sure all stationary parts of rotating element are removed. It is desirable to rotate cas-
ing wearing rings, stuffing box bushings and bearing housings 180 degrees to disengage tongue
and groove locks.
NOTICE:
•
On units with ball bearings, remove element and place on padded supports.
•
On units with sleeve bearings, see
Figure 33: Ring oil lubricated bearings on page 38
1.
Unbolt and remove bearing end cover on outboard end of pump. Preserve gasket.
2.
Loosen set screws in dust covers and slide covers away from bearings.
3.
Remove top half bearing adapters and bearing shells. Match-mark shells and adapters as
they must be replace on the same end and in the same position during reassembly.
4.
Rotate lower bearing shells and adapters to top of shaft and remove. Oil rings must be
lifted slightly to allow removal of bearing shells and adapter. Remove element and place
on padded supports.
4.
Mark coupling position on shaft and remove coupling and key.
5.
Slide casing wearing rings off element.
6.
Loosen set screw and remove dust cover (or deflector) from coupling end of shaft.
7.
The standard bearings are ring oil lubricated ball bearings. However, grease lubrication and
sleeve bearings are optional. Specific bearing disassembly procedures for each type are given
below. Select the appropriate procedure and follow it carefully.
Figure 30: Rotating element
A. Ring oil lubricated ball bearings
B. Grease lubricated ball bearings
6.3 Disassembly of pump
36
Model 3415 Installation, Operation, and Maintenance Manual
