Goulds Pumps 3420 - IOM - Manual (Page 50)

M Group (Figs. 34-37)
1. Loosen the set screw (222P) and slide the dust cover
(123A) towards the coupling.
2. Remove the bearing cap hex nuts (425A) and the
bearing caps (111A). Match-mark each bearing cap.
They must be replaced on the same end and in the
same position on the pump during reassembly.
NOTE: The casing and the bearing caps are machined
as a matched set.
$
CAUTION
Failure to reassemble the pump with the bearing caps
in the correct position could result in damage to the
pump.
3. Place the sling in position, refer to Fig. 33. Adjust the
sling tension to take weight off of the rotating
element. Make sure all stationary parts of the rotating
element are loose before the rotating element is
removed. It is desirable to rotate the casing wearing
rings (127), stuffing box bushings (125), and the
bearing housings (134A) 180
° to disengage the tongue
and groove locks.
4. Remove the element and place it on padded supports.
5. Slide the casing rings off the rotating element.
6. Scribe the coupling position on the shaft (122) and
remove the coupling and the coupling key (400).
7. Unbolt and remove both bearing end covers (109A
and 119A).
8. Oil Lubrication: Remove the oil rings (114) and the
oil ring housings (515).
Grease Lubrication: Remove the oil ring housings
(515).
9. Loosen the set screws (363B) in the oil throwers (248)
and slide them toward the shaft sleeves (126).
10. Straighten the tangs in the lockwashers (382) and
remove both bearing locknuts (136) and lockwashers.
11. Slide the oil ring sleeves (324/323 or 207/208) off of
the shaft.
NOTE: On grease lubricated units, a grease shield
(346A) is mounted on the oil ring sleeves (207 and
208).
12. Remove the bearings (112A and 168A) using the
bearing puller shown in Figs. 23 and 24 and as
documented in Section 5. Save the bearings for
inspection.
13. Slide the bearing housings off of the shaft.
14. Slide the oil throwers off of the shaft.
46
3420 IOM 8/09