R902193366 A2FO10/61R-PBB06 German Rexroth piston pump

Frequently Asked Questions (FAQ)

Q1: Is this a variable or fixed displacement pump?

A:​ This is a fixed displacement​ pump. The output flow is determined solely by the drive speed and the fixed 10 cm³/rev displacement. It cannot vary its displacement like a A2FE or A10VSO variable pump.

Q2: What does the "61R-PBB06" suffix mean?

A:​ This code defines the configuration:

• 6: Series 6.

• 1R: Right-hand rotation (viewed from shaft end).

• P: Standard seals (NBR for mineral oil).

• BB: Port configuration (S and B ports on same side, SAE flange).

• 06: Port size code 06 (metric threads).

Q3: What is the maximum system pressure I can run?

A:​ The pump is rated for a continuous nominal pressure of 400 bar. It can handle short-term peak pressures up to 450 bar, but the total duration of peak pressure operation should not exceed the design limits for bearing life.

Q4: Does this pump require a case drain line?

A:​ Yes.​ The "L" port is a case drain and must be connected directly to the tank​ with minimal backpressure (max 2 bar). This is critical to prevent shaft seal failure by relieving internal case pressure from internal leakage.

Q5: Can I use this pump in a closed-loop hydrostatic transmission?

A:​ No.​ The A2FO is designed for open circuits​ (pump → valve → actuator → tank). For closed-loop applications (where the pump outlet is directly connected to a motor inlet), you would need an A2FM series motor or a dedicated closed-loop pump like an A4VG.