OPERATIONAL PERFORMANCE TEST / Component Test Measurement: 1. Maintain the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F) 2. Measure pump flow rate in response to the ex- ternal command pilot pressure. 3. Select each switch position as follows: Engine Control Dial Work Mode Evaluation: 1. Convert the measured flow rates to those at the specified engine speed by using the following formulas: Qc = (Ns Ч Q) Ne Qc : Converted Flow Rate Q : Measured Flow Rate Ns : Specified Engine Speed (ZAXIS200-3: 1800 min -1 ) (ZAXIS225US-3: 1800 min -1 ) (ZAXIS225USR-3: 1800 min -1 ) (ZAXIS240-3: 1900 min -1 ) (ZAXIS270-3: 2000 min -1 ) Ne : Measured Engine Speed Values indicated on Dr. ZX 2.
Standard Flow Rate Refer to Operational Performance Standard in Group T4-2. Fast Idle Digging Mode 4. Adjust the pressure reducing valve set pressure to each pressure point specified along the main pump P-Q curve. (Pilot Characteristics) (Refer to T4-2-16.) Measure the flow rates and engine speeds at the pressure points specified in the P-Q curve. 5. Repeat each measurement three times and cal- culate the average values. NOTE: When actually measuring, install pipe (1) (ST 6144) or (2) (ST 6143) only to the pump to be measured. T4-5-22 Power Mode Switch Auto-Idle Switch P Mode OFF