Running platform slipping on my T9 treadmill - Nordic Track NordicTrack - T9 Si Folding Treadmill

You have to lift up the back of the treadmill a little to access 2 phillips head screws that keep the motor cover on, (note that you will also have to unscrew a few phillips head screws on the bottom front of the cover as well in order to remove it completely). Before you begin lifting the back of the treadmill platform off the ground to access the screws underneath make sure the treadmill is on a zero incline setting and it helps to find a sturdy object you can rest the tail end off the treadmill on about 1 to 2 feet above the ground giving you enough room to access the screws underneath. Another option is to lift the treadmill platform all the way up and lock it in an upright position using the locking mechanism and lock handle that is located underneath the machine. I find this route to be unnecessary and cumbersome for what you want to do. Once you lift the treadmill up you will see the 2 small Phillips head screws near the front of the treadmill running platform that you need to unscrew in order to take off the motor cover. You also need to unscrew a couple small screws under the machine located on each side of the wood running board. These screw fasten the top inner plastic side covers onto the top of the running platform which needs to be taken off in order to access the back rollers. Make sure you collect the screws in a way that you will remember where they go later when you reassemble as this is your first time taking them out and you might forget later. Now with the bottom screws out, lower the back of the treadmill down level on the ground and pull off the motor cover, and the Left and Right INNER plastic running platform covers. With the inner covers removed you will find yet another small set of screws fasting the main plastic side covers to the running board which require an allen wrench to unscrew. Use the small wrench that came with the machine if you have it handy. With those off you can pull the main Left and Right plastic running board covers off, just make sure to carefully unsnap them from their snap points near the bottom rear of the machine. With all the covers removed you can now access the bolts that hold your treadmill rollers in place and the drive belt which you will have to slip on and off the motors drive pulley and the front roller using a pull and turn technique. The back rollers are simple and can be removed by unscrewing the tension bolts at the back of the treadmill and pulling the roller through and out of the belt. With drive belt set aside and all roller bolts removed you can take out the front roller in the same way you removed the back roller. Replace the treadmill belt and reassemble the machines components in the reverse fashion you disassembled them using these instructions. Doing this yourself will save you hundreds of dollars service man visits in the future.

1) Adjust the reed switch , clean it, and tigh the wires connector
see the diagram
2) RUN the software calibration after you fix it, for diagnose, troubleshooting , fix it.
3) test the fuse for blown and replace, use the VOM, or c.breaker reset.
4)test the input voltage motor, with a VOM , if there are voltage, the motor need attention. tight any wires connector to the motor very well see the diagram
5) measure the output voltage board, for input voltage motor, if there are NOT voltage , the board is faulty. tight any wires connector for loose, or bad contacts. see the diagrama
IF doesnot resolve the problem call to the suppliers for warranty of the board of another parts, or service.
God bless you

How To Fix Slipping Treadmill Belt
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Check page 27 in the owner's manual:

"If the walking belt slips when walked on, first remove

the key and UNPLUG THE POWER CORD. Using

the allen wrench, 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 side of the walking

belt 3 to 4 inches off the walking platform. Be

careful to keep the walking belt centered. 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."

If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn both rear roller adjustment bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift the edges of the walking belt (2 to 3 in.) off the walking platform. Be careful to keep the walking belt centred. Plug in the power cord, insert the key and run the treadmill for a few minutes. Repeat until the walking belt is properly tightened.

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 inches above 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.

If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the hex key, turn both idler 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.

f the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD.Using the hex key, turn both idler 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.

If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn both rear roller adjustment bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift the edges of the walking belt 3 to 4 inches off the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert the key and run the treadmill for a few minutes. Repeat until the walking belt is properly tightened.

You can get the manual on linke below. When there type in the number code then hit submit. on the next screen click on manual link to down load. then on page 21 tells you how to adjust belt.

http://www.hammerwall.com/Download_Manual/18209/