Treadmill belt doesn't run smoothly

Check if the running belt is lubricated. You can't run an engine without oil. So, spray a good quality silicone lubricant on the base of the running belt. It is best if you spray on a lint free cloth just enough to make a wet patch. Do it outside so that no spray residue lands on the floor and becomes slippery or lands on the carpet and stains it, then return inside and lift the treadmill running belt and soak or smear the base with the wet patch of the cloth and run for a full minute. Then lift the belt again and give it another swipe on the entire base, then feel the base with your fingers or hand to see if it feels wet and smooth. Run the treadmill for another minute at slow speed, otherwise the liquid can fly and splatter on wall or floor. If it still hasn't solved the problem, then it must be the motor brushes, or it may be set to run slow and fast according to the running settings on the console. Mine does the same thing if it is programmed to do 1 minute slow and one minute a bit faster. Good luck.

see the video and proceed according. God bless youlube the rack and pinion of elevation motor, and adjust the small POT attached. see the diagram attached.

Dear Sir:
I can read you trouble, and follow the next steps:
ALIGNING AND ADJUSTING THE RUNNING BELT
The correct alignment of the running belt is critical to the smooth operation of the treadmill. The belt is properly aligned at the factory. However, during shipping and handling or by use on an uneven surface, the belt may move off center and require a few simple adjustments. Before aligning the running belt, check its operation by following the procedure in Checking the Alignment of the Running Belt. If you determine that the belt needs alignment, follow the instructions here. CAUTION: Special care must be taken when aligning the running belt. Turn OFF the treadmill while adjusting or working near the rear roller. Remove any loose clothing and tie back your hair. Be very careful to keep your finger or any other object clear of the belt and rollers, especially in front of the roller and behind the deck. The treadmill will not stop immediately if an object becomes caught in the belt or rollers. Realigning the belt takes a few simple adjustments. If you are unsure about this procedure, call Precor Customer Support (see Obtaining Service.) Take the following steps to align the running belt on the treadmill. To ensure your safety, make all adjustments while the treadmill is OFF. 1. Make sure the treadmill is OFF and the running belt has completely stopped. 2. Locate the right belt adjustment bolt in the rear end cap of the treadmill. (To determine left and right, stand at the rear of the treadmill and face the display.) See Diagram 24. The direction you turn the bolt depends on how the belt is tracking. Make all belt adjustments on the right rear corner bolt using the hex key provided. • If the belt is off center to the RIGHT, turn the adjusting bolt ¼ turn clockwise, which moves the running belt to the left. • If the belt tracks off center to the LEFT, turn the bolt ¼ turn counterclockwise; this moves the belt to the right. Important: Do not turn the adjusting bolt more than ¼ turn at a time. Overtightening the bolt can damage the treadmill. 3. Turn the unit ON. 4. Stand beside the treadmill and press QUICKSTART. 5. If you are prompted for a password, press INCLINE ??¼, SPEED ??¼, SPEED ??². The running belt starts automatically after the 3-second countdown appears on the display. 6. Press the SPEED ??² key until the display shows a speed of 3 mph (5 kph). 7. Walk around to the rear of the unit and observe the running belt for a few minutes. The belt should run centered along the running bed. If the belt drifts off center, you will need to make adjustments. CAUTION: If you hear any chafing or the running belt appears to be getting damaged, stop the running belt immediately by pressing the red STOP button. Contact Precor Customer Support. 8. If the belt needs additional alignment, repeat steps 1 through 7 until the belt is properly aligned. 9. After aligning the belt, press the STOP button and RESET. Turn OFF the treadmill. Tighten any loose fasteners or other components on the equipment. If you hear unusual noises or you feel that the treadmill is in need of repair or service, contact Precor Customer Support. Refer to Obtaining Service.
Finally, check if the power cord is loose, connect it again. a) See if the breaker of Home is tripped? b) See if the breaker of the Treadmill is tripped. If do the Belt is very Tighted! loose a little. Try again.
Thank you in advance, if you need assistance, you can contact me, Blessing. sincerely.
E. CUADRA Managua, Nicaragua. C.A.

3 different possibilities in my opinion:

belt is too loose, belt is too tight, belt is worn out.

Try to lift the belt and get your hand under it in the middle of the deck. If you cannot reach, it is possible that your belt is too tight. Another clue for this would be the belt "curling" on both sides at the edges. Try to loosen the belt, gradually and testing it along the way.

If on the contrary you can easily slide your hand under the belt from one side to the other, it is more likely that the belt is too loose. The squeaking might be due to the belt not being "square" on the deck. Try to loosen it even more until you can slide it with your hands across the deck. And have it aligned evenly at the front and back. Then retighten and adjust the tracking at low speed.
!!! Do not over loosen as the bolts might come out of the back roller.

A worn out belt might squeak and skip when its old.

This typically means the belt is worn - or not tensioned properly.

Look in your owner's manual - and it will tell you how to properly tension the belt with the included spanner wrench.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

Inspect belt and deck. The deck should be smooth without any grooves, pits, or exposed wood. The belt should have a consistent ridged feel from one side of the belt to the other (a belt can be worn out without any sensory signs of a problem). If you feel deep grooves in the deck or uneven wear on the underside of the belt, part replacement is necessary. Visually look at the underside of the belt. It should have a consistent look. Black streaks in the belt are a sign of bottom-layer wear through. Very worn belts will feel smooth in the areas you normally walk- you would think smooth is good but not in belts because the smoother the belt, the more contact area. Continued use of your treadmill may damage expensive electrical components. 85% of all Treadmill problems are cause by worn belt and deck I would revisit the scene of the crime again.

This machine has what they call a thermal switch. It is designed to shut the machine off if it gets too hot. This heat is caused by friction. Friction is caused 99% of the time by the walking belt or the drive belt. If it is the drive belt then it can be solved by either applying a treadmill lubricant (must be made for treadmill belts) or by purchasing a new belt. If you feel the underneath side of the belt and you feel a screen door type feeling you just need lubricant. If you feel a smooth surface you will probably need a new belt. If you have lubricated in the past year and your belt has the screen door feel then take off the motor hood cover and check the drive belt. If it is worn then you will need to replace that. You can purchase either of these products from the manufacturer, at www.iconservice.com. a couple of other places that may have them for discounts are www.ebay.com, www.fitnessrepairparts.com, or www.treadmilldoctors.com.

Use a silicone spray on the underside of the belt, this will lubricate the belt and make it run smoothly

could be a couple of things, I have found that alot of the time it is the belt or deck wearing out and the added effort of uphill causes overcurrent and trips the circuit to protect it from damage. Run your hand between the belt and deck and feel how smooth it is.

This is caused by one of three problems. First and most likely, the walking belt is loose. To tighten the belt, start by locating the two bolts that adjust the rear roller (one on each side of the unit in the back). Run the unit at about 3 mph. Tighten the bolts a 1/4 turn at a time. Make sure that what you do to one side, you MUST do to the other side or the belt will get off center. After you tighten it 1/4 turn, check the belt to see if it is still slipping. If it is then tighten the belt 1/4 turn again. Continue until the belt does not slip, but do not tighten the bolts more than 2 full turns. If it takes more than 2 turns then something else is the problem. The second problem that it could be is the drive belt might be loose. To tighten the drive belt, start by removing the front cover. loosen the bolts around the motor then tighten the drive belt by tightening the motor adjuster bolt. Once the drive belt is tight, tighten the motor back down. The third problem that it could be is the walking belt could be worn and need to be replaced. Let me know if you have any questions.