Most motors on swamp coolers have an automatic reset thermal overload.
Swamp cooler belt tension.
When pressed it should move about one half inch.
So while your cooler will run you ll have to.
Check the motor s fan belt tension.
Roughly speaking there should be about one inch of play in the tension of your fan belt.
There are a number of factors that can interfere with the transfer of air from the outside into the swamp cooler.
Lightly oil the bearing on the blower assembly and the motor if it has an oil receptacle.
A common problem is the fan belt that runs from the fan motor to the fan blade axle.
Step 3 check shaft bearings.
The tightening of the belt is a straightforward and simple operation.
Will too much belt tension on a swamp cooler cause the motor to burn out.
It should not be too tight or too loose.
Incorrect fan belt tension could cause your swamp cooler motor to overheat.