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Tear apart all hoses and make sure no clogging, also take apart to expose motor and make sure their is no dust on motor, this will cause symptoms you are describing, another thing check Impeller fan and make sure the fan is running and not blocked if fan is not working then will need to replace Impeller.
Yes-- This is the big disadvantage of this type of Vacuum-- Stones and sand wear heavily on that impeller turning a very high rate of speed.
This can be a tricky job----- depending on how long this fan has been on the motor shaft-- and if water has been passed thru this joint-- -- It will take a complete disassembly of the power section of this vacuum-- (I have seen a few times, when the impeller could be just hit a solid blow in the 'un-tightening direction, and the impeller spun right off- -- Very god, if you can get that response! :-) )
Most of the time one has to tear the motor apart, and get a solid grip on the armature (Clamping it firmly-- but gently in a vise -- and then beating on the impeller to remove it.
Naturally-- you would need to have the correct impeller ready to spin right back on the shaft-- for the old impeller will be ruined in removal. Be sure to put some 'never-seize' on the thread, to make it easier to remove NEXT time!
How old is the machine? Ever consider trading it in on a new type of Vacuum?
this could be the impeller fan next to the motor shaft under your attachment hose connection.
to determine this, remove the hose from the unit, and turn the fan shaft with your hand looking down inside the unit. You should see blades on the impeller fan, and they should all look squared off and curved. If any of them are broken or worn, it will make the unit louder than normal.
Also, the hose attchment has an increased noise more than using the brush attchment anyway because it increases the suction for the hose more than on the carpet. IE the motor runs faster giving you more suction.
An Impeller fan for the G3 Kirby will run about 18-39$ for the fan. More for labour.
Most Hoover uprights are a "fan first" design, meaning that all dirt enters the motor , hits an impeller fan and is blown from there into the bag. You will need to open the vac, remove the belt and two C shaped clamps holding the motor in place and remove the 4 screws holding the fan cover. Look for a broken or damaged blade on the fan. It is a threaded fan and can be purchased at most vac shops. Reassemble in opposite order. Post back to advise what you find
In order to replace the fan you will buy a 2 or three piece lexan fan kit containing the fan a spacer and shaft. You must remove the carpet head and then looking from the back of the machine you will find a series of philips screws on the outer edge of the fan housing facing towards the front, several of which may be partly covered by the motor housing. You will remove the forward facing screws to allow the housing to separate and reveal the fan. If you are lucky there will be a sideways hole through the impeller shaft allowing you to slip a nail through to help twist the saft to unscrew it while holding the fan . The shaft will turn off revealing a threaded motor shaft with spacers which the broken fan will slide off revealing a second spacer at the back . Be sure to replace these spacers in the same order when re-assembling the unit. Secure the shaft hand tight. Post back to advise if you need further help
Yes, I would say the crack is causing the screaming sound.
Usually the fan (impeller) is held on with a left-hand nut. To remove it, you have to hold the motor somewhere (sometimes you can just hold the impeller), put a wrench on the shaft nut and turn it clockwise. The impeller should then just pull off (with possibly some wd-40 and a little muscle).
usually, by the time that a large clog has built up in the narrow neck behind the brushes,
that is easy to find when the cover plate is removed,
some has also got into the fan impeller,
not so easy to see
and restricts suction
the fan housing is held on the front of the fan & motor with clips, it disassembles easily and the lint and such can be flicked out of the impeller
then the exhaust of the motor to the bag can be likewise cleaned
Is the water seal in place or missing? Another cause would be a bad motor, running at a slower speed will mean low suction. If it is a motor, then you would have to replace it. Is the suction low at machine without the hose, if it is ok then may be a clog in the hose.
I just went through the same thing. Your fan or impeller is probably broken off the shaft and no longer on the motor shaft. My local repair shop wants $9 for the impeller and $29 to replace it. You will have to take the thing apart and put on a new fan or impeller blade and I'm still trying to do that to my vac. I think I will have to heat the nylon impeller with a hair dryer to get it onto the shaft and then tighten the left hand nut. My vac is held together with torx screws so add a torx screwdriver to the price if you don't have one and want to do the job yourself.