Bell & Gossett P81567F Series 1531 - Manual (Page 23)

Remove the bearing frame and impeller assembly
1. Remove the support foot capscrews.
2. Loosen the volute capscrews but do not remove them.
3. Loosen the bearing frame and impeller assembly from the volute.
WARNING:
Make certain that the internal pressure of the pump is relieved before
you continue. Failure to follow these instructions could result in serious
personal injury or death, or property damage.
4. Remove the seal flushing tube if it is used.
5. Remove the volute capscrews.
6. Remove the bearing frame and impeller assembly from the volute.
7. Remove the impeller capscrew, lock washer, and washer.
8. Remove the impeller.
Remove the mechanical seal (1531 and 1531-F)
1. Remove the rotating portion of the seal.
If necessary, use a screwdriver to loosen the rubber ring.
2. Remove the seal insert, the insert gasket, and the retainer if it is used.
Remove the seal or packing rings (1531-S, 1531-D, and 1531-PF)
1. Remove the hex nuts from the seal cap bolts.
2. For the 1531-PF, remove the hex nuts from the packing gland.
3. Remove the coverplate screws.
4. Remove the coverplate from the bracket.
5. Remove the seal assembly or packing rings.
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.
Areas to inspect
Inspect the pump regularly for leaking seals, worn gaskets, and loose or damaged
components. Replace or repair these parts as required.
Shaft and sleeve inspection
Inspection criteria
Inspect the shaft and sleeve according to this criteria:
• Thoroughly clean the shaft and sleeve.
• Thoroughly clean the coverplate seal cavity.
• Inspect the surface for damage such as pitting, corrosion, nicks, and scratches.
Maintenance
Series 1531 Installation, Operation, and Maintenance Manual 21