Eureka Altima (yellow)

try this link below
http://www.eureka.com/en-US/Customer-Service/Videos/

Tammy May:

Unplug the machine and remove the foot plate (at the bottom of the vacuum head) and check the belt that drives the beater brush/bar. if the beater bar is hard to turn, pull the beater bar and belt out, check the inside circumference of the belt to see if the motor shaft has worn it down in one spot. If so, remove the two bearings (one at each end of the beater bar) and remove the hair, carpet fibers, strings and any other junk from the bearings and the ends of the beater bar. lubricate the bearings with oil (thin machine oil like 3 in 1 oil works best. roll the bearings with your hands until they spin freely. Now would be a good time to check the bottom of the foot plate where the dirt is vacuumed up. check the hole in the middle of the foot plate and check the hose for clogs if the hole and foot plate hole are clear, reassemble the bearings on the beater bar and install the beater bar (with a new belt) and reinstall the foot plate. The machine should run well for you.

Most probably a clog in the neck. This is where the power head connects to the body of the machine.

Remove the base plate (screws in). Take a look at the back of the head behind the beater bar. There is likely something blocked in the neck of the unit. Clear it out and you will likely me OK.

While it is open take the time to remove anything wrapped around the beater bar.

Good luck, please rate this answer if it helps.

Remove the base plate. It is held with screws accessible from under the unit.

Inside you will see the beater bar and the belt.
Remove the beater bar. This is self explanatory once you see inside the power head.
Remove the old belt.

Find a replacement from your local dealer or online.

Replacement is the reverse of removal.

This is a simple job you only need a screwdriver.

Good luck, please rate this answer. Thanks.

Are you sure there is an obstruction? Even though the brush is spins, you probably need to replace the belt because it is stretched. It is probably slipping on the beater bar..

Jim

Check the sole plate where the beater bar is. You may have to remove the roller brush flap to get into the roller brush and then check the main dust channel beside it. Usually if there's no suction on the hose it means that:
1) The hose is blocked 2) The filters are needing cleaned / washed and dried for 24 hours or see my tips! 3) There is dust clogging after the beater bar/roller brush.

With the vacuum unplugged, turn the machine beater side uo. On the plate that surrounds the beater bar, look for release tabs to open the plate. Flip them and set the plate to the side. The beater bar rides in sockets. Remove the bar, install the new belt around the motor shaft, then work the beater back into the sockets. Replace the plate. Test your work by rotating the beater bar by hand, making sure that it is reinstalled correctly.

Best Regards, --WoobieDog--

Bearings in the end of the beater bar have gotten dry/ dirty and created enough heat to melt the ends.
I'm afraid you need a new beater bar.

If it smells hot, then there's a strain on the motor no doubt about it. Check the suction channel behind the sole plate and remove all of the hoses to check for a clog. It could well be that there is a clog inside the machine after the dust channel from the beater bar and before the main hose assembly goes into the bin. Usually a wire brush or just a blunt stick can remove clogs but please be gentle. 
Belt replacement on the Altimas occur on top of the hood, look for crosshead screws on the left hand side and then possibly on the other side where the pedal release is. Also there may be two crosshead screws on the front where the top of the beater bar housing is on either side. 

If the 2 stage filters inside the bin chamber have not been washed then they will need to be - they sound like they are clogged or somewhere there is dirt which is blocking up the system. Also check the side part duster to ensure that the airways are not clogged with dirt.

When you turn the machine on, have a look to see if the moving brush is actually spinning. Then switch off and remove the base plate to see if anything is clogged in the main dirt channel which is usually located on the left or right hand side - where the dirt goes in from the floor.

This model is based on an Electrolux model in the UK which can be notorious for clogging dust. Check the hoses at the bottom where they come from the main dust bin and the air ways to check no dust is stuck.