My kirby g6 shimmy's when pushing it - Kirby Vacuums

In the shop I would have a whole bunch of questions, so let me try to run a couple of solutions for you.

The things I initially check for are the roller brush adjustment and how high are you when vacuuming.

On the G6 there are 3 adjustments on the end caps 1,2, and 3. There is also a fourth position but doesn't have a number and don't recommend using this position. If it correctly adjusted these things last forever unless you own a golf course, restaurant, or childs day care. With a G6 if you vacuum every day I would imagine you should be on a 2 if you vacuum a couple of times a week a 1 or 2. The easiest way to tell is to take the floor nozzle off, flip it over and look at the end caps should be different color grays dark and light. You should at this point be able to tell the adjustment by the number facing you. If it is on the number 3 setting and you still have quite a bit of bristle move it to the number 2 setting put it back together and try it out. Roller brush adjustment can also be the culpret for many other things especially if your not adjusting the machine to correct hieght while vacuuming (see below).

If you have a really high pile carpet and your going all the way down this can cause the shimmy especially with a mis adjusted roller brush. When you turn the machine on with the heighth adjuster all the way up. Lower the machine one click at a time, until you here a tone change. It will go from a higher pitcher to a lower pitch as the roller brush begins to sweep the carpet. You can click one click past this but really don't want to go anything further it actually cuts down on the suction, and runs through belts quicker.

If you purchased the machine new at your home from the sales guy and in the pitch he talked about the piggy bank slot in the back if you have kids then perhaps your little one made a deposit into the slot. Either way it could be a coin stuck in the gears. It could also be that the gears themselves are slipping.

It could also be inside the transmission a peblle or large piece of dirt in the gears on the inside.

It could be the bearings in the rear axle assembly. It could be the slide assembly would definitely have to look at it to be for sure.

If your handy I could try to walk you through taking the machine apart and checking the the transmission yourself.

It the roller brush adjustment or vacuuming to at the correct height doesn't solve the problem you should probably have a tech look at it.