20-30 yr life span for the 0523 is based on 5-8hrs per day Apr- early Nov operation in NW Ohio and pump has good air filtration and is not maxed out at 9-10psi. Motor bearings on GAST 0523s will usually last for 3 vane rebuild events providing the pump is kept dry, not over heated, and well ventilated. Neglect and abuse shortens life span of 0523. I have numerous units operating at 26 to 28 yrs so far since 1986-87.
A good operation and maintenance program, no doubt!
The most common cause of motor failure is the insulation on the windings breaks down. Overheating a motor rapidly advances this.
