755 Deere (1988) brake issue

[Yourkie]

BTW it has about 1090 hrs and was purchased new. Not used much and kept under cover.

Brakes seem to be dragging (not releasing) and putting engine load on the tractor when moving it. Also the individual L/R brake pedals and main pedal on right side of station do not have the travel distance that is normal. In other words it seems they are already depressed (as in pushed in) in their resting state. The parking brake does not work as the brake pedal does not depress far enough to catch the locking cog. So it seems the linkage or connection to brake disk itself is messed up. Any experience with this? I've done some internet research and one possibility I saw was to spray the shaft and entrance to trans housing with PB Blaster and work the pedal.

My back is giving me fits and prevents me from doing the gymnastics now required to get under it, so I kind of wanted to get a confirmation on what might be best fix before I tried, and/or call dealer for a big outlay and delay in getting it in. Can't see anything obvious like branches in linkage.

Thanks in advance for any tips.

 

[beenthere]

Your internet findings I think were right on. Lack of use and lack of lubrication have caused the pedals to seize up.

 

[Harry in Ky]

BTW it has about 1090 hrs and was purchased new. Not used much and kept under cover.

Brakes seem to be dragging (not releasing) and putting engine load on the tractor when moving it. Also the individual L/R brake pedals and main pedal on right side of station do not have the travel distance that is normal. In other words it seems they are already depressed (as in pushed in) in their resting state. The parking brake does not work as the brake pedal does not depress far enough to catch the locking cog. So it seems the linkage or connection to brake disk itself is messed up. Any experience with this? I've done some internet research and one possibility I saw was to spray the shaft and entrance to trans housing with PB Blaster and work the pedal.

My back is giving me fits and prevents me from doing the gymnastics now required to get under it, so I kind of wanted to get a confirmation on what might be best fix before I tried, and/or call dealer for a big outlay and delay in getting it in. Can't see anything obvious like branches in linkage.

Thanks in advance for any tips.

I think it might be best to determine where the problem is before deciding who will fix it. While the brake shafts and bearings might well be somewhat rusted or stuck, the brake cam in the rear is also suspect. You might try removing a few cotter pins, disconnecting some linkage, and then see if the pedals move at that point or not. Also, with that done, you gain a lot of pedal travel so the spray can stuff can be more effective.

 

[Rainydays]

I was having the same problem with my JD4210H, my solution was to install an old drum brake shoe tensioning spring outboard on each side. They pull the park brake linkage back, ready for next application and don't interfere with normal brake operation. One end in the hole on the linkage, the other end wrapped around the axle housing retaining Ubolt with a securing nut. Works like a charm, hasn't failed since installed.

 

[loggin]

BTW it has about 1090 hrs and was purchased new. Not used much and kept under cover.

Brakes seem to be dragging (not releasing) and putting engine load on the tractor when moving it. Also the individual L/R brake pedals and main pedal on right side of station do not have the travel distance that is normal. In other words it seems they are already depressed (as in pushed in) in their resting state. The parking brake does not work as the brake pedal does not depress far enough to catch the locking cog. So it seems the linkage or connection to brake disk itself is messed up. Any experience with this? I've done some internet research and one possibility I saw was to spray the shaft and entrance to trans housing with PB Blaster and work the pedal.

My back is giving me fits and prevents me from doing the gymnastics now required to get under it, so I kind of wanted to get a confirmation on what might be best fix before I tried, and/or call dealer for a big outlay and delay in getting it in. Can't see anything obvious like branches in linkage.

Thanks in advance for any tips.

I'm with Harry on post #3. I would think that the linkage and lack of lubricant is highly suspect. I would make sure that everything to do with the linkage is well lubricated and then go from there.