Rubber Tired Rough Terrain Crane Tandem Hydraulic Pumps Hydraulic General Components

Product Description

 Highland Mining ditchers tandem hydraulic pumps components of general

Highland Tandem hydraulic pumps basic information: 

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

Highland 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.

Highland 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:

Hydraulic tandem pumps are mainly used in construction machinery, agricultural machinery equipment, coal mining industry, oil exploration, aerospace industry and shipbuilding industry.

a. Tandem pumps are widely used in high-pressure, high-flow, high-power systems and occasions where the flow needs to be adjusted, such as agricultural machinery, construction machinery, mining and metallurgical machinery, and ships. It can play an important role.

b. Tandem pumps are used in petroleum exploration and development, petrochemical, pharmaceutical, atomic energy science, environmental science, process equipment, experimental equipment, etc.

Highland company service: 

Highland is a technology-led production-oriented enterprise. With its reputation for high-quality and cost-effective products, it has won many favors at home and abroad. Meantime Highland owns a production base of 10,000 square meters, independent research and development, and advanced equipment for production and testing.

Factory direct sale and factory price

Warranty 1 year for hydraulic pumps motors

Excellent after-sales service

Strict quality control system

Each pump motor 100% test before shipment

More than 20 patent certificates

20 years experience in hydraulic industry

Hydraulic oil notice of Highland tandem hydraulic pumps:

The service life of tandem hydrualic 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.

Application / Project Evidence

Variable Piston Pump Project for Concrete Mixer Trucks

The HPV50-MA-R-21 is documented in a hydraulic pump project for a concrete mixer truck application in Malaysia.

Project details:

• Project: Variable Piston Pump for Malaysia
• Manufacturer: Shandong Highland Hydraulic Seiko Co., Ltd.
• Pump model: HPV50-MA-R-21
• Quantity: 50 units
• Application: Concrete Mixer Trucks
• Hydraulic circuit: Closed Circuit Hydraulic System
• Max. displacement: 50 mL/rev
• Rated working pressure: 35 MPa
• Max. transient pressure: 42 MPa
• Continuous working pressure: 30 MPa
• Max. continuous working speed: 3500 r/min

Supporting the project documentation are product technical parameters, engineering drawings and a factory performance test report for the HPV50-MA-R-21.

This project reference demonstrates the documented application of the HPV50 series in concrete mixer truck equipment, and provides application-specific technical evidence for customers evaluating the pump for similar hydraulic systems.

Factory Performance Testing

The HPV50-MA-R-21 closed-loop axial piston pump is performance-tested before shipment to verify key operating characteristics under controlled test conditions.

For this HPV50-MA-R-21 unit, the factory test was conducted on September 14, 2026 at a test temperature of 31.4°C. The tested pump had a rated displacement of 50 mL/rev, a rated pressure of 35 MPa and a maximum pressure of 42 MPa.

The recorded test procedure included pump speed, outlet pressure, flow rate, displacement, input torque, input power, output power, overall efficiency and volumetric efficiency. The test report identifies the component model as HPV50-MA-R-21 and includes a unique component number for traceability.

Factory performance testing provides application engineers and customers with product-specific operating data rather than relying only on nominal catalog specifications.

Recorded Test Data

The following data were recorded during factory performance testing of the HPV50-MA-R-21 hydraulic pump.

Test conditions:

• Test temperature: 31.4°C
• Rated displacement: 50 mL/rev
• Rated pressure: 35 MPa
• Maximum pressure: 42 MPa
• Maximum speed: 3500 r/min
• Charge pressure: 1.6 MPa
• Charge flow: 12.4 L/min

The recorded values are from the factory test report for HPV50-MA-R-21, component No. 02609140203023.

Engineering Drawing

Detailed engineering drawings are available for the HPV50-MA-R-21 closed-loop axial piston pump.

The engineering drawing provides dimensional and interface information required for system integration, including overall mounting dimensions, shaft and spline specifications, hydraulic ports, leakage ports, pressure test ports, control-handle dimensions and control positions.

The drawing also identifies the pump rotation direction and corresponding pressure-port configuration for clockwise and counterclockwise operation.

Key interface information includes:

• Product model: HPV50-MA-R-21
• Rated displacement: 50 mL/rev
• Main ports: A and B
• Leakage ports: L1 and L2
• Oil suction port: S
• Pressure/test port: M
• Control options: Manual / Electric Proportional Servo / Hydraulic Servo
• Input shaft spline configurations according to the selected model
• SAE-related control and shaft dimensions

Engineering drawings can be used by hydraulic system designers to verify mounting, shaft connection, port configuration and installation requirements before ordering.

Quality Control & Inspection

Quality control of the HPV50-MA-R-21 verifies product configuration, dimensional requirements and hydraulic performance prior to shipment.

For the unit tested, the factory record identifies manufacturer, component model, component number, rated displacement, rated pressure, maximum pressure and test temperature. Performance inspection comprises operating speed, pressure, flow, displacement, input torque, input power, output power, overall efficiency and volumetric efficiency.

Engineering documentation additionally supplies dimensional and interface information for the pump body, hydraulic ports, leakage ports, shaft spline and control mechanism.

The result is traceable technical evidence for the supplied hydraulic pump, combining configuration records, engineering documentation and recorded performance data.

Technical Documents

Technical documentation is available to support product evaluation, hydraulic system design and installation planning for the HPV50-MA-R-21.

Available technical information includes:

• HPV50-MA-R-21 Technical Parameters
• Factory Performance Test Report
• Engineering Drawing
• Mounting and Overall Dimensions
• Hydraulic Port Configuration
• Input Shaft and Spline Specifications
• Control Handle and Servo Control Information
• Rotation Direction Configuration
• HPV Series Technical Parameter Table
• Model Selection Information

The HPV50-MA-R-21 technical documentation specifies a maximum displacement of 50 mL/rev, rated working pressure of 35 MPa, maximum transient working pressure of 42 MPa, continuous working pressure of 30 MPa and a minimum continuous operating speed of 500 r/min.

For engineering evaluation, customers can request the applicable technical documents and product-specific test information from Highland.

Engineering Team

Engineering support for hydraulic pump selection, configuration and system integration is available from Highland.

For the HPV series, that support may cover displacement selection, pressure and speed requirements, control configuration, rotation direction, shaft and mounting interfaces, hydraulic port configuration and application-specific requirements.

The engineering documentation available for the HPV50-MA-R-21 defines pump displacement, operating pressure, speed range, torque and power characteristics, control options, shaft spline information, port configuration and installation dimensions.

Customers may provide their machine operating conditions and hydraulic system requirements to receive technical guidance on the appropriate HPV series configuration.

FAQ of Highland 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, closed circuit hydraulic system, hydraulic system