What is this part? (9 Viewers)

[dplenty99]

What is this and what does it accomplish or why was it added? And what does the “dial” do?Thanks

 

[brian]

brake balance front/rear..

 

[charliemeyer007]

Brake lock or proportion valve. Do you have disk brakes up front and drums in the back?

 

[numby]

Brake lock or proportion valve.

Adjustable proportioning valve.

Do you have disk brakes up front and drums in the back?

Almost guaranteed.