873 Brakes

[DogDiesel]

Color me stupid. I have a service repair book, and I have been reading it on the issues with my 873 with 6016 hours. Read cover to cover once, and key parts repeatedly Problem. Apparently, I have no brakes. Neither off neutral or pedal. My pedal was un-used and stiff. Loosened it up and oiled it and it makes contact with the switch. I am in research mode now. I pressure washed this thing for 8 hours. It had the belly plate off, and was full of oily mud, stick, rocks and a wrench or two. Foot wells were filled too. While I have many issues, will focus on brakes. I have the L/R wheel not pulling, suspected to be a chain off, but haven't torn into it yet. So I will get into the brake disks. Issue: Before I start, I'd like to know how the brakes are activated. I gather electrically. I gather disk. Is there pads or actuators? Where? I looked online, and for parts, all I see is disks. Just want to get the concept of the brakes. Fuse is good, but otherwise haven't troubleshot anything. Service books has no brake troubleshooting, that I have found in my book. Wayne South Central Virginia

 

[antfarmer2]

On my 743 it has disc and brass pucks for brakes

 

[OldMachinist]

On my 743 it has disc and brass pucks for brakes

Look in the service manual for "traction lock", normally its in section 8.
The traction lock solenoid lifts a bar that drops down and stops the discs from rotating. Sometimes when the solenoid fails people just remove the bar and put the solenoid back on. So likely a previous owner has done that.