Case CX160B, CX180B Crawler Excavator Repair Manual

Type: Excavator and Schematic Set Excavator
Manuals: Service Manual
General Information
Engine
Fuel System
Electrical System
Undercarriage
Drive Train
Undercarriage Hydraulics
Upper structure Hydraulics
Upper structure
Manual Extract: Flow measurement
1. When measuring the flow, position the workers as in the figure below.
Worker 1: Work supervisor, pressure adjustment • Worker 2: Operator
Worker 3: Flow, pressure measurement, recording
3. Check the hydraulic oil temperature on the monitor (50°C, 122°F). Check that the engine rotation and pump current are normal.
4. The operator signals the arm-out relief operation to worker 1.
5. Worker 2 lowers the arm-out port relief. (Min: 24 MPa (240 bar, 3481 Psi) (P1 + P2)
6. Start of flow measurement.
7. The arm-out relief operation is carried out.
8. Data measured in units of 2.0 MPa (20 bar, 290Psi) (P1 + P2).
The measurement is carried out from 24.0 to 76.0 MPa (240 to 760 bar, 3481 to 11023 Psi) and ends when the maximum pressure is reached.
9. Remove the flow meters.
Because from 40 MPa (400 bar, 5802 Psi) the pressure exceeds the permitted value for the flow meter pressure gauge maximum pressure.
10. Reset the arm-in port relief valve to normal pressure.
(For details on this adjustment, see “PRESSURE ADJUSTMENT”.)
11. Remove the pressure gauges etc. and put everything back to normal.