Hydrostatic Driving Road Sweeper Tandem Hydraulic Pumps 35mpa Variable Piston Pump

Product Description

Road roller machine tandem hydraulic pumps connect additional pumps

Tandem hydraulic pumps basic information: 

We could produce tandem hydraulic pumps, treble pump and quadruple pump.

Our tandem hydraulic pumps are axial piston variable displacement pumps, and have swash plate structure design, and are intended for closed circuit hydraulic system applications. The flow rate is proportional to the pump input speed and displacement. The latter is infinitely adjustable between zero and maximum displacement. Flow direction is reversed by tilting the swash plate to the opposite side of the neutral (zero displacement) position.

Tandem hydraulic pumps main features:

Variable displacement axial piston pumps

Swash plate structure design

Closed circuit hydraulic system applications

Wide range of displacement

CW or CCW, left or right rotation direction

Compact structure

High efficiency, high pressure

Multiple control modes

Hydraulic usage of tandem hydraulic pumps:

Tandem hydraulic pump is generally used in hydraulic transmission system, especially widely used in high-power hydraulic transmission system, such as construction machinery, agricultural machinery equipment, coal mining industry, oil exploration, aerospace industry and shipbuilding industry.

Highland company service: 

Quality service

One to one service, can provide design and installation solutions;

Online service for quick response and consultation;

Solve difficult after-sales problems;

Lightning supply

Regular single product supply for immediate delivery, batch can be quickly shipped according to customer demand;

Commitment to warranty hydraulic pump and hydraulic motor within one year;

Provide personalized and customized services according to customer needs;

Hydraulic oil notice of tandem hydraulic pumps:

The service life of tandem pump is related to the usual maintenance, the quantity and quality of the hydraulic oil, and the cleanliness of the oil. It is also an effective way to prolong the life of the piston pump to avoid the wear and tear of the friction pair of the piston pump caused by the particles in the oil. The higher the cleanliness of the hydraulic oil, the longer the service life of the hydraulic pump.

Factory Performance Testing

Each tandem hydraulic pump in the HPV70 series is supported by a documented closed-loop hydraulic pump performance test record.

The supplied report lists the component as HPV70-MA-R-21, rated 70 mL/rev, and dates the test to September 14, 2026 at 26.8°C.

Documented values include operating speed, pressure, flow, displacement, torque, input power, output power, overall efficiency and volumetric efficiency, across pressure points from approximately 5 MPa to 30.6 MPa.

Recorded Test Data

The following performance values are transcribed from the supplied closed-loop hydraulic pump test report for HPV70-MA-R-21.

Test Conditions

• Test Date: September 14, 2026
• Test Temperature: 26.8°C
• Rated Displacement: 70 mL/rev
• Rated Pressure: 35 MPa
• Maximum Pressure: 42 MPa
• Charge Pressure: 1.6 MPa
• Charge Flow: 21.9 L/min

The data above reflects the documented factory test conditions; actual operating results may vary with hydraulic circuit configuration, fluid conditions, temperature and application conditions.

Engineering Drawing

HPV70 Engineering Drawing & Technical Documentation

The HPV70-MA-R-21 is supported by engineering documentation covering dimensional integration and hydraulic configuration.

From the supplied engineering drawing, the control handle, maximum and zero displacement positions, hydraulic ports, leakage ports, oil suction port and pressure test point are identified, along with the shaft spline and control-handle information required for mechanical integration.

Engineering Information Covered

• Overall mounting and dimensional information
• Control handle geometry
• Maximum displacement position
• Zero displacement position
• High-pressure ports A and B
• Leakage ports L1 and L2
• Oil suction port S
• Pressure test port M
• Servo cylinder pressure test point
• Input shaft spline configuration
• Control-handle spline information
• Pump rotation direction
• Control configuration information

Also documented are the MA, EP and HS control configurations for the HPV series, along with the clockwise and counterclockwise rotation configurations.

Engineering Integration

Before integrating the pump into a system, the selected displacement, control method, rotation direction, shaft configuration and hydraulic port arrangement should be reviewed against the applicable engineering drawing and the application requirements.

Project Reference

Documented Project Reference — Kyrgyzstan Cotton Harvester

The supplied project documentation records the HPV70-MA-R-21 in a variable piston pump project for Kyrgyzstan.

Project Details

The documented project specification describes the HPV70 hydraulic pump with a maximum displacement of 70 mL/rev, a rated working pressure of 35 MPa, a continuous working pressure of 30 MPa and a transient maximum working pressure of 42 MPa.

This project reference is shared as documented application information from the supplied project materials.

Technical Documents

HPV70-MA-R-21 Technical Documents

Technical documentation is available to support product evaluation, hydraulic system integration and model selection.

Available Technical Information

• HPV70-MA-R-21 Technical Parameters
  Product operating parameters including displacement, speed, pressure, torque, power, temperature and weight.
• HPV70/90 Engineering Drawing
  Dimensional and configuration information covering mounting dimensions, hydraulic ports, leakage ports, shaft configuration, control handle and rotation direction.
• HPV70-MA-R-21 Factory Test Report
  Documented closed-loop performance test data including speed, pressure, flow, displacement, torque, input power, output power, overall efficiency and volumetric efficiency.
• HPV Series Technical Parameter Sheet
  Series-level technical information covering displacement classes, operating speed, pressure, torque, power, temperature and model configuration.

Technical Information Request

For OEM and hydraulic system integration projects, technical information can be reviewed according to the required displacement, operating pressure, speed, control method, rotation direction and mounting configuration.

FAQ of hydraulic tandem pumps: 

Q1: Could I have a sample order?

A: Yes, we welcome sample order to test and check quality.

Q2: How do you ship the goods and how long does it take to arrive?

A: Ship by air express, it takes 3-5 days to arrive. Airline and sea shipping also optional.

Q3: Do you offer guarantee for the products?

A: Each motor or pump should be tested before shipping, test report can be sent if requested.

Warranty 12 months after shipment for complete assembly.

Q4: What are the payment terms?

A: Full order: 30% as deposit, balance before shipment. Small order/sample order: Full advance payment.

Q5: Are you manufacturer?

A: We are a manufacturer with own plant and 20 years experiences, manufacturing agricultural hydraulic pumps motors.

Tags: tandem hydraulic pumps, treble hydraulic pumps, quadruple pump