Hello i have a proform j6 treadmill when first starting i will be walking on the treadmill when all of a sudden the belt will stop working i have power to the controls up top i opened the front compartment and the board has power but no movement this doesnt happen all the time just some times also if when this happens i pull the red key wait about a min and replace the key sometimes this works or sometimes i have to start walking while replacing the key and then it will work. please help!!!!!!

SOURCE: My Proform 650v treadmill stop when running after couple of miles

Most likely a bad drive belt. Take the cover off the motor area. If you see black dust near the left side of the motor, replace the drive belt.

SOURCE: I have a Proform 770 EKG Treadmill jerks and squeaks

The drive belt was loose. I tightened up the motor just a smidge using a crow bar. That solved the problem.

SOURCE: have a proform pro from730cs treadmill every

The walkbelt is either worn out or has a lack of lubrication between the walkbelt and deck. Either condition causes too much friction between the belt and deck causing the motor to overheat. Do not use silicone or unapproved lubricants as they will deteriorate the walkbelt.

SOURCE: Nordictrack EXP 1000 Treadmill Quits after 10 Minutes

Hello There, Thank you for all the information. It appears as if your walk belt is worn. What is happening is the friction from the bottom of the belt is actually causing the motor to overheat (there is a thermal cutout inside where the 2 blue wires go) When the belt wears the cloth on the underside becomes flattened out causing too much surface area to contact the walk board, thus the extra friction.
To check your walk board you can loosen the adjusting bolts on the rear and while lifting the walk board look underneath. If there is any wear/white areas then you will need to replace the board as well. You will be able to tell by just rubbing your hand across it and check for any places where the black film may be coming off.
Also the only time you really need to replace any of the rollers is when the bearings go bad or the pulley on the front roller separates. The rollers are about a 1% chance of causing this problem.
Good Luck! and great question, Tim

John Mazmanian

• 832 Answers
• Posted on May 16, 2010

SOURCE: my treadmill Proform caliber walk... belts keeps

The deck needs to be lubricated. The lubricant can be purchase @ gympart.com. LUBRICATION PROCEDURE: 1. Turn off and unplug treadmill. 2. Cut off the end of the tube of lubricant. 3. Holding the tube in one hand, insert the tube underneath the treadbelt halfway between front and back and halfway between right and left. 4. Squeeze the full contents of the tube onto the deck in a circular pattern in the center 1/3 of the deck. 5. Plug in and turn on treadmill, then walk normally on treadmill at 0.5 mph for five minutes