Flip the Kirby over,and you will find screws that hold the front axle in place.Remove the screws and the front axle.Debris may be caught in the mechanism.Clean the debris out,and use WD-40 to lubricate the mechanism.May be able to do this without removing the axle,but removing it allows for better cleaning or for identifying broken or missing parts.
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there is a switch for that will be made a neutral position and a working position if you work with the brush for carpet cleaning.
If its stands left down (white N) its neutral and if right step on it it comes in working (Green D ) in down position . example of an G4
Here is a step by step walk through with pictures on how to replace the neutral / drive pedal on any Kirby Generation vacuum (G3, G4, G5, G6, Ultimate G, Ultimate G Diamond Edition, Sentria and Sentria II) Kirby Neutral Drive Pedal Replacement Guide
I believe you are talking about the pedal that selects powerdrive. That shaft end is stamped on in manufacturing. If you take it apart you'll see where it is to hold the shaft in place. When we see them it normally requires a used transmission. There may be a kit or something available to you to repair this from kirby but you should be fairly handy if you decide to start taking your that part of your machine apart.
The N/D on the back is for the toe touch lever there and it stands for Neutral / Drive. When unit is on place the lever (push down) in the D position and it is a clutch assist to make it push easier. When unit is off, place in the N position to release the clutch and roll it around. Usually the plugs occur where the bag attaches the unit, disconnect bag and check there. Also insure the roller brush is working.
The G4 has a magnetic block on one end of the brush. It must be aligned on the LED end of the brush housing. ..with adjustment screws facing out. When setting the housing back in place use the pedal to lift the carpet nozzle up off the work surface
please clarify what you mean?
Do you mean motor bearings or brush roll bearings?
brush roll bearings can be adjusted to lower the brush closer to the carpet when worn.
to do this remove the front brush assembly, there is usually a sticker below the belt hole showing RED = POSITION 1 HIGHEST (ie a new brush roll)
GREEN = POSITION 2 MIDDLE (brush part worn)
BLACK = POSITION 3 LOWEST (brush fully worn)
At each side of this there are 2 clips unlock these and remove the bottom cover.
Release the belt tension by rotating the belt release at the front.
Before removing the brush roll, at each end of the brush roll there is a grey plastic bearing carrier (Square at the ends) MARK this with a pen or marker just so you know the original position, also look closely for the coloured markings as indicated above or numbering 1,2 or 3.
If RED or "1" is showing you need to remove the brush roll by pulling it out and rotate the endcaps to Green or "2" and re-insert the brush roll, If Green or "2" is showing then rotate the endcaps to Black or "3" and re-insert.
If Black or "3" is showing then the brush roll is worn and cannot be adjusted any more, fit a new brush roll and insert with RED or "1" showing.
To re-attach the belt, move the belt to the middle of the roll and rotate the belt knob at the front ensuring the belt engages with the hook on the inside.
Remove the nozzle and remove the front wheel shaft. Take these 2 screws out.
When doing so - watch for the spring that is under the top pedal, do not let it fly out of window. If you will find that shaft is bent buy and install a new shaft (you can find all parts HERE). You may try to straighten it but usually it doe not last long - wheel ***** falls off and you have to buy new shaft anyway. If shaft seems to be ok - clean old grease and dirt, lubricate well the pedal teeth and assemble everything back. This should solve the problem. Occasionally spring may be broken but this happens very rarely.
Vacuum thoroughly before shampooing for maximum cleaning. Then, remove the bag and the Power Nozzle to prepare for shampooing.Turn the Carpet Shampoo System Nozzle Belt Lifter to the right of the center position (fully clockwise) until the green arrows line up. Slide the slots on the side of the Carpet shampoo system over the outer shoulders of the Carpet Shampoo System Tray. While pushing up on the Belt with your finger, turn the Belt Lifter left (counter- clockwise looking at it from the front) until the red arrows line up. (The Belt Lifter Hook will catch and stretch the belt.) Press the bottom Toe Touch Pedal all the way down to raise the front of the Kirby.
While sliding the carpet shampoo system Nozzle/Tray Assembly toward the Kirby and over the Motor shaft, connect the hooks on the bottom rear of the nozzle to the Attaching Bar.
Push the nozzle up against the Kirby and turn the Accessory Lock to the right (clockwise) to lock the nozzle in place. To engage the belt, turn the Belt Lifter all the way to the right (clockwise) until the green arrows line up. Then lower the Headlight Hood