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3.
Loosen the clamp bolts (370C) and the jack bolts (370D).
4.
Measure the gap between the impeller (101) and the seal chamber and stuffing-box cover (184) with a
feeler gauge.
5.
When you reach a 0.030 in. (0.76 mm) clearance, tighten the clamp bolts (370C), jack bolts (370D),
and lock nuts (423).
This approximates the impeller position when it is set to 0.015 in. (0.38 mm) from the casing. Perform
a final impeller adjustment after you install the impeller into the casing.
6.
Check the impeller (101) runout.
Check vane tip to vane tip. If the total indicator reading is greater than 0.005 in. (0.13 mm), determine
the cause and correct the issue before you proceed.
Model HT 3196 i-FRAME Installation, Operation, and Maintenance Manual
370C
423
370D
101
Maintenance
115
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