14) FOR TRAVEL SPEED SELECTING PRESSURE (1) Preparation ① ② Stop the engine. Remove the top cover of the hydraulic tank oil supply port with a wrench. Push the pressure release button to bleed air. To measure the speed selecting pressure: Install a connector and pressure gauge assembly to turning joint P port as shown. Start the engine and check for on leakage from the adapter. Keep the hydraulic oil temperature at 50 ± 5 C . ③ D C A B ④ ⑤ Dr P ⑥ (2) Measurement ① Select the following switch positions. Travel mode switch : 1 speed 2 speed · Mode selector : M mode Measure the travel speed selecting pressure in the Hi or Lo mode.
Lower the bucket to the ground to raise the track off the ground. Operate the travel lever at full stroke and measure the fast speed pressure. Repeat steps ② and ③ three times and calculate the average values. 8007A7MS02 ② ③ ④ (3) Evaluation The average measured pressure should be within the following specifications. Unit : kgf / cm 2 7-17 Model Travel speed mode Standard M aximum allowable Remarks R800LC-7A 1 Speed 0 - 2 Speed 33±5 -