SWING PARKING BRAKE RELEASING PRESSURE 15) (1) Preparation ① ② Stop the engine. Remove the top cover of the hydraulic tank oil supply port with a wrench. The pressure release L wrench to bleed air. Install a connector and pressure gauge assembly to swing motor SH port, as shown. Start the engine and check for oil leakage from the adapter. Keep the hydraulic oil temperature at 50 ± 5 C . ③ ④ SH ⑤ ⑥ (2) Measurement ① Select the following switch positions. · Mode selector : M mode Operate the swing function or arm roll in function and measure the swing brake control pressure with the brake disengaged.
Release the control lever to return to neutral and measure the control pressure when the brake is applied. Repeat step ② three times and calculate the average values. ② 8007A7MS03 (3) The average measured pressure should be within the following specifications. Evaluation Unit : kgf / cm 2 7-18 Model Description Standard Allo wable limits Remarks R800LC-7A Brake disengaged 33 22~50 Brake applied 0 -