Pro-Form 445 runs fine when no one is walking on it. when you start walking it will slow down from like 3.0 to 1.7 stat.

SOURCE: Treadmil stops or slows down upon walking.

Check both belts to be sure they are adjusted and not slipping.Check the underside of the walk belt to see if it feels frayed in the center as compared to the edges, the center always wears more than the edges a really worn belt must be replaced. if it is nor worn there is a wax lubricant for proform treadmills that can be purchased at retail stores that sell treadmills.Sears, dicks sporting goods and also treadmilldoctor.com are good places to buy it.

SOURCE: Pro-form 320x treadmill slows down then motor stops.

Sounds like it is overheating, you have to disassemble the unit and find why it might be overheating

SOURCE: pro form service manual?

Please type in your model number on this page to get the free downloadable manual:

http://www.iconservice.com/proform/manuals.html

Hope this is helpful

John Mazmanian

• 832 Answers
• Posted on Jul 20, 2010

SOURCE: when walking on my pro form xp weight loss 620,

If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the hex key, turn both rear roller bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift each edge of the walking belt 2 to 3 in. (5 to 7 cm) off the walking platform. Be careful to keep the walking belt centered. Then, plug in the power cord, insert the key, and carefully walk on the treadmill for a few minutes. Repeat until the walking belt is properly tightened.

SOURCE: I am having trouble with

Don't know what size allen wrench you need but here are some resources for you:

Tutorial On Adjusting Treadbelt

Search for fitness servicers in your area

List of different versions of the Proform 530x, where you may be able to find an owner's manual, lube, a new treadbelt, or any other parts you may need.