Goulds Pumps LF 3196 i-FRAME - IOM User Manual
Page 84
Casing areas to inspect
The arrows point to the areas to inspect for wear on the casing:
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Figure 17: 3196, HT 3196, LF 3196, NM 3196, and 3198 casing
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts
When to replace
Impeller vanes
• When grooved deeper than 1/16 in. (1.6 mm),
or
• When worn evenly more than 1/32 in. (0.8 mm)
Pumpout vanes
When worn or bent more than 1/32 in. (0.8 mm)
Vane edges
When you see cracks, pitting, or corrosion damage
Frame adapter check and replacement
• Replace the frame adapter if it has cracks or excessive corrosion damage.
• Make sure the gasket surface is clean.
Dynamic-seal repeller replacement
This table shows the criteria for replacing dynamic-seal repeller parts for the 3196, CV 3196, and LF 3196
pump models.
Dynamic seal part
When to replace
Dynamic-seal repeller vane
The grooves are deeper than 1/16 in. (1.6 mm) or
are worn evenly more than 1/32 in. (0.8 mm).
Sleeve surface
The surface has grooves, pitting, or other damage.
Labyrinth seal replacement
Replace the labyrinth-seal O-ring if it has cuts and cracks.
Gaskets, O-rings, and seats replacement
• Replace all gaskets and O-rings at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects.
In order to repair worn seats, skin cut them in a lathe while you maintain dimensional relationships
with other surfaces.
• Replace parts if the seats are defective.
Maintenance
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Model LF 3196 i-FRAME Installation, Operation, and Maintenance Manual