A4VSO71LR2/10R-VZB13N00 A4VSO71EO1/10R-PPB25N00 A4VSO71LR2/10R-PZB13N00 Mechanical Axial Piston Pumps

A1: Improper installation is a top cause of early wear -- follow these strict guidelines:

• Coaxiality Alignment: Use a flexible coupling (Rexroth KTR-ROTEX 38) and ensure radial misalignment ≤0.05 mm, axial misalignment ≤0.1 mm. Use a dial indicator for measurement; misalignment exceeding 0.1 mm will damage bearings within 500 operating hours.
• Mounting Flange Torque: Tighten DIN 24336 flange bolts to 75 N·m in a crisscross pattern (follow VDI 2230 standards). Over-tightening will deform the flange; under-tightening causes oil leakage.
• Suction Line Design:
  • Suction hose inner diameter ≥32 mm (avoid narrow pipes to prevent cavitation)
  • Suction height ≤500 mm (distance from oil level to pump centerline)
  • Install a 100 μm suction strainer with a pressure drop ≤0.5 bar
• Case Drain Line Mandates:
  • Use DN20 smooth-bore hose; no valves or reducers allowed (back pressure ≤2 bar)
  • Directly connect to the tank above the oil level to avoid oil retention in the pump housing
• Vibration Isolation: Install anti-vibration pads (rubber, 10 mm thick) under the pump base for mobile machinery applications (e.g., cranes, loaders) to reduce shock impact.

A2: Follow this sequence to ensure safe and efficient startup (critical for breaking in new components)