A4VG125DA2D2 tandem with A10VG63EP2D1 and A10VO45DFR1
3 week ago
Product details
A4VG125DA2D2 tandem with A10VG63EP2D1 and A10VO45DFR1
Overall Structure Description
This is a triple tandem axial piston pump unit with a common through-drive shaft. The primary unit is the closed-circuit variable main pump A4VG125DA2D2, with two auxiliary pumps A10VG63EP2D1 and A10VO45DFR1 sequentially mounted in tandem on its rear through shaft. All pumps are driven by a single input drive shaft. It is widely applied in heavy-duty road rollers, concrete mixer truck chassis, motor graders and heavy construction machinery chassis to supply integrated hydraulic power for travel and working systems.
1. Primary Main Pump: A4VG125DA2D2 (Closed-Circuit Travel Main Pump)
Model Code Breakdown
1. A4VG: 4th-generation axial piston variable pump dedicated to closed hydraulic circuits from Rexroth; standard for travel drive systems, equipped with an integrated charge pump, flushing valve and relief valve, matching wheel or crawler hydraulic motors for closed-loop transmission.
2. 125: Nominal displacement of 125 cc/rev.
3. DA: Hydraulic bi-directional servo displacement control (DA speed-sensing automatic control). It adjusts pump displacement automatically based on engine rotating speed — higher engine speed delivers larger displacement, realizing automatic travel speed regulation, a classic configuration for construction machinery travel systems.
4. 2: 2nd structural generation version.
5. D2: Configuration code for mounting flange, shaft extension and port layout; fitted with SAE standard flange and involute splined through shaft for rear tandem mounting, with standard NBR seals compatible with mineral hydraulic oil.
Key Parameters & Application
- Rated continuous working pressure: 350 bar, peak instantaneous pressure: 400 bar; pre-installed with built-in charge pump and cooling flushing circuit.
- Function: Serves as the closed-circuit main pump for vehicle travel drive, powering wheel or crawler hydraulic motors.
2. Tandem Secondary Pump: A10VG63EP2D1 (Variable Auxiliary Pump)
Model Code Breakdown
1. A10VG: Heavy-duty variable piston pump of the A10V series; the suffix G denotes a reinforced housing for construction machinery and tandem installation adaptation.
2. 63: Nominal displacement of 63 cc/rev.
3. EP: Electric proportional displacement control; infinite adjustment of output flow via electric signals, designed for electronically controlled hydraulic systems.
4. 2: Structural series number.
5. D1: Configuration for mounting, port layout and sealing; side-mounted oil ports with standard tandem docking housing.
Application
Supplies hydraulic oil for electronically controlled hydraulic branches including steering systems, brake hydraulics, proportional cylinder actuators and cooling fan motors.
3. Tandem Tertiary Pump: A10VO45DFR1 (Constant Pressure Variable Open-Circuit Pump; your input A10V045 is a typo, the correct character is letter O)
Model Code Breakdown
1. A10VO: Standard axial piston variable pump for open hydraulic circuits.
2. 45: Nominal displacement of 45 cc/rev.
3. DFR: Combined control of high-pressure cut-off, constant pressure and flow regulation
- D: High-pressure cut-off for overload protection
- F: Constant pressure control to maintain stable preset system pressure
- R: External remote pressure adjustment port
4. 1: Structural generation version.
Application
Provides main hydraulic supply for working attachments such as winches and lifting cylinders, as well as auxiliary working oil circuits, ideal for constant pressure holding operations.
General Introduction of the Whole Tandem Assembly (Commercial Technical Version)
This is a Rexroth triple tandem pump unit driven by a shared input shaft. It consists of the closed-circuit travel main pump A4VG125DA2D2, tandem-fitted with an electrically proportional variable auxiliary pump A10VG63EP2D1 and a pressure-compensated variable auxiliary pump A10VO45DFR1 for auxiliary hydraulic circuits. All three pumps draw power from the same engine or transfer case input.
Typical Application Scenarios of the Complete Assembly
1. Full hydraulic assembly for heavy single-drum / double-drum road rollers (integrated triple pump for closed-circuit travel, steering and vibration hydraulic systems)
2. Integrated hydraulic pump set for upper equipment and chassis of concrete mixer trucks
3. Heavy-duty motor graders, scrapers and special engineering vehicle integrated hydraulic power units
4. Integrated oil supply systems for small mining tunneling equipment
Summary of Core Differences
1. A4VG125DA2D2: Closed-circuit travel main pump with DA speed-sensing control
2. A10VG63EP2D1: Electric proportional variable auxiliary pump
3. A10VO45DFR1: Hydraulically controlled constant pressure auxiliary pump with pressure cut-off function
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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4 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch,
hydraulic system