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If the radiator fan is powered by an electric motor, shut off power when the fan gets slow, then try turning the fan by hand to see if the bearings turn freely. If it feels stiff, gummy or full of grit, service the bearings or replace as needed. If it's not a bearing problem, check the electrical connections for corrosion. It's also possible the motor needs to have the brushes replaced; worn brushes don't make a reliable connection to the armature. and heat could exacerbate the problem.
If the fan is belt-driven, check the belt tensioner.
cordless drills have a switch that allows for more torque at lower rpms si in effect it is a 2 speed drill coupled with a variable speed switch that alters the rpms
If the drill is running I would be looking at a speed control problem at this point I would be looking at the torque control switch
Could have the brushes stuck in their holders - sometimes you need to release them by bending a tab.
Check the motor is not stalled (by stuck bearing) - but is actually not receiving power.
Hi. Sounds like you have worn out motor brushes. the brushes wear down to short and get stuck in the brush holders. Sometimes the caps that hold the carbon brushes in come loose, and the carbon brushes get stuck because the current arcs between the carbon brush and the brush guide. Get a serviceman to overhaul the motor, and it will work fine. Probably a good idea to replace the motor bearings at the same time. Good luck. Neil.
When a brand new belt breaks in 5 seconds, this can only mean 1 of 2 things.
1. The roller brush itself may be bad and need replacing. If the roller brush's bearings lock up, and the brush can no longer spin freely, this will cause the belt to burn up immediately after you turn the vacuum on. You may test your roller brush by taking it out of the vacuum, and hold it on the very ends of the brush with your fingertips. Make sure you are only holding the bearing caps and not the brush itself. While holding the two bearing caps with your pointer fingers, try to spin the brush with your thumbs. Does the brush spin freely? If no, then you'll need to buy a new roller bush for your vacuum, unfortunately the bearings are not sold separately on Hoover vacuums. If the brush did spin freely (you should get at least 7 rotations out of one spin) then see reason number 2 below.
Your model uses Hoover Agitator Brush Part 48414132.
2. The belt was installed incorrectly. When a belt breaks immediately like this it can also be a result of it not being installed properly. When installing the next belt, after you have put the roller brush back into place, pull forward on the belt to make sure that the brush spins when you're pulling forward. Sometimes I pinch the belt underneath of the brush roller, and it will not spin freely, and will burn immediately if the belt is pinched.
It really can only be one of these two problems. I hope that this repair solution was helpful to you. If you need me to clarify something, please just request clarification here. If it did help, please be sure to rate my repair Helpful. Thank you so much!
Just a comment-Based on experience, I would go with BOTH their suggestions and order brushes and bearings.
That squeal is definitely the bearing; it is a sleeve bearing; RPMs too high for a ball bearing to last and the sleeve bearing has a solid lubricant cast into it.
You have either one of 2 problems. Either you have a brush that is hung up and burnt or the armature is bad. If you are comfortable in removing the brushes first unplug the tool and remove the brush caps. Pull brushes out and look at the spring making sure not collapsed and then the end of brush that rides on armature for a burning look. Then I would look into brush tube and try and turn by hand the roller to look at the segments of armature best you can. If this needs anything other than brushes I would take it to a repair shop. Good luck
Dave
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