SYSTEM PRESSURE REGULATOR RELIEF SETTING SYSTEM PRESSURE REGULATOR RELIEF SETTING 15) 15) (1) (1) ① ② Preparation Preparation Stop the engine. Push the pressure release button to bleed air. To measure the system relief pressure. Install a connector and pressure gauge assembly main pump gauge port, as shown. Start the engine and check for oil leakage from the port. Keep the hydraulic oil temperature at 50 ± 5 C. ③ Screw coupling B ④ Main pump ⑤ S (2) (2) ① Measurement Measurement Slowly operate each control lever of boom, arm and bucket functions at full stroke over relief and measure the pressure.
In the swing function, place bucket against an immovable object and measure the relief pressure. In the travel function, lock undercarriage with an immovable object and measure the relief pressure. ② ③ (3) (3) Evaluation Evaluation The average measured pressure should be within the following specifications. Unit : kgf / cm 2 6-18 Model Function to be tested Standard R60WVS RRO Boom, Arm, Bucket 260±10 Travel 230±10 Swing 230±10