The belt stop from time to time when i run - Treadmill Doctor Exercise & Fitness

If belt is that badly warn, timing could have jumped and stopped the engine. Apparently this is a no interference engine and no noise when it stopped running means no valve or piston damage was done when it stopped. Replace the timing belt, being real sure the belt and cam timing are correct when put together.

This is known as 'dieseling'. The most common causes are

-idle speed set too high

-engine operating too hot (faulty thermostat, faulty temp sender, leaky head gasket)

engine timing is out (loose distributor clamp, worn timing belt, faulty timing belt tensioner)

-

replace timing belt if hours of use unknown are stretched cracked
before removal take photos of line up points for crank and cam cogs

these belts when stopped
do look as if they run off the cam a bit
but under work load stay straight

The ruff noise you have on the timing belt shows the belt quality,which is better to change the belt with a recommended by the manufacturer,for better results and more protection and safety.

running good --not a timing belt problem
possible a balance timing belt problem as that shaft has to timed correctly or it accentuates the engine pulse vibrations
run the fault codes and check for injector dirty problems

At the end of of the running belts in the end caps will adjusting bolts you will need a allen wrench to adjust the tension. Start your treadmill and turn clockwise a 1/4 turn each time see i f you can stop the belt. You need to be aware that the drive belt can also cause this problem so I suggest that you remove the motor shroud and when you are adjusting whether the front roller is moving and the running belt has stopped or the roller has stopped and motor is rotating ( adjust Drive Belt)

At the end of of the running belts in the end caps will adjusting bolts you will need a allen wrench to adjust the tension. Start your treadmill and turn clockwise a 1/4 turn each time see i f you can stop the belt. You need to be aware that the drive belt can also cause this problem so I suggest that you remove the motor shroud and when you are adjusting whether the front roller is moving and the running belt has stopped or the roller has stopped and motor is rotating ( adjust Drive Belt)

At the end of of the running belts in the end caps will adjusting bolts you will need a allen wrench to adjust the tension. Start your treadmill and turn clockwise a 1/4 turn each time see i f you can stop the belt. You need to be aware that the drive belt can also cause this problem so I suggest that you remove the motor shroud and when you are adjusting whether the front roller is moving and the running belt has stopped or the roller has stopped and motor is rotating ( adjust Drive Belt)

Yes the belt is a rubber belt which needs replaced approx every 60k The belt breaks, the engine stops.. hopefully no valve damage occured!

Hello, this to me sounds like your fan belt slipping (not timing belt). To adjust the fan belt you need to undo your bolt on the alternator, pull it tight onto the fan belt and while holding it tight do the bolt back up tightly. this will stop yoour fan belt from slipping. I hope this helps.