OPERATIONAL PERFORMANCE TEST / Component Test MAIN PUMP DELIVERY PRESSURE The main pump delivery pressure can also be meas- ured by using Dr. ZX. Preparation: 1. Stop the engine. 2. Push the air bleed valve on top of the hydraulic oil tank and release any remaining pressure. 3. Remove the plug of pressure check port from the main pump delivery port. Install adapter (ST 6069), hose (ST 6943) and pressure gauge (ST 6941). : 6 mm Connect Dr. ZX and select the monitoring func- tion. 4. Start the engine. Confirm that no oil leakage is observed at the pressure gauge connection. 5. Maintain the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). Measurement: 1.
Select the following switch positions: T157-05-04-005 2. Measure pressure with the control levers in neu- tral without load. 3. Repeat the measurement three times and calcu- late the average values. Evaluation: Refer to the Performance Standard Table in Group T4-2. Remedy: Refer to the Troubleshooting B in Group T5-6. T4-5-8 Engine Control Dial Power Mode Switch Auto-Idle Switch Work Mode Fast Idle P Mode OFF Digging Mode