JUMPER 2F2461 - Caterpillar

Illustration 1 g06207265
View of parking brake valve
(1) Brake pedal control pressure oil port
(2) Hoist pilot oil port
(3) Front accumulator purge solenoid valve
(4) Rear accumulator purge solenoid valve
(5) Park brake solenoid valveThe parking brake valve is located along the left inner frame rail ahead of the left side rear tire.Brake pedal control pressure port (1) receives pressure oil from the service brake pedal valve and distributes the pressure oil to the service brakes. Park brake solenoid valve (5) is energized by the brake ECM to pressurize the park brake pistons which release the parking brakes. De-energizing the park brake solenoid causes the park brake pistons to drain allowing a spring to retract the parking brake pistons and engage the parking brake.Hoist pilot oil port (2) provides pilot pressure oil to actuate the spool inside the hoist valve.Front accumulator purge solenoid (3) drains the front accumulator and service brake circuit when energized. Rear accumulator purge solenoid (4) performs the same operation for the rear accumulator and service brake circuit when energized.