To replace the front wheel on your L130 John Deere lawn mower you need to first take out the old one. Place the jack under the front wheel frame of the lawn mower, then place the new bushings over the axle hole in the wheel.
you would have to get another transimishon for the front and a axle like the back
you probably need a pair of snap ring pliers
I know only the simple machines in a lawn mower. Wedge, lever, wheel and axle, and screw.
Yes a lawn mower is a compound machine. Example: The wheel is a wheel and axle.
Typically there is only one pad and it is on the right side of the rear end as you are behind the mower and looking at it. It is in front of the axle shaft. You can adjust it there or unbolt it for any other maintenance.
That will depends on the manufacturer and model of transaxle that is under the mower.
A gas lawn mower is a lawn mower which is powered by gasoline.
Depending on what made it go crooked : If it is wear you can replace bushings or bearings (might have to replace the axle shaft to.) that should fix it. If it has a bent axle shaft then you can take the wheel off and take a pipe put it over the end of the shaft and bend it back to straight. If you mean the toe in or out you can unbolt the swivels on the pull arms and adjust them that way. Hope this helps.
A compound machine is a machine made up of two or more simple machines. So a lawn mower, push or riding, has Wheel and axle set ups, levers for the throttle and mower blade. That's why it's a compound machine.
Don't know that you'll get much trade in value on a used lawn mower. You may be better off putting it in your front yard with a for sale sign on it.
How to Change the Tires on Self-Propelled lawn Mower