← All terms
Pump Motor
AC induction motor that drives a rotary pump head — runs continuously while the pump is engaged.
Category: Pumps & Pressure
The electric motor that drives a rotary pump. Typically a single-phase AC motor running at 1450 RPM (50 Hz) or 1750 RPM (60 Hz). On vibration pumps, the "motor" is integrated into the pump body as an electromagnetic coil.
Why it matters — The motor is the workhorse of the pump system. Motor failure is rare on quality pumps but does happen — usually after 10+ years of regular service or after running dry (which destroys the bearings).
Good to know
- Motor noise that changes over time (louder, rougher) usually signals bearing wear. Replace before complete failure to avoid collateral damage.
- Vibration pumps are typically replaced as a complete unit; rotary motors can be serviced or replaced separately from the pump head.