ITT Goulds Pumps 3405, Инструкции по установке, эксплуатации и обслуживанию

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35. Follow directions in 3 Preparation for operation on page 20 for initial operating condition and for
starting pump.
7.6 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 7.4 Dismantling of pump on page 45 .
2. Loosen dowel pins, if used, in pump feet and remove hold down bolts. Lift lower half casing from
bed· plate.
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 22: Right hand
pump on page 49 , 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. Reassemble pump as outlined in 7.5 Reassembly of pump on page 46 .
6. Be sure that pump bearings are greased. See Section 7.1 Lubrication - bearings on page 37 .
7. Check alignment as outlined in Alignment - initial.
8. Connect coupling as shown in 2.9 Connection of coupling on page 18 .
9. Follow directions in 4 Starting pump on page 27 , for initial operating conditions and for starting
pump.
7.7 Overhaul of pump
The pump should be opened and the interior inspected for wear and excessive clearances approximately
once each year. The period, however, may vary, depending on operating conditions and severity of serv-
ice. See
7.4 Dismantling of pump on page 45 for disassembly and Section 7.5 Reassembly of pump on
page 46 , for reassembly of pump.
The following items should be checked:
1. Wearing Ring Clearance:
The original diametric clearance between the wearing rings and the impeller is .010" to .014".
The following is suggested as guide for allowable wear of wearing rings before replacement for 6"
pump and smaller:
• Pumps of 50 feet or less T.D.H. (total dynamic head) - .030" to .035" total diametric clear-
ance.
• Pumps of between 51 and 100 feet T.D.H. - .025" to .030" total diametric clearance.
• Pumps of more than 100 feet T.D.H. - .020" to .025" total diametric clearance.
For 8" pumps or larger, the following is suggested:
• Pumps of 50 feet or less T.D.H. - .045" to V
• Pumps of between 51 and 100 feet T.D.H. - .035" to .040" total diametric clearance.
• Pumps of more than 100 feet T.D.H. - .025" to .030" total diametric clearance.
2. Fit of Impeller on Shaft:
These parts are machined for a push fit. (The shaft is made .000" to .0015" smaller than the im-
peller hub bore) and the impeller should tap easily on the shaft. If the impeller does not tap on
readily, the bore and shaft should be inspected to see that they are free from foreign matter or
burrs. The fit of the key in the keyways should also be checked to see that it is not causing bind-
ing. The key should have a sliding fit on the sides and should have .004" to .016" clearance at
the top.
3. Clearance Between Shaft Sleeve ( 104 or 126) and Stuffing Box Bushing (125):
7.6 Changing rotation of pump in field
54 3405-3406-3416 Installation, Operation and Maintenance Instructions