ITT GOULDS PUMPS 3316, Инструкции по установке, эксплуатации и обслуживанию

Страница: 48 / 51

Now tighten shaft sleeve (104) against impeller until the marks, which were made previously, line up
indicating that the keyways are in line. Check again the distances "C" and "D". If rubbing occurs,
turn the shaft sleeve (104) one half of a turn or a complete turn ahead or back as required. With the
locating marks together, tap the key (178) into the shaft sleeve (104) until the end of the key is flush
with the end of the impeller hub (101).
Tighten the shaft sleeve (126) securely against the impeller with a spanner or a strap wrench and
tighten the set screw in the sleeve.
25. Check the rotating element for free turning by rotating slowly in one direction and then the other.
The casing rings and the stuffing box bushings should be seated in the lower half casing, and
should remain stationary when the shaft is rotated. If they ride on the impeller or sleeves, it may
indicate that the bearing housings, wearing rings or bushing surfaces in the lower half casing have
not been properly cleaned of scale or other foreign matter, or that there is too much eccentricity in
the element, due to a bent shaft or other causes. If any of the above are evident, correct the cause
and continue to assemble as follows.
26. Assemble bearings caps (111) and tighten the nuts evenly, being sure that the bearing caps are re-
placed on the same end from which they were removed.
27. Check again for free turning of the rotating element.
28. Place the parting gasket in position over the studs on the lower half casing with the edge flush with
the stuffing box bores and tight against the wearing rings and stuffing box bushings.
29. Be sure that the "locks" on the stuffing box bushing and wearing rings are in their correct position
with the single "locks" on top. Lower carefully the upper half casing, which should settle into position
without resistance. Slip the dowel pins in place. Check the rotating element for free turning and, if
no binding is apparent, tighten casing parting nuts alternately on each side of the pump starting
from the center. The shaft should turn freely after all nuts are tightened.
30. Clamp an indicator to the pump so that the button rests against the end of the shaft. Push the shaft
back and forth as far as
possible. Total end play must be at least 0.001", and not more than 0.008". If end play is less than
0.001", add thrust end bearing end cover gaskets (360A) made from 0.006" thick Vellumoid paper. If
end play is greater than 0.008", remove gaskets. Because of machining tolerances, thrust bearings
may vary in width by 0.020". A correctly assembled pump may require as few as one, or as many
as three, 0.006" thick gaskets.
31. Repack stuffing boxes and replace gland assemblies as outlined in Stuffing boxes.
32. Check coupling alignment as outlined in Alignment - initial.
33. Connect coupling as outlined in
2.9 Connection of coupling on page 17 .
34. Oil pump bearings as outlined in 3.1 Pump bearings on page 18 .
35. Connect auxiliary piping.
36. Follow directions in Preparation for Operation for initial operating conditions and for starting pump.
7.12 Changing rotation of pump in field
The rotation of these pumps can be changed without using additional parts. The following steps should
be followed:
1. Disassemble pump as outlined in 7.5 Dismantling of pump on page 32 .
2. Loosen dowel pins, if used, in pump feet and remove hold-down bolts. Lift lower half casing from
bedplate.
3. Turn lower half casing 180° so that suction and discharge flanges are reversed from previous posi-
tion or turn bedplate 180° and leave pump casing in original position. See
Figure 20: on page 39 ,
showing right and left hand pump.
4. Replace lower half casing in this new position on bedplate and bolt in place. Do not dowel.
5. Reassembly pump as outlined in 7.11 Reassembly of pump on page 41 , for new direction of rota-
tion.
7.12 Changing rotation of pump in field
46 3316 Installation, Operation and Maintenance Instructions