A4VG140 REXROTH A4V A4VG A4VG Hydraulic Pump High Quality A4VG140EP4D132R-NAF02F021DP-S

A4VG140 Hydraulic Pump

Check charge circuit: Verify charge pump pressure (should be 280 bar continuous). If low, clean/replace the charge filter or repair the charge pump.

Inspect control system: Check the electro-hydraulic proportional valve (E-type control) for power supply or wiring issues. Use a multimeter to confirm 24V DC input.

Check for leaks: Inspect main circuit hoses and fittings—leaks reduce pressure. Tighten fittings or replace worn hoses.