If your treadmill feels bumpy or slips under your feet, you might need to replace the belt. Learning how to change the belt on a proform treadmill is a task you can do yourself with some basic tools and patience. This guide will walk you through the entire process safely and clearly.
Replacing the belt can restore your machine’s smooth performance and prevent further damage. We’ll cover everything from the signs you need a new belt to the final adjustments.
How to Change the Belt on a Proform Treadmill
This main procedure involves removing the old belt, preparing the deck, and installing the new one. Before you start, make sure you have the correct replacement belt for your specific Proform model. You can find this information in your manual or on the Proform website.
Always unplug the treadmill from the electrical outlet before beginning any maintenance. This is the most important safety step.
Tools and Supplies You’ll Need
Gather these items first to make the job go smoothly. You won’t need every single tool for every model, but this is a good general list.
- New Proform treadmill belt (correct model number)
- Hex keys (Allen wrenches) – often 4mm, 5mm, or 6mm
- Adjustable wrench or socket set
- Phillips screwdriver
- Flat-head screwdriver
- A friend to help lift and align the belt
- Mild cleaner and a rag
- Silicon-based lubricant (for after installation)
Signs Your Treadmill Belt Needs Replacement
How do you know if you really need a new belt? Look for these common symptoms. Sometimes a simple adjustment or lubrication can fix the problem, but not always.
- Visible wear: Cracks, fraying edges, or shiny glazed spots on the belt surface.
- Slipping: The belt hesitates or slips under your feet during use, especially at higher speeds.
- Uneven movement: The belt drifts to one side constantly, even after you try to re-center it.
- Bumpy ride: You feel a consistent thumping or uneven surface as you walk or run.
- Burning smell: A friction smell can indicate a belt that’s too tight or worn out.
Step-by-Step Replacement Instructions
Follow these steps in order. Take your time, and don’t force any parts. If something seems stuck, double-check for hidden screws.
Step 1: Access the Treadmill Belt
First, you need to get to the belt. For most Proform treadmills, this involves removing the motor hood or console hood. Usually, you’ll find screws at the back or along the sides. Carefully lift the hood off and set it aside. You may need to disconnect a wire connector, so be gentle.
Then, loosen the rear roller adjustment bolts on both sides. These are located at the very back of the treadmill frame. Turn them counter-clockwise to loosen, which will slacken the belt tension.
Step 2: Remove the Old Treadmill Belt
Once the belt is loose, you can slide it off the rollers. Have your friend help you lift one side of the belt up and over the rear roller. Carefully work the belt off the front roller as well. This might require some maneuvering.
Pull the old belt completely off the deck and out of the treadmill frame. Be mindful of the electronic components near the motor. This is a good time to inspect the deck for wear. If it’s deeply grooved, you might need to replace it to for optimal performance.
Step 3: Prepare the Deck and Rollers
With the old belt removed, clean the entire running deck thoroughly with a mild cleaner. Wipe away all dust, debris, and old lubricant. A clean surface is essential for the new belt.
Also, take a moment to wipe down the front and rear rollers. Check that they spin freely and aren’t damaged. This preparation helps ensure a long life for your new belt.
Step 4: Install the New Proform Belt
Lay the new belt over the deck, making sure it’s not twisted. The textured or logo side usually faces up. Again, your friend’s help is invaluable here. Together, stretch the belt over the front roller first, then work it onto the rear roller.
The belt should sit evenly on both rollers. It will feel very tight, that’s normal. You’ll adjust the tension in the next step. Make sure the belt is centered so that equal amount of roller is visible on left and right sides.
Step 5: Re-Tension and Center the Belt
This is the most critical adjustment phase. Begin by tightening the rear roller adjustment bolts evenly, a quarter-turn on the left, then a quarter-turn on the right. Keep alternating to keep the belt centered.
Plug in the treadmill and turn it on to a very slow speed (1-2 MPH). Observe the belt movement. If it drifts left, slightly tighten the left adjustment bolt. If it drifts right, tighten the right one. Only make small, 1/8-turn adjustments.
The proper tension is achieved when you can lift the edge of the belt about 2-3 inches off the deck at the midpoint. Too loose and it will slip; too tight and it will strain the motor.
Step 6: Final Lubrication and Reassembly
Once the belt is centered and tensioned, you must lubricate it. Apply the silicon-based lubricant underneath the belt, onto the deck surface. Follow the pattern in your manual, usually a few lines along the length. Run the treadmill at 3 MPH for a minute to spread the lubricant evenly.
Finally, reattach the motor hood by reconnecting any wires and securing the screws. Do a final test run at various speeds to ensure everything runs smoothly and quietly.
Important Safety Tips and Common Mistakes
Avoid these pitfalls to ensure a successful repair. Rushing through the steps is the most common cause of problems.
- Never lubricate the old belt or the top side: Lubricant only goes under the belt, on the deck.
- Don’t overtighten: Excessive tension is a leading cause of motor failure and premature wear.
- Always unplug the machine: Working on a plugged-in treadmill is extremely dangerous.
- Use the right belt: A generic belt might not fit correctly or last as long as an OEM Proform part.
- Check the deck: Installing a new belt on a badly worn deck will ruin the belt quickly.
FAQ: Proform Treadmill Belt Questions
How often should I change my Proform treadmill belt?
With regular use (3-4 times a week), a belt typically lasts 3-5 years. But always replace it when you see signs of wear, regardless of time.
Can I just adjust the belt instead of replacing it?
Yes, if the only issue is drifting, adjustment is the first step. But for slipping, cracking, or glazing, replacement is usually necessary.
Where can I buy a replacement belt for my Proform?
The best place is directly from Proform or an authorized parts dealer. You’ll need your treadmill’s model number, which is often on the frame near the power cord.
Why does my new treadmill belt still slip?
The belt might be too loose. Increase tension slightly. Also, ensure you applied lubricant correctly and that the deck is clean. A worn drive belt on the motor could also be the culprit.
Is it hard to change a Proform treadbelt yourself?
It’s a moderate DIY project. If you’re comfortable with basic tools and can follow steps carefully, you can save on a service call. Having a helper makes it much easier though.