Goulds Pumps VIT - IOM - Manual (Page 63)

1. Using an arbor press and a piece of pipe or sleeve with an outside diameter slightly smaller that the
diameter of the bowl or lineshaft bearing housing bore, press the bearing off.
2. Remove the suction bell bearing by setting the suction bell in a lathe and machining the bearing off.
The suction bell bearing can also be removed using bearing pullers to pull the bearings out.
Pre-assembly inspections
Guidelines
Before you assemble the pump parts, make sure you follow these guidelines:
• Inspect the pump parts according to the information in these pre-assembly topics before you
reassemble your pump. Replace any part that does not meet the required criteria.
• Ensure that the parts are clean. Clean the pump parts in solvent to remove oil, grease, and dirt.
NOTICE: Protect machined surfaces while you clean the parts. Failure to do so may result in
equipment damage.
Replacement guidelines
Casing check and replacement
Inspect the casing for cracks and excessive wear or pitting. Thoroughly clean gasket surfaces and alignment
fits to remove rust and debris.
Impeller replacement
This table shows the criteria for replacing the impeller parts.
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)
Vane edges When you see cracks, pitting, or corrosion damage
Keyway and bores When you see damage
Gaskets, O-rings, shims, and seats replacement
• Replace all gaskets, O-rings, and shims at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects. To repair worn seats, skin cut
them in a lathe while maintaining dimensional relationships with other surfaces.
• Replace parts if seats are defective.
Bearing retainer check
Check the bearing retainer for deformation and wear.
Shaft checks
• Check the shafts for straightness and excessive wear on the bearing surfaces.
• Check the deflection of shafts. The average total runout should not exceed 0.010 in. (0.25 mm) TIR
for every 10 ft. (3 m) of shaft length.
Mechanical seal checks
On pumps equipped with a mechanical seal, check that the shaft or sleeve is free of pits, burrs, or sharp
edges to prevent cutting or improper sealing of the seal O-rings. Remove any burrs and sharp edges by
polishing with a fine emery cloth.
Impeller and bowl checks
Visually check impellers and bowls for cracks and pitting. Check all bowl bearings for excessive wear and
corrosion.
Maintenance (Continued)
Model VIT Installation, Operation, and Maintenance 61