MANIFOLD-CENTER 3T2695 - Caterpillar

Do not engage the parking brake while the machine is moving unless the primary service brake fails. The use of the parking brake as a service brake in regular operation will cause severe damage to the brake system.
Parking Brake Engaged
Illustration 1 g00821572
Parking Brake Engaged (1) Cable housing (2) Lever (3) Cable (4) Cam (5) Collar (6) Axle shaft (7) Brake discs (8) Pressure plate (9) Parking brake pedal (10) Sprocket (11) Releasing pedal (12) SwitchParking brake pedal (9) is located in the floor of the cab to the right hand side of the accelerator pedal.Pedal (9) is pushed fully forward in order to engage the parking brake. The pedal is secured in the engaged position by sprocket (10) .As pedal (9) is pushed forward, cable (3) is pulled through cable housing (1) in order to rotate levers (2) and cam (4). The cam pushes nonrotating pressure plates (8) into contact with rotating brake discs (7). The brake discs are splined to collar (5). The collar is splined to axle shaft (6). Axle shafts (6) are therefore prevented from rotating. When the parking brake is applied, switch (12) sends a signal in order to disengage the transmission.Parking Brake Disengaged
Illustration 2 g00821574
Parking Brake Disengaged (1) Cable Housing (2) Lever (3) Cable (4) Cam (5) Collar (6) Axle Shaft (7) Brake Discs (8) Pressure Plate (9) Parking Brake Pedal (10) Sprocket (11) Releasing Pedal (12) SwitchThe parking brake is disengaged by pushing down on releasing pedal (11). At the axle, cable (3) releases levers (2) in order to allow cam (4) to rotate away from pressure plates (8). Brake discs (7) which rotate with axle shafts (6) are now free to rotate between pressure plates (8). The axle shafts are also now free to rotate.When the parking brake is disengaged the signal from switch (11) is disconnected and the transmission can then be engaged.