Goulds Pumps NM3171 - IOM - Manual (Page 25)

REASSEMBLY
This procedure covers reassembly of pumps after
complete disassembly. Make sure all Inspection and
Parts Replacements Guidelines above have been
followed.
All parts should be clean before assembly. This is
especially important for O-ring grooves, threads,
lock fits, and gasket surfaces. Any burrs should be
removed.
If access permits, it is recommended that the pump
be reassembled in vertical position. If necessary to
reassemble pump in horizontal position, be sure to
properly support shaft (122) and shaft column
assembly (192).
NOTE: Refer to Chart C-1 (Appendix I) for
recommended torque values.
1. Slide mounting plate (189) and adapter (108)
assembly on shaft (122) from motor end and
past ball (thrust) bearing (112) location.
2. Install vapor seal (215A).
3. Install new lower lip seal (333A) (if required) in
bearing housing (134).
4. Slide bearing housing (134) on shaft (122). Be
careful not to damage lip seal (333A).
5. Lubricate bearing seat on shaft (122) and slide
the ball bearing (112) as far as possible by
hand. Place pipe or driving sleeve over shaft
against inner race of bearing. Make sure bearing
is "square" on shaft. Tap or press evenly until
bearing is seated firmly against shaft shoulder.
Do not mar the shaft.
6. Place bearing lockwasher (382) on shaft (122).
7. Tighten bearing locknut (136) firmly on shaft
(122).
8. Bend "tang" of bearing lockwasher (382) into
slot in bearing locknut (136).
9. Pull bearing housing (134) over ball bearing
(112) until firmly seated against bearing.
10. Install new upper lip seal (332) (if required) in
bearing end cover (109).
11. Install bearing housing O-ring (496) in groove in
bearing housing (134).
12. Slide bearing end cover (109) over shaft (122)
and seat in bearing housing (134). Be careful
not to damage lip seal (332).
13. Install impeller adjustment screws (370D) and
bearing end cover screws (370C).
14. Lubricate outside surface of bearing housing
(134).
15. Pull mounting plate (169) and adapter (106)
assembly over bearing housing (134). If
assembly becomes cocked, push apart and
realign. It may be necessary to use bearing end
cover screw (370C) to seat bearing housing in
adapter (106).
16. Slide first column pipe assembly (192) over
pump shaft (122) and fasten to protector plate
(215) using screws (371Z). Make sure vent hole
is toward protector plate.
17. Slide a column bearing assembly (213) against
the column pipe assembly (192) flange. Make
sure drilled flush opening in column bearing
assembly matches location of holes in mounting
plate (169).
18. Install additional column pipes (192) and column
bearing assemblies (213), if any, using screws
(3728).
NOTE: All column bearings (213), except the
last, are to be installed with the bearing
retaining lip facing toward the casing (100).
The last, and in cases where there is only
one bearing assembly, install with bearing
retaining lip facing the motor end of the
pump.
19. Place pump cover (180) against last column
bearing (213).
20. Fasten pump cover (180) to column assembly
(192) using screws (371W).
21. Apply O-ring lube to pump cover O-ring (412Z).
22. Place O-ring in groove of pump cover (180).
23. Apply a small amount of O-ring lube to impeller
O-ring (412A).
24. Install O-ring (412A) in impeller (101).
25. Place new anti-rotation pin (445A) in hole in
shaft threads.
NOTE: Make sure shaft threads and impeller
insert threads are clear of dirt, grease and
oil. Scrube or wipe clean if necessary.
NM 3171 IOM 5/08
19