Brake pedal sticking

Hi rc, get back to work. ( I should talk) I had that happen too, and I think the brake valve under the pedal is sticking or the hinge on the pedal, but it's probably the valve. I had to replace mine on the old Pete.

 

I have had the hinge stick on mine due to corrosion I guess. I just applied some WD-40 to the hinge and also a little penetrating oil. After a couple applications it gets better. Seems like it needs it every year or so. Probably from the salt in the winter.

 

PB blaster the joint, maybe a little wire brush.
If you can pull it back up by the pedal them it sounds like just the hinge on the bottom of the pedal.
If the brakes actually stay on and won't release with the pedal floppy n loose...get it loose with some needle nose channel locks, & use your trolley brake until you can get it to a shop for a fresh treadle valve.
On my W9 it was a ##########...for the guy I paid to do it-and it was worth every penny! Can't imagine a T6 is anything but harder.

 

I had this happen one one of my t-600's also. I just sprayed some penetrating oil in the hinge area the best I could and just worked it up and down with my hand till it got easier move. It takes awhile for the lubricant to get in the joints. It always happens to the one truck we have and not sure why it happens. It pulls this stunt once a year and after the trucks sits for a long time. Good luck

 

Actually, if it is the hinge, you might want to knock the hinge pin out, and clean it up, as it will happen again.

 

I've taken the hinge pin out and cleaned them up on 3 Kenworth's we've had including the W9 I'm in now. Tried lubing the first couple but it didn't last long. I was amazed that they all came apart so easy. I was expecting a battle.

 

If the treadle valve itself is stuck, not the hinge, you'll probably have to replace the treadle valve. The one on my W9 is stuck on the floor so anytime I have to move the truck around my back yard I have to vise-grip the lines shut so the brakes stay released.