9) 9) CONTROL LEVER OPERATING FORCE CONTROL LEVER OPERATING FORCE (1) Use a spring scale to measure the maximum resistance of each control lever at the middle of the grip. (2) (2) ① Preparation Preparation Keep the hydraulic oil temperature at 50 ± 5 C. (3) (3) ① ② Measurement Measurement Start the engine. Operate each boom, arm, bucket and swing lever at full stroke and measure the maximum operating force for each. Repeat steps ② three times and calculate the average values. ③ (4) (4) Evaluation Evaluation The measured operating force should be within the following specifications. Unit :
kgf 6-12 Model Kind of lever Standard Maximum allowable Remarks R60WVS RRO Boom lever 1.4 or below 1.9 Arm lever 1.4 or below 1.9 Bucket lever 1.4 or below 1.9 Swing lever 1.4 or below 1.9