OPERATIONAL PERFORMANCE TEST / Wheel Loader Test Measurement: 1. Select the pedal, switches, and forward-reverse lever as follows. 2. Make measurement operation as follows. (including the buffer range) 2-1. Measurement of Lift Arm Cylinder (for Lifting) Operate the lift arm lever to the stroke end, and measure the time of movement of the lift arm from the lowest position to the highest position. 2-2. Measurement of Lift Arm Cylinder (for Lowering) Lower the bucket to the ground in the horizontal position, and lift the lift arm to the highest posi- tion. Keep the lift arm lever at the afloat position, and measure the time of movement of the bucket reaching the ground. 2-3.
Measurement of Bucket Cylinder Operate the bucket lever to the stroke end, and measure the time of movement of the bucket from the full crowd position to the full dump po- sition. 2-4. Measurement of Steering Cylinder Operate the steering wheel to the stroke end, and measure the time of movement of the steering wheel from the right to the left end, and from the left to the right end. CAUTION: Before measurement, confimr that there are no human beings or obstacles in the steering range. 3. Make measurement three times, and determine the measurement value by obtaining their mean values. Evaluation: Refer to the Performance Standard Table in Group T4-2. Remedy:
Refer to the Trouble Shooting in Section T5. T4-4-9 Accelerator Pedal Parking Brake Switch Forward-reverse Lever Work Mode Switch Lift Arm (for Lifting) Full Stroke (Engine Maximum Speed) ON N N Lift Arm (for Lowering) Neutral (Engine Minimum Speed) ON N N Bucket Full Stroke (Engine Maximum Speed) ON N N Steering Neutral (Engine Minimum Speed) OFF N N Steering Full Stroke (Engine Maximum Speed) OFF N N