Traction 4200 Hydrostatic positive lock won't engage completely

[beenthere]

What is a good way to test if the posi-lock is working?

I've never felt good about using it on my 4300, as have been too nervous about breaking something in the process. Also, never really knew that both wheels were locked in, as tough to see the wheels spinning (or not) when hidden be the fenders.
Usually if one wheel loses traction, applying some break pressure to that wheel will cause the other wheel to take hold.

dfkrug
Is the part you reshaped listed as an item # in post 3 of kennyd and if so, what is the item? Am thinking #12 is one or the other.

 

[beenthere]

What is a good way to test if the diff-lock is working?

I've never felt good about using it on my 4300, as have been too nervous about breaking something in the process. Also, never really knew that both wheels were locked in, as tough to see the wheels spinning (or not) when hidden be the fenders.

Usually (for me) if one wheel loses traction, applying some break pressure to that wheel will cause the other wheel to take hold.

dfkrug
Is the part you re-shaped listed as an item # in post 3 of kennyd and if so, what is the item?

Here is image of service book on removal. (sorry for TBN's double post)

 

[texasranger556]

It was icy out when I bought my tractor so I put one tire on an ice patch and the other on pavement. Held down the diff lock then hit the hydro pedal. The tire on the ice spun while the other on the pavement sat still.

If you have a loader you could push up against a tree and see if it spins both tires with the diff lock on vs off. Or jack up the back end and have someone hold the diff lock while spinning one wheel to see if the other turns the same direction (transmission in neutral). Even a worn diff lock may seem fine on a jack though.

You can certainly use the steering brakes to limit wheel slip, but it is nice to be able to just hold down the diff lock in certain situations.

 

[dfkrug]

Is the part you reshaped listed as an item # in post 3 of kennyd and if so, what is the item? Am
thinking #12 is one or the other.

Item #12 in the diagram is what I am holding in my hand in my photo. This side of the dog clutch
meshes with the 4 teeth on the ring gear, not in the diagram.

Using the brake on the slipping rear wheel will do the job of a diff-lock or LSD; that's what some
cars do with their ABS systems to control rear wheel spin. When the controller senses
wheel spin, it applies braking action to the offending wheel.