ITT HT 3196 i-FRAME Installation, Operation And Maintenance Manual page 86

Maintenance
Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
Figure 18: 3196, HT 3196, LF 3196, NM 3196, and 3198 casing
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts
Impeller vanes
Pumpout vanes
Vane edges
Impeller areas to inspect
Figure 19: Areas to inspect for wear on the 3196 impeller.
Frame adapter check and replacement
• Replace the frame adapter if it has cracks or excessive corrosion damage.
• Make sure the gasket surface is clean.
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Model HT 3196 i-FRAME Installation, Operation, and Maintenance Manual
When to replace
• When grooved deeper than 1/16 in. (1.6 mm),
or
• When worn evenly more than 1/32 in. (0.8 mm)
When worn or bent more than 1/32 in. (0.8 mm)
When you see cracks, pitting, or corrosion damage