Its a good idea to keep an eye out on a weekly basis for any wetness under the motor, or around the pump. The picture to the left shows a lot of calcium buildup on the under side of the motor, from a leaky shaft seal that had gone unattended for quite some time. Shaft seals can cause unintended damage to a pump, by corroding bolts that become frozen in the threads of the seal plate. What would normally be a $15.00 fix by replacing a shaft seal, can cost well over $100 if the seal plate must be replaced. The calcium build up on the motor casing will also void the manufactures warranty.
In more extreme cases, even after using 1/2 a can of WD40, or Liquid Wrench, I still could not get the seized bolt out of the pump pictured to the right. The threaded brass insert, which is moulded into the pump itself and is how the motor/seal plate attaches to the pump, popped out attempting to free the corroded bolt. This cannot be repaired.
In the case of this old Hayward Super II pump, the brass inserts are in the pump itself, not a seal plate that can be replaced like the Pentair Whisper flow pumps. With Title 44 being the law of the land here in Arizona, this neglected shaft seal will end up costing the individual about $1000, or more, with the installation of a new, two speed pump and digital time clock, capable of running the two speeds, or a variable speed pump.