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