Sauer danfoss FRR074 axial piston hydraulic pump

The FRR074 is a variable displacement, open-circuit axial piston pump manufactured by Danfoss (formerly Sauer-Danfoss) as part of the Series 45 product family. <cite index="2-1">It belongs to the "F Frame" size class within that series and has a displacement of 74 cc per revolution.

How the FRR074 Works: The Axial Piston Principle

To understand why this pump is built the way it is, it helps to understand the underlying mechanism.

An axial piston pump is a positive displacement pump built around a circular array of pistons arranged within a cylinder block. In the FRR074:

1. The cylinder block rotates, driven by an input shaft aligned roughly parallel to the pistons.

2. Each piston rides against a swashplate — an angled plate whose tilt determines how far each piston travels during a single rotation.

3. As the block spins, pistons are forced in and out of their bores by the swashplate angle, drawing fluid in on one side and expelling it under pressure on the other.

4. A valve plate at one end of the cylinder block routes fluid through separate inlet and outlet ports, timed to the piston stroke.

The critical part — and the reason the FRR074 is called a variable displacement pump — is that the swashplate angle isn't fixed. In variable displacement units, this cam is movable and is commonly referred to as a swashplate, yoke, or hanger. Tilt it further, and each piston stroke moves more fluid; tilt it toward neutral, and output drops toward zero without changing the input shaft speed at all. This is what lets a single FRR074 pump adjust flow on the fly to match whatever the connected actuator or motor needs at that moment — no separate flow-control valve required upstream.

Key Specifications and Performance Characteristics

While exact configuration codes vary by control type, shaft, and porting option, the core performance envelope of the FRR074 within the Series 45 platform includes:

Displacement and Flow

74 cm³/rev nominal displacement (this is the number baked into the part name itself)

Output flow scales directly with input shaft speed and swashplate angle

Speed and Pressure Ratings

Maximum speeds up to 3,600 rpm

Continuous operating pressure up to 310 bar (4,495 psi)

Peak pressure up to 400 bar (5,800 psi) for intermittent load spikes

Control Options

Multiple control system configurations, including load-sensing and pressure-compensated variants

Manual displacement control, electric proportional control, and remote-servo options are also available, depending on the ordering code

Mechanical Features

Through-drive capability for stacking a second pump on the same input shaft in multi-circuit systems

A range of mounting flanges, shaft types, and porting configurations to simplify installation across different machine platforms

Common Applications

The FRR074's displacement class and pressure rating make it a natural fit for mid-size mobile equipment where a single pump needs to drive a demanding but not extreme hydraulic circuit. Typical applications include:

Agricultural equipment — sprayers, combines, and self-propelled implements, where load-sensing control keeps fuel use down during transport versus field work

Compact and mid-size wheel loaders — main implement circuits (boom, bucket, tilt)

Forestry machines — feller-bunchers and forwarders, where pressure spikes during cutting or grappling demand the pump's peak-pressure headroom

Construction equipment — skid steers, compact excavators, and material handlers using the pump for primary work-function circuits

For more information on the FRR074 hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1:What type of hydraulic pump is the FRR074, and what is its key design characteristic?

A1:The FRR074 is an axial piston variable displacement pump. Its key design characteristic is its compact and efficient axial piston design, which provides high power density, making it suitable for medium-power applications in a relatively small package.

Q2:What's the maximum pressure the FRR074 can handle?

A2: Up to 310 bar continuously, with peaks to 400 bar for short-duration load spikes — consult the specific datasheet for your control configuration, since peak ratings can be affected by relief valve settings.

Q3:What is the price and delivery time of the JRRS45 hydraulic pump?

A3: The specific price and delivery time will be provided based on the specific model you provide.

Q4:How to purchase an FRR074 hydraulic pump?

A4: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.