Power drive Belt is OK - switch is on. Could something be wrong in the handle - switch area??

There are a few things it could be. Pull the handle back into the vacuuming position and turn the brush bar switch on and off while listening to see if you can hear the brush bar motor turn off and on. If you can hear the brush bar motor running it may need a new belt and/or the brush bar may be seized up.
There is a switch by the main power switch that provides power to run the brush bar motor. There is a micro switch down in the motor area that closes the circuit to the brush bar motor when you pull the handle back. Check electrical connections and all of the above parts to determine which one or one's may be defective.

There are a few things it could be. Pull the handle back into the vacuuming position and turn the brush bar switch on and off while listening to see if you can hear the brush bar motor turn off and on. If you can hear the brush bar motor running it may need a new belt and/or the brush bar may be seized up.
There is a switch by the main power switch that provides power to run the brush bar motor. There is a micro switch down in the motor area that closes the circuit to the brush bar motor when you pull the handle back. Check electrical connections and all of the above parts to determine which one or one's may be defective.

Make sure the replacement belt was the right one/size.
Make sure the self propelled is on at the handle. If you replaced the flat belt and it still pushes hard the most common problem is a broken power drive cable or actuator arm. Put the handle down and move the power drive handle forward and backward. If it moves freely watch by the headlight for the cable to move the actuator at the base. If the cable is in tact it should move the actuator. If it is broken the actuator will not move. If the actuator is broken the piece of plastic holding the cable will let the cable slide or it may be broken off completely. Replace whichever is broken.
If the cable system is ok and the belt is correct you may have a bad powerdrive assembly. I will include links to correct replacement parts.

Actuator
http://www.vacuummedic.com/product.php?id=363

Cable
http://www.vacuummedic.com/product.php?id=362

Belt
http://www.vacuummedic.com/product.php?id=6


Good Luck!

It would be very unusual to have a transmission belt problem. To access the belt; the handle, and switch cover plate are first removed. Next remove the 4 screws that hold the upper motor cover in place. Next remove the switch button by prying up gently on it's attaching lugs and pull it free of the switch actuating rod. 3 screws hold the transmission to the base. DO NOT remove the screw in the rear beneath the on/off pedal. By dropping the power drive assemby slightly down, you should be easily able to remove the belt.
P S: I have repaired 100's of power drive Kirbys, and have never seen a bad power drive belt. If the self-propel seems to work poorly, it is usually because the rear wheels are worn out.

The power drive has a geared belt on the end on the armature which operates the power drive. The power drive has been out since 1990, and I have yet to see a bad drive belt in 1000's of repairs. The drive unit itself will fail very infrequently, and need replacement. The belt can be accessed be removing the handle, switch plate, and upper motor shell. The power drive unit must be loosened and dropped down to remove the belt.

Note: The brush will not rotate when the machine is locked in the upright position, because an internal micro-switch turns the brush motor off.

- Check the belt through the clear brush cover. If this appears damaged or broken, please take your machine to a local BISSELL Authorized Service Center to have this replaced. If the belt is intact, please continue checking the following:
- Ensure both power switches are turned on when you check for brush rotation.
- Unplug the power cord and remove the handle completely. Slide handle back into the lower section of handle, ensuring the screw is in tight. If the handle is not aligned properly, this will affect the power of the brush motor.
- Look for debris wrapped around the brush (i.e. string, hair, fibers, etc.). When the machine is unplugged, cut away any visible hair, fibers or debris from the brush roller. This brush is NOT removable from the machine.
- If something has become lodged in the foot and the brush shuts off, turn off the vacuum and unplug this from the outlet. You can now remove the obstruction. The brush will automatically reset when the vacuum is plugged in and turned back on.

If you continue to experience difficulty with this, please take your machine to the following Service Center in your area. The warranty on this machine is five years.

Note: The brush will not rotate when the machine is locked in the upright position, because an internal micro-switch turns the brush motor off.

- Make sure brush switch on the handle is on.

- Check the belt through the clear brush cover. If this appears damaged or broken, take your machine to a local BISSELL Authorized Service Center to have it replaced. If the belt is intact, please continue checking the following:
- Ensure both power switches are turned on when you check for brush rotation.
- Unplug the power cord and remove the handle completely. Slide handle back into the lower section of handle, ensuring the screw is in tight. If the handle is not aligned properly, this will affect the power of the brush motor.
- Look for debris wrapped around the brush (i.e. string, hair, fibers, etc.). When the machine is unplugged, cut away any visible hair, fibers or debris from the brush roller. This brush is NOT removable from the machine.
- If something has become lodged in the foot and the brush shuts off, turn off the vacuum and unplug this from the outlet. You can now remove the obstruction. The brush will automatically reset when the vacuum is plugged in and turned back on.

This vac has 2 belts. If both self propel and roller not spinning then most likely it is the wide flat belt broken or off. 4 screws on the bottom should gain you access to the belt area. another issue for this model series is a worn pulley on the roller, a new belt when inserted around the roller should be even with the top of the pulley groove.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

my vacuum cleaner does not turn on
could it be the motor out
i check the switch it ok not getting any power to the switch

The best solution to any Oreck vacuum problem is to replace it with another brand. You are going to continue having problems with the Oreck..Not that other brands don't have problems. But, at least with
other brands the problems don't occur as often. Belt burning up. clogs, roller brush bristle wearing down prematurely, cord breaking internally, etc.
P.S. Oreck is good at one thing. Marketing!