A4VSO40LR2G/10R-VZB13N00A4VSO40LR2G/10R-VPB13N00A4VSO40LR2G/10R-PPB13N00Rexroth axial mechanical piston pump imported from Germany

A20: Regular maintenance schedule (based on 8-hour daily operation):

1) Daily maintenance: Check oil level, leakage, abnormal noise, and pump body temperature;

2) Weekly maintenance: Clean the suction and return filters, check the pressure gauge for accuracy, and tighten loose bolts;

3) Monthly maintenance: Sample the hydraulic oil for cleanliness and water content testing, inspect the shaft seal for oil seepage, and lubricate the coupling;

4) Quarterly maintenance: Disassemble the control valve (PZB13) for cleaning, check the swashplate wear, and test the load-sensing response;

5) Half-year maintenance: Replace the hydraulic oil and all filters, check the piston-cylinder pair clearance (should be ≤0.02 mm);

6) Annual maintenance: Complete disassembly of the pump, replace worn parts (bearings, seals, valve plates), and calibrate the control system.

A21: Oil and filter replacement steps:

1) Preparations: Heat the hydraulic oil to 40-50℃ (to improve fluidity), prepare new oil, filters, and tools;

2) Drain the old oil: Open the oil tank drain valve, drain all old oil, and clean the oil tank with a lint-free cloth (avoid rags);

3) Replace the filters: Replace the suction filter, return filter, and pressure filter elements (use Rexroth original filters);

4) Add new oil: Use a filter cart (filtration accuracy 3 μm) to inject new oil into the tank to the upper scale;

5) Circulate and exhaust: Start the pump at low speed for 10 minutes, open the system vent valve to exhaust;

6) Check: After stopping, check the oil level (make up if insufficient) and the filter pressure difference (should be ≤0.1 MPa).