C. Ring oil lubricated bearings
Figure 33: Ring oil lubricated bearings
The first fours steps in the disassembly procedure of sleeve bearings are outlined in Step
3.
(c-5) Lift oil rings off shaft.
(c-6) Straighten tang in lock washer and remove outboard end bearing lock nut and
washer.
(c-7) Remove ball bearing using a bearing puller as shown in
. Care must be used to prevent damage to bearing. Never use a hammer to
drive shaft through bearings. Protect bearings from contamination.
(c-8) Go to Step 8.
8.
Slide inboard bearing end covers, oil throwers, dust covers, and deflectors (if any) off shaft. Pro-
tect grease seals on grease lubricated pumps.
9.
If unit has mechanical seals, slide glands, with stationary seat in place, off shaft. Use care to pre-
vent damage to lapped seal faces. Rotary portion of seal and stuffing box bushing can be left on
sleeve until sleeve is removed. If unit has packed stuffing boxes, remove packing, lantern rings
and stuffing box bushings.
10. Loosen set screws in shaft sleeve nuts. Using a spanner or strap wrench, remove sleeve nuts.
One nut has right hand threads, the other left hand threads. Nuts tighten against pump rotation.
Preserve O-rings.
11. Smooth shaft with fine emery cloth so sleeves will not bind upon removal.
12. Carefully slide sleeves off shaft. If pump has mechanical seals, then rotary portion of the seal and
the stuffing box bushings will be attached to the sleeve and can be removed later, if required.
Protect O-rings located in the end of the sleeve nearest the impeller.
13. Lightly scribe a line on the shaft near the impeller hub. This will determine the proper position of
the impeller on the shaft. Drive or press impeller off shaft. Do not damage impeller hub surface
which is sealed be sleeve O-ring. Remove key.
6.3 Disassembly of pump
38
Model 3415 Installation, Operation, and Maintenance Manual