OM3023 10/00 Operation - Section 3 Operating Instructions Page 3-19 Emergency Brake Lever (5, Figure 3-2) Immediately after making an emergency stop, the parking brake disc will be at a high temperature. Do not make any parking brake adjustment until the disc has cooled. The parking brake must be adjusted after an emergency stop. For details of the method for releasing the brake, see BRAKE RELEASE, page 3-14. The lever (5) actuates the emergency brake. Parking Brake Valve Lever (6, Figure 3-2) This lever (6) is used to apply the parking brake. EMERGENCY BRAKE RELEASED: (TRAVEL/ UNLOCKED position). EMERGENCY BRAKE ACTUATED: (APPLIED/ LOCKED position). STOPPING IN EMERGENCY PARKING:
Parking Brake actuated. (Locked) When truck is moving, apply the emergency brake ONLY if the foot operated brake pedal and/ or the column mounted retarder lever do not sup- ply enough braking effort to stop the truck. TRAVEL: Parking brake released. (Unlocked) Use the emergency brake lever to bring the truck to a complete stop. When the truck has come to a complete stop, BE CERTAIN TO LEAVE THE LEVER IN THE FULL APPLIED/ LOCKED position. When the lever is set to the PARKING position, the parking brake pilot lamp lights up. If the pressure in the air tank drops below 313.8 kPa (3.2 kg/cm 2 , 45.5 psi), the emergency brake is automatically applied.
This actuation applies ALL brakes (front, rear, & parking brake) with all available pressure. Always apply the parking brake when parking or leaving the machine. If the emergency brake is applied because of a failure in the air system, the central warning lamp will flash and the alarm buzzer will sound. When the lever is set to the PARKING position, if the transmission shift lever is at any position other than "N", the central warning lamp will flash and the alarm buzzer will sound. AFTER MAKING AN EMERGENCY STOP If the air pressure drops below 215.7 kPa (2.2 kg/ cm 2 , 31.2 psi), the parking brake is automatically applied.
Immediately after stopping, move parking brake lever (6, Figure 3-2) to the APPLIED/LOCKED position, then place blocks around all wheels to secure the machine. For details of the method of releasing the brake when it is applied because of failure in the air system, see BRAKE RELEASE. Notify maintenance personnel immediately. Do not operate the truck until the cause for the emergency has been determined and repaired.