OPERATIONAL PERFORMANCE TEST / Wheel Loader Test SERVICE BRAKE FUNCTION CHECK Summary: 1. The overall performance of the service brake is judged. 2. The braking capability of the brake is an item of safety control. Conduct the performance test correctly. Preparation: 1. Adjust air pressure of the tires evenly in advance. Air pressure: 325 kPa (3.25 kgf/cm 2 , 46.2 psi) 2. On a paved dry ground, prepare a 350 m (1148 ft) straight travel course (a 300 m (984 ft) of accel- eration/deceleration zone and a 50 m (164 ft) of measurement road), and set the brake starting point. 3. Empty the bucket, and hold the lift arm afloat 0.4 to 0.5 m (1 ft 4 in to 1 ft 8 in) above the ground. 4.
Keep hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). Warm the axle oil by repeating travel and brake operations. Warm up the engine so that the needle of the in- dicators of the engine coolant temperature gauge and the torque converter oil temperature gauge rise above the horizontal positions. Measurement: Evaluation: Refer to Performance Standard Table in Group T4-2. Remedy: Refer to Trouble Shooting in Section T5. 0.4 to 0.5 m (1’4” to 1’8”) Stopping Distance Stopping Point Brake Starting Point T4GB-04-04-002 CAUTION: Avoid measurement during travel reverse operation for dangers. (FNR lever: F) 1. Measurement for high-speed mode. 2. Select the switches as follows. 3.
Put the FNR lever at the F (Forward) position. From the acceleration zone, travel at 35 km/h (22 mph) by depression the accelerator pedal to the stroke end. 4. Depress the brake pedal at the brake starting point, and completely stop the vehicle. (Right Service Brake Pedal) 5. Measure the distance from the brake starting point to the point where the front tire is contacting. 6. Repeat measurement three times and calculate the average values. T4-4-2 Shift Switch Parking Brake Switch Accelerator Pedal Travel Mode Switch Work Mode Switch Clutch Cut Position Switch Speed 4 OFF Full depres- sion H N OFF