You need to pull the drum out in order to do this. While you have it apart you need to clean the dust and buildup from all air passages and blow out dust from motor. Take it apart and clean blower wheel, also. You should be able to see how to do this fairly easily if you are mechanically minded. It is best to put drier in garage where you have plenty of space and lay it on its back to pull drum. You may need to support the back on blocks to prevent damage to vent pipe. After drum is pulled stand it back upright to work on the rest of it. You also want to replace the belt while you have it apart. Bearings on a drier need high-temp white grease, but if it has already run dry the only solution is to replace the bearing. DrTom4444