CABLE NAME

[J_J]

This is the so called Hydroback assembly. There is nothing hydraulic about the cable. It is composed of two opposing springs, when adjusted right, will keep the tram pump in neutral.

 

[J_J]

This is the Hydroback broken down.

 

[J_J]

This cable goes through the Hydroback. and hooks to the linkage.

 

[J_J]

I cleaned out the Hydroback, and lubed the springs, body of the Hydroback, all linkage. and cable with a Teflon lubricate. I have to call Terry and discuss where the starting point is. I am going to put the PT up on blocks to safely adjust the Hydroback. It wasn't difficult to take apart and clean every thing.

 

[bjustice]

JJ,
Good job on the pictures, thanks. Were you able to pull the cable from its' housing to lube it? Are you happy with the results? Somehow I missed the posting of the pictures until today. I plan to remove my cable/hydroback and perform the same procedure. It appears that the cable/hydroback for my 2422 is identical to yours. Still no answers on the hydraulic diagrams for my machine--I guess there aren't many 2422/2425 machines on the forum. The diagrams should be the same or very similar to the 422/425, I would think.

 

[J_J]

I took every thing apart at the hydro-back assembly. The hydro-back is nothing more than opposing springs that try and center the lever on the hydrostatic transmission. You can pull the cable out of the hydro-backYou can't pull the cable out of its housing, but it will move about 2 in. You can then drip lube fluid down the cable. I used some stuff that had Teflon in it, and sprayed the hydro-back with it. There is a certain procedure that you have to do to re center the hydro-back. Call Terry right before you do this. You have to put the PT up on blocks, or it might take off and run over some one or some thing. I did notice something strange when the PT was up on blocks, With the engine off, if I turn the right rear tire, the left rear tire turns in the opposite direction. The front tires do not move. When I turn the right front tire, the left front tire turns in the opposite direction. Can any one explain this. I was thinking that if you turn one tire, all the other tires would turn.

 

[MossRoad]

Not quite sure how it works, but it is a series parallel circuit. What you observed is what needs to happen when you turn the steering wheel while standing still on an articulated unit. The inside tires roll towards each other while the outside wheels roll away from each other, yet when you step on the go pedal, all the wheel turn in the same direction, but the inside wheels turn slower than the outside wheels. To top that off, you can turn the steering wheel left, right, left, right while traveling forward or backwards or stopped and the circuit adjusts constantly AND NO TURF SCUFFING EVER OCCURS!!! Simply ingenious, to me at least! /forums/images/graemlins/wink.gif

I wonder who figured it out?