Goulds Pumps CV 3196 i-FRAME - IOM - Manual (Page 87)

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
Impeller areas to inspect
101
Figure 18: Areas to inspect for wear on the CV 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.
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.
Shaft and sleeve replacement guidelines
Two types of sleeves
The 3198 is offered with either a metallic sleeve that uses the standard 3196 shaft or a Teflon sleeve. The
Teflon sleeve requires a special shaft and a different inboard labyrinth oil seal.
Maintenance
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual 85