Moving belt moves at the top, not the bottom

Probably the belt is not tight enough. there are adjustments to set it up. ours is on the open end of machine where you step on. and takes an Allen wrench to adjust it.

There are two holes on each side of the back covers of the treadmill. They have the adjustment bolts in them for the rear roller and It will require an Allen wrench to adjust it. If you tighten one of the bolts it causes the belt to move away from that side. So if it's the left side of the belt that's moving close to the rail then tighten the left side and vise versa for right. Turn the unit on and set the speed to about 3. Tighten the side that the belt closer to the side rail about a quarter turn. Be patient and give it a minute to settle after you adjust it. Repeat until the belt has moved back to center. If it moves too far just back it off a bit.

please see the video and fix it. God bless you

hi There.
A treadmill belt can shift to the right or left over time. If it shifts enough, this may cause the belt to stop moving. Stand at the back end of your machine and inspect the belt. If it has shifted, you will need to center it by turning the rear roller adjustment bolts. These bolts adjust both the tension and the centering of the belt. Follow the instructions in your owner's manual that explain which of the two bolts you need to tighten or loosen to shift the belt back to the center.
If the belt is too tight, it could cause enough tension that the motor can't turn the belt. This is most likely the cause of your belt not moving if you recently adjusted the belt tension due to slippage. Lift the edge of the belt. If you can't raise it at least 2 to 3 inches off the walking deck, the belt is too tight. Follow the directions in your owner's manual for loosening the belt. You will need an Allen wrench to loosen the rear roller adjustment bolts.
If the troubleshooting does not get the belt running again, you may have a tight motor belt or a bad motor. You will need to remove the motor hood to access these parts of your machine. If your treadmill is still under warranty, contact the manufacturer for a professional repair. You may void the warranty if you attempt to work on the motor yourself.
or read up some more at this link.
How to Fix Treadmill Belt That Won Move
or this one.
Acd3 treadmill belt wont move Google Search

At the end of of the running belts in the end caps will adjusting bolts you will need a allen wrench to adjust the tension. Start your treadmill and turn clockwise a 1/4 turn each time see i f you can stop the belt. You need to be aware that the drive belt can also cause this problem so I suggest that you remove the motor shroud and when you are adjusting whether the front roller is moving and the running belt has stopped or the roller has stopped and motor is rotating ( adjust Drive Belt)

Sounds like the starter winding is bad.
The cutter disc is welded directly to motor shaft. So is the allen wrench fitting.
So if disc rotates freely, then you should be able to feel the allan wrench fitting rotate too.
Use broomstick instead of hand down disposal.
If motor hums and cutter disc does not spin, but cutter disc can be moved freely, then disposal needs to be replaced.
I wish they made repairable motors so that metal and copper doesn't get thrown into the scrap recycle metal bin.

I wrote ez disposal replacement tips:
http://beta.fixya.com/support/r7929008-replace_garbage_disposal

Here is a basic procedure that will work for the majority of treadmills out in the market:
If the walking belt has shifted to the left, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn the left rear roller adjustment bolt clockwise, and the right bolt counterclockwise, 1/4 of a turn each. Be careful not to overtighten the walking belt. Plug in the power cord, insert the key and run the treadmill for a few minutes. Repeat until the walking belt is centred. b. If the walking belt has shifted to the right, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn the left rear roller adjustment bolt counterclockwise, and the right bolt clockwise, 1/4 of a turn each. Be careful not to overtighten the walking belt. Plug in the power cord, insert the key and run the treadmill

If the walking belt has shifted to the left, use the Allen wrench to turn the left rear roller bolt clockwise 1/2 of a turn; if the walking belt has shifted to the right, turn the left rear roller bolt counterclockwise 1/2 of a turn. Be careful not to overtighten the walking belt. Plug in the power cord, insert the key, and run the treadmill for a few minutes. Repeat until the walking belt is centred.

2.4L Engine
NOTE You may need DRB scan tool to perform the crankshaft and camshaft relearn alignment procedure.

1. Remove or disconnect the following:
   
   • Negative battery cable
     
   • Right front wheel and inner splash shield
     
   • Accessory drive belts
     
   • Crankshaft damper
     
   • A/C compressor/alternator tensioner and pulley assembly
     
   • Lower front timing cover
     
   • Upper front timing cover
     
   • Right engine mount
     
   • Engine mount bracket
     
   
   NOTE This is an interference engine. Do not rotate the crankshaft or the camshafts after the timing belt has been removed. Damage to the valve components may occur. Before removing the timing belt, always align the timing marks.
   
2. Rotate the crankshaft until the Top Dead Center (TDC) mark on the oil pump housing aligns with the TDC mark on the camshaft sprocket (located on the trailing edge of the tooth).
   
3. Loosen the timing belt tensioner lock bolt.
   
4. Insert a 6mm Allen wrench into the hexagon opening located on the top plate of the belt tensioner pulley. Rotate the top plate clockwise until there is enough slack to remove the belt.
   
5. If necessary, remove the camshaft timing belt sprockets.
   
6. If necessary, remove the crankshaft timing belt sprocket using removal tool No. 6793, or equivalent.
   
7. Place the tensioner into a soft-jawed vise to compress the tensioner.
   
8. After compressing the tensioner, insert a pin (a 5/64 in. Allen wrench will also work) into the plunger side hole to retain the plunger until installation.
   

Camshaft and crankshaft alignment marks—2.4L engine




To lock the timing belt tensioner, be sure to fully insert the smaller Allen wrench into the tensioner as shown—2.4L engine





Installation of the timing belt, notice the camshaft alignment— 2.4L (VIN B) engine


To install:

1. If necessary, use tool No. 6792, or equivalent, to install the crankshaft timing belt sprocket onto the crankshaft.
   
2. If necessary, install the camshaft sprockets onto the camshafts. Install and tighten the camshaft sprocket bolts to 75 ft. lbs. (101 Nm).
   
3. Set the crankshaft sprocket to Top Dead Center (TDC) by aligning the notch on the sprocket with the arrow on the oil pump housing.
   
4. Set the camshafts timing marks so the exhaust camshaft is 1/2 notch below intake camshaft sprocket. Make sure the arrows on both camshaft sprockets are facing up
   
5. Install the timing belt starting at the crankshaft, then around the water pump sprocket, idler pulley, camshaft sprockets and around the tensioner pulley.
   
6. Move the exhaust camshaft sprocket counterclockwise to take up the belt slack.
   
7. Insert a 6mm Allen wrench into the hexagon opening located on the top plate of the belt tensioner pulley. Rotate the top plate counterclockwise until there is no slack on the belt. The tensioner setting notch will start to move clockwise. Watch the notch and continue rotating the top plate counterclockwise until the setting notch is aligned with the spring tang. Using the Allen wrench to prevent the top plate from moving, tighten the tensioner lock bolt to 220 inch lbs. (25 Nm). The setting notch and spring tang should remain aligned after the lock nut is tightened.
   
8. Rotate the crankshaft 2 revolutions and recheck the timing marks.
   
9. Check the spring tang is within the tolerance window. If not within the window, reinsert the Allen wrench and into the hexagon opening located on the top plate of the belt tensioner pulley. Rotate the top plate counterclockwise until there is no slack on the belt. The tensioner setting notch will start to move clockwise. Watch the notch and continue rotating the top plate counterclockwise until the setting notch is aligned with the spring tang. Using the Allen wrench to prevent the top plate from moving, tighten the tensioner lock bolt to 220 inch lbs. (25 Nm). The setting notch and spring tang should remain aligned after the lock nut is tightened.
   
10. Install the engine mount bracket.
    
11. Install the front timing belt covers.
    
12. Install the A/C compressor/alternator tensioner and pulley assembly.
    
13. Install the right engine mount.
    
14. Install the crankshaft damper
    
15. Install the accessory drive belts and adjust to the proper tension.
    
16. Install the right inner splash shield and wheel.
    
17. Reconnect the negative battery cable.
    
18. Perform the crankshaft and camshaft relearn alignment procedure using the DRB scan tool, or equivalent
    

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there are screws on the back, use an allen wrench, one quarter turn at a time. To move it right, tighten the left, to move it left, tighten the right.