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10.Remove the two gland bolts, gland halves and packing from each stuffing box.
11.Remove two casing rings (3–003–9) from the impeller (4–002–0) and remove o-ring (3–
914–2) and locating pin (3–943–9) from each casing ring.
12.Loosen set screw (3–902–3) in shaft nut (3–015–9) and remove the nut. On pumps built
after 1991, remove o-rings from counterbore in shaft sleeves.
13.Remove shaft sleeve (3–009–9) and impeller (4–002–0).
NOTE: Apply heat uniformly to the shaft sleeve to loosen the sealant between the shaft
and sleeve. DO NOT HEAT ABOVE 300°F. To further assist in removing the sleeve,
hold the shaft vertically and drop it on a block of wood. The impeller weight should
force both the impeller and sleeve from the shaft.
14.Follow steps 12 and 13 for other shaft sleeve and nut removal.
NOTE: For impellers with replaceable rings — remove the rings (4–004–9) by cutting
the rings with a cold chisel.
15.Remove impeller key (3–911–1).
6.7 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.
• Make sure that the parts are clean. Clean the pump parts in solvent in order to remove
oil, grease, and dirt.
NOTICE:
Protect machined surfaces while you clean the parts. Failure to do so may result in
equipment damage.
6.7.1 Replacement guidelines
Impeller replacement
This table shows the criteria for replacing the impeller:
Impeller parts
Impeller vanes
Vane edges
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.
• Replace parts if the seats are defective.
G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION 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 you see cracks, pitting, or corrosion damage
6 Maintenance
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