I tried to replace my fan, but I stripped out the spot where you put the wrench on the motor armature. Once I knew that was ruined, I put vice grips on it just to remove it, but it still wouldn't come off! I know I have to replace the motor armature now, but I still can't get the front shaft to unscrew. BTW, I'm turning it to the right.
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Re: Fan replacement gone bad!
I take it the armature is not moving at all when you are turning the pulley(to the right, is right). You may have to pull the motor asm. out, remove the 4 scres and nuts off of the front bearing plate and pull it out along with the armature. I can't rmember if there is enough romm after pulling it out, from the inside to cut the shaft off with a hack saw. It is either that or replace the front bearing plate along with the armature.
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The armature that holds the fan on is reverse threaded. It turns to the right to remove it. You can put a nail or nail punch in the hole on the armature and tap it gently to the right. this should loosen it enough to unscrew. There's a washer, then the fan, and a spacer that fit over the shaft.
The likeliest causes would be a large item sucked up and into the fan, causing a loud rattling noise, or a piece of the fan broke, resulting in the same noise. This means replacing the fan assembly.
The armature brushes could also be worn down to the point of causing the brush holders to contact the armature, which will, and probably has, ruin the motor. A replacement of the motor is necessary.
Cost of repair/replacement would probably be higher than the vacuum is worth.
First remove the handle, next remove the screws attaching the cord, and switch trim plate. The small screw and knob on the handle pivot must be removed to remove the switch trim piece - insert a flat screwdriver into the small slot in the plastic and pop the trim off to expose the rear motor shell screws. Remove the four screws holding the upper motor shell in place to expose the fan housing screws. Remove the five screws holding the fan housing in place, noting their positions. Pry the fan housing off to expose the fan. Hold the fan in place while turning the belt pulley CLOCKWISE to remove it. If the armature turns, it must be held in place with an open end wrench (about 9mm). There are flat spots on the armature just in front of the commutator bars. Pull or pry the fan and associated washer off the armature shaft. After replacing the fan and pulley, put a bead of silicon sealant on the fan housing and replace all parts in reverse order of removing.
You really don't want to get into the vacuum. After you get in, there's not much that you can do other than look. If you really want to get in, there are two strips,one on each side of the cleaner under the rubber bumpers. The strips have to be removed by pulling off the bumper and pull them out the front of the vac.This is not easy. The bearings are not replaceable. If the armature is gone, you can have a armature and bracket kit installed instead of a new motor and save some money. The armature comes with the bearing pressed on the top.
I am assuming that you are trying to remove the fan. On newer models there is a cut on the shaft (rear of the motor - next to comutator) that allows to use a wrench to hold the armature, it may be very similar on older models. maybe a hole instead of the cut... You would have to access the rear of the motor though. Let me know if you cant find it - I'll take one Heritage apart here in the shop and will see.
Take the bag asm. and handle off. Then remove the plastic strip covering the switch, remove the screw there, remove the 3 screws on the housing, turn it over and loosen the screw near the back, the housing should come off. Then remove the screws on the back of the fan casing. You shouild be able to get to the fan, hold the fan and turn the spindle to the right to take off. If it would turn off, then you may have to lock the armature so it can't turn to move it. Then re-asemble in reverse.
Take off the bottom plate, remove the screws for the motor and fan chamber, remove motor from fan housing, remove the nut for the fan. You may have to lock down the armature if the nut is too tight. Replace fan and reinstall motor into the fan housing and reinstall.