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There may be a thermal protector placed internally within the motor or motor-compressor to protect the motor and motor winding's components from dangerous overheating that can cause motor failure.
This overheating generally occurs when the motor is overloaded, a bearing seizes up, something locked the motor shaft from turning, or the motor simply fails to start properly. A failure to start may be caused by faulty start winding's in a motor.
The thermal protector consists of one or more heat-sensing elements integral with the motor or motor-compressor and an external control device. The thermal protection is in place to turn the motor off when excessive heat is generated within the motor circuitry and keep it from burning up the motor.
These thermal protectors are reset when the motor cools to a safe operating temperature. There is usually a visible red button located on the wiring side of the motor, opposite of the motor shaft, but not always. In some cases, these buttons are reset manually.
I am assuming this is electric powered and if so your motor is overheating and cutting out. There are many reasons why this can happen. Does the motor sound slow or underpowered from when it was new? If so you may have lost a field coil so only 50% of the motor is working, you will also notice a drop in pressure as well. If not then it could be the bearings in either motor or pump head (should make a whining sound though). A failed bearing will mean the motor working harder and overheating. It could also be the pressure valve sticking or the spring inside has broken and doesn't allow pressure to build so the motor runs faster and then overheats...
When a motor is doing this it is overheating. You should replace the motor as soon as you are able to. This could cause more trouble for you soon because the motor is over heating.
yup, the thermal switch on the motor is tripping because of an overheated motor. This is the problem if you can't turn it back on right away and have to wait 10 minutes or so.
What are you cutting? What type of blade, power supply, etc are you using. It sounds like the thermal overload is cutting out.
Try looking for a little (red) button on the motor itself that pops out slightly when the motor cuts off.(due to overheating). If you push that in, will the saw start running again?
You should check the disc filter that is located under the paper cone support. The support is secured with a single screw in the middle at the bottom. This filter is commonly overlooked and when it gets dirty will restrict airflow and cause the motor to overheat. Most motors have a Hi-Limit switch incorporated into the motor to protect against overheating. You should also check the top filter (which is probably foam) and replace if it is clogged.
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