11) 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) ① Preparation Keep the hydraulic oil temperature at 50 ± 5 C . (3) Measurement ① ② Start the engine. Select the following switch positions. · Mode selector : M mode Operate each boom, arm, bucket and swing lever at full stroke and measure the maximum operating force for each. Lower the bucket to the ground to raise one track off the ground. Operate the travel lever at full stroke and measure the maximum operating force required. When finished, lower the track and then jack-up the other track.
Repeat steps ③ and ④ three times and calculate the average values. ③ ④ ⑤ (4) The measured operating force should be within the following specifications. Evaluation Unit : kgf 7-14 Model Kind of lever Standard Maximum allowable Remarks R800LC-7A Boom lever 1.6 or below 2.0 Arm lever 1.6 or below 2.0 Bucket lever 1.6 or below 2.0 Swing lever 1.6 or below 2.0 Travel lever 2.1 or below 3.15