Actuator
Control valve
Air service unit
Pressure relief valve
Spur gear
Spiral gear
Rotor gear
Helical gear
Less pedal play
More pedal play
Defective unloader valve
Defective front wheel slack adjuster
Release the air to the brake valve
Allow the air in to the air tank
Maintain the required air pressure
Continuously allow the air to the atmosphere
Relief valve
Shut of valve
Non return valve-1
Non return valve-2
