Brake Fluid.
It could just be that when you push the brakes the fluid level goes below the proper level. add fluid and see if stops.
WHICH fluid.
check fluid level
On a Ford Ranger , DOT ( 3 ) brake fluid
The 1968 Ford F600 grain truck typically requires a 12-volt battery, often in the size Group 31. This size provides the necessary cold cranking amps for reliable starting and operation. It's always best to check the owner's manual or consult with a parts specialist to ensure the correct specifications for your specific model.
Regular DOT3 brake fluid
Dextron 5
DOT3
The best way to tell when you need brakes is by squeaking, when the brakes are rubbing against the metal, when your brake pedal goes all the way to the floor and when you are running out of break fluid.
No you can not. If you do it can ruin your quad brakes and possibly your engine. If you do and something goes wrong you could have to spend a lot of money to get it fixed if that.
ford type f or mercon fluid [you can also use dextronII but I wouldn't recommend it!!
type f auto-trans fluid