6.7 Reassembly
6.7.1 Assemble the pump with packing
1.
Place the impeller key (178) in the shaft (122).
2.
Check the impeller (101) and casing (100) to determine the correct impeller rotation, and then place
the impeller on the shaft as specified in
6.7.2.1 Dimension A on page 50
For the correct impeller rotation, refer to
6.5.2 Change the rotation on page 44
.
3.
If the impeller has replaceable rings, then heat each new ring (142) to approximately 300–400°F
(149–204°C), and then slide them onto the impeller. Hold the rings against the impeller shoulder un-
til they cool.
CAUTION:
Wear insulated gloves when you handle rings. Rings will be hot and can cause physical injury.
4.
Place both shaft sleeve keys (401) on the shaft (122).
5.
Slide the sleeve gaskets (428) onto the shaft and against the hubs of the impeller.
6.
Slide the sleeves (126) onto the shaft.
7.
Place the sleeve O-ring (497) onto the shaft, into the sleeve counterbore.
8.
Verify that dimension A is maintained, and then use a pin spanner wrench and a hammer to secure-
ly tighten the shaft sleeve nuts (124).
9.
Drill a shallow recess in the shaft through the setscrew hole in each of the shaft sleeve nuts, and
then lock each shaft sleeve nut in position with cone point setscrews (222B).
A low-strength sealant such as Loctite 271 can be used to retain the setscrews.
Figure 32: Shallow recess drilled through setscrew hole
10. Assemble the casing rings (127).
Refer to
6.6.2.1 Adjust the wear rings on page 47
6.7.2 Assemble the pump with mechanical seals
1.
Place the impeller key (178) in the shaft (122).
2.
Check the impeller (101) and casing (100) to determine the correct impeller rotation, and then place
the impeller on the shaft as specified in
6.7.2.1 Dimension A on page 50
For the correct impeller rotation, refer to
6.5.2 Change the rotation on page 44
.
3.
If the impeller has replaceable rings, then heat each new ring (142) to approximately 300–400°F
(149–204°C), and then slide them onto the impeller. Hold the rings against the impeller shoulder un-
til they cool.
6.7 Reassembly
48
Model 3409 Installation, Operation, and Maintenance Manual
Содержание Goulds Pumps 3409
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