My Proform 520 treadmill is jerking making it dangerous.

Michael requested 3 quotes from Appliance Repairmen in East Gosford

The treadmill is ok when i am just walking but as soon as i start to pump up the speed and run it starts jerking and i have to stop.

Treadmill dismantled to get in door then put together again
Treadmill is in garage needs dismantling to get inside then once inside put...

Repair treadmill
Treadmill,life fitness.every thing lights up as normal when you turn it...

Treadmill - needing a new running belt for
Treadmill - needing a new running belt for machine

Repair of treadmill
My Ignite T1.0 treadmill was working perfectly, but after I had vacuumed it,...