PTO pumps – Hydraulic pumps with power take-off connection

A cast iron pump, as the name suggests, is made of cast iron. Our PTO pumps consist of two housing halves. The robust cast iron housing allows for high operating pressures with large displacements.

In comparison, the housing of a conventional gear pump is usually made of aluminum. The housing is three-piece and consists of a cast iron front and rear cover. Some manufacturers also use cast iron covers.

A conventional gear pump is less pressure-resistant at large displacements compared to a cast iron PTO pump.

A PTO pump is used in various hydraulic applications:

• Log splitters: Power supply for hydraulic log splitting equipment
• Agricultural applications: Various tractor-mounted implements
• Mobile hydraulic power units: Compact solutions for different uses
• Forestry: Hydraulic tools and machinery

A typical example: The PTO gearbox with mounted gear pump can be replaced by a PTO pump. The more compact design of the cast iron pump allows for a space-saving installation in your application.

The use of the correct hydraulic oil is very important in hydraulics. For a PTO pump, different hydraulic oils are suitable:

• HLP46: The most common hydraulic oil, available from various manufacturers
• Standard hydraulic oils: All commercially available mineral oils according to DIN standard
• Biodegradable hydraulic oils: Can also be used, but with limitations

Important note: For biodegradable oils, the manufacturer’s instructions must be observed, as some bio-oils may damage the seals of the PTO pump.

The cast iron housing offers several decisive advantages:

• Higher pressure resistance: Superior especially with large displacements
• Robust design: More resistant to mechanical stresses
• Durability: Longer service life even under heavy use
• Two-piece design: Simpler construction compared to three-piece aluminum housings
• Better heat dissipation: Cast iron dissipates heat better than aluminum
• More compact design: Allows for more space-saving installation

Cast iron PTO pumps are characterized by the following technical features:

• Higher operating pressures: Enabled by robust cast iron housing
• Large displacements: Efficient delivery even at high flow rates
• Two-piece housing construction: Made of two durable cast halves
• Direct PTO drive: No additional gearbox required
• Various port sizes: Adaptable to different system requirements
• Robust bearing design: Designed for high radial and axial loads

The following points must be observed during mounting and installation:

Mounting:

• Direct connection: Direct coupling with the tractor’s PTO shaft
• Secure fastening: Stable installation on the vehicle or equipment
• Alignment: Correct alignment to avoid stresses

Hydraulic connections:

• Pressure line: Connection to the hydraulic system
• Suction line: Connection to the hydraulic tank
• Sealed connections: Use of suitable seals and fittings

Commissioning:

• Bleeding: Bleed the system before commissioning
• Test run: Slowly increase the speed
• Inspection: Check for leaks and proper function

Regular maintenance is essential for a long service life:

Regular checks:

• Oil level: Regularly check the hydraulic oil level
• Oil quality: Check for contamination and aging
• Leaks: Inspect all connections and seals
• Noise: Monitor for unusual operating noises

Maintenance intervals:

• Oil change: According to manufacturer’s specifications or if contaminated
• Filter replacement: Regular replacement of hydraulic filters
• Seals: Check and replace if worn
• PTO connection: Inspect connection and lubrication

A cast iron PTO pump is particularly advantageous in the following cases:

• High operating pressures: When the system requires high pressure
• Large displacements: For high delivery volumes
• Limited space: When a compact design is required
• Intensive use: In frequent or continuous operation
• Easier maintenance: Fewer components mean less maintenance effort