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 33: 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
11. Install the stationary seats (383) into the glands (250) with the lapped surface facing outward.
NOTICE:
Do not scratch or damage the seal faces during assembly. The stationary seat must bottom
squarely in the gland.
12. Apply a fine coat of silicon grease or equivalent to the shaft sleeve, and then slide the seal head
assembly (383) over the sleeve. If the seal is a John Crane Type 8, then set the seal to the approxi-
mate dimension shown in
6.7.2.1 Dimension A on page 50
NOTICE:
Avoid elastomer damage. Do not use petroleum-based products to install the mechanical seal
head.
6.7 Reassembly
Model 3409 Installation, Operation, and Maintenance Manual
49
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