ITT 3610 i-FRAME Manual page 95

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tectable magnetism. Magnetism attracts ferritic objects to the impeller, seal, and bearings
which can result in excessive heat generation, sparks, and premature failure.
1. Assemble the impeller onto the shaft. The impeller is a slip fit onto the shaft (0.0127 mm to 0.0508
mm | 0.0005 in. to 0.002 in. clearance). Position the impeller to the X value recorded during disas-
sembly, or refer to the Impeller setting table in the Disassembly section. Apply a liberal amount of
an anti-seize compound onto the shaft.
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Figure 68: Rotor assembly
2. Assemble the impeller locknuts.
One locknut has a right-hand thread, the other one has a left-hand thread.
If this is a repair, it is likely that only one locknut was removed. Keep the second locknut on the
shaft in order to maintain the impeller centering. Use the previously recorded dimension from the
bearing shoulder to the face of the impeller hub, or refer to the Impeller setting table in the Disas-
sembly section.
NOTICE:
Make sure the threads are clean. Deburr if necessary. Apply an anti-seize compound to the
threads.
3. Install the impeller wear ring (142).
See Replace the wear rings in the Preassembly inspections section.
4. Install the casing wear rings (164) over each impeller ring (142).
Be certain the smaller outer diameter is nearest the impeller when installing.
5. Install the throat bushing (125) on each side of the impeller.
Be certain the smaller outer diameter is nearest the impeller when installing.
NOTICE:
The impeller and wear-ring clearance setting procedures must be followed. Improperly set-
ting the clearance or not following any of the proper procedures can result in sparks, unexpect-
ed heat generation, and equipment damage.
6. Measure the TIR on the impeller wear rings, impeller locknuts, and bearing fits.
The shaft is the datum point. Measure the runout of wear rings and impeller nuts to the shaft with a
dial indicator.
API limits are listed in the Shaft and rotor runout requirements table.
3610 i-FRAME API 610 11th Ed/ISO 13709 2nd Ed, API Type BB1 Single-Stage, Axially-Split, Between-Bearing IOM
Check for magnetism on the pump shaft and demagnetize the shaft if there is any de-
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124
130
6.6 Reassembly
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