Service and repair of Rexroth A4VG hydraulic pumps
Diagnostics, regeneration, and test bench. Door-to-door pickup throughout Europe. Warranty up to 12 months.
- Original parts
- Dynamometer test report after repair
- Short lead times
- Technical support and replacement selection
Contact form
Typical symptoms of hydraulic pump failure
Slow machine movements
Decrease in system working speed. Working elements move slowly, response to control is delayed.
Weakness
With an increase in oil temperature. After the oil warms up, the machine loses power.
Noise
Howling, squeaking, grinding. Noise increases with load and indicates wear of components or cavitation.
Vibrations
Vibrations of the pump and pipes. Noticeable pulsations or "jerking". Often near bearings or uneven flow.
Variants and subtypes of Rexroth A4VG - all in one place
We service the entire A4VG family: single and double versions, various types of regulators and controls, with valve equipment according to OEM applications. Below is a list of supported variants:
A4VG28
- A4VG28
- A4VG28-40
- A4VG28DA14
- A4VG28DA1D3R
- A4VG28DA1D4
- A4VG28DG
- A4VG28DG1
- A4VG28DWDT1
- A4VG28EP2D1
- A4VG28HD1
- A4VG28HW1
- A4VG28MS1
- A4VG28NV
- A4VG28XX
A4VG40
- A4VG40
- A4VG40DA1D2
- A4VG40DA1D3L
- A4VG40DA1D4
- A4VG40DA1D6
- A4VG40DA1D7
- A4VG40DA1D8
- A4VG40DAD2
- A4VG40DE4DT1
- A4VG40DWDMT1
- A4VG40DWDT1
- A4VG40EP2D1
- A4VG40EP2DM1
- A4VG40EP4DT1
- A4VG40EZ1DM1
- A4VG40HWD2
A4VG56
- A4VG56
- A4VG56 DA
- A4VG56 DA1D2
- A4VG56 DA1D4
- A4VG56 DA1D8
- A4VG56 DA1DT8
- A4VG56 DWDT1
- A4VG56 EP2D1
- A4VG56 EZ1DM1
- A4VG56DA1D2
- A4VG56DA1D3
- A4VG56DA1D3L
- A4VG56DA1D4
- A4VG56DA1D7
- A4VG56DA1D8
- A4VG56DA1DT8
- A4VG56DA2D6
- A4VG56DE4DT1
- A4VG56DWDM1
- A4VG56DWDT1
- A4VG56EP2D1
- A4VG56EP2DT1
- A4VG56EP3D1
- A4VG56EP4D1
- A4VG56ET5D1
- A4VG56EZ1DM1
- A4VG56HW1
A4VG70 and A4VG71
- A4VG70
- A4VG71
- A4VG71 DA1D2
- A4VG71 DA1D3L
- A4VG71 DA1D4
- A4VG71 DA1D7
- A4VG71 DA1D8
- A4VG71 EP2D1
- A4VG71DA1D
- A4VG71DA1D2
- A4VG71DA1D3L
- A4VG71DA1D4
- A4VG71DA1D6
- A4VG71DA1D7
- A4VG71DA1D8
- A4VG71DA1DT4
- A4VG71DA1DT8
- A4VG71DA2D2
- A4VG71DA2D6
- A4VG71DA2D7
- A4VG71DA2D8
- A4VG71DAD4
- A4VG71DE4DT1
- A4VG71DWD1
- A4VG71DWDM1
- A4VG71DWDMT1
- A4VG71DWDT1
- A4VG71EP2DT1
- A4VG71EP4
- A4VG71HD3DT1
- A4VG71HDDT1
- A4VG71HWD1
- A4VG71HWDT1
A4VG90
- A4VG90
- A4VG90 DA1D2
- A4VG90 DA1D4
- A4VG90 DA1D7
- A4VG90 DA1D8
- A4VG90 DA2D2
- A4VG90 EP2DT1
- A4VG90DA1D2
- A4VG90DA1D4
- A4VG90DA1D7
- A4VG90DA1D8
- A4VG90DA1DT8
- A4VG90DA2D2
- A4VG90DA2D4
- A4VG90DA2D8
- A4VG90DA2DA2
- A4VG90DE2
- A4VG90DE2D1
- A4VG90DE2DT1
- A4VG90DE9DT1
- A4VG90DWDMT1
- A4VG90EP1DT1
- A4VG90EP2D1
- A4VG90EP2DT1
- A4VG90EZ2
- A4VG90EZ2DX
- A4VG90HD3DT1
- A4VG90HDDT1
A4VG125 and A4VG140
- A4VG125
- A4VG125 DA2D2
- A4VG125DA2D2
- A4VG125DA2D6
- A4VG125DA2DM2
- A4VG125DAD2
- A4VG125DE2D1
- A4VG125EP1D1
- A4VG125EP2D1
- A4VG125ES2D1
- A4VG125EZ2DX
- A4VG125EZDX
- A4VG140DA2D2
- A4VG140EP4DM1
- A4VG140EP4DX
Naming and equipment vary depending on the machine manufacturer. At WIBAKO, we will select the right configuration based on the serial number and nameplate.
What we do as part of the service
Diagnostics & tests
Pressure measurement, flow tests, test bench verification.
Overhaul
Replacement of rotating elements, seals, surface finishing.
Calibration
Precise adjustment of valves and controls.
Upgrades
Selection of replacements and adaptations.
Door-to-door
Pick-up and delivery throughout Poland.
Warranty & report
Test protocol and warranty up to 12 months.
Supported machine brands
Manufacturer names for information purposes only – independent service.
What the repair process looks like
Contact
By phone or via the form.
Collection
We arrange a courier; on-site disassembly possible.
Diagnostics
Disassembly, measurements, cost estimate for approval.
Repair & test
Assembly, calibration, test bench verification.
Customer reviews
Efficient diagnosis and quick tests. - Marek
A4VG125 returned to full efficiency. - Andrzej
Clear pricing, deadline met, good warranty. - Tomasz
FAQ - frequently asked questions
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#1.Hydraulic pump repair - where to start?
To start the hydraulic pump repair process, please contact our repair coordinator, Sebastian. You can call +48 33 870 42 05 or use the contact form on our website.
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#2.How to deliver a pump for repair?
You have several options:
- Deliver it personally to our workshop.
- Send it by courier.
- After agreeing on the details, we can arrange courier transport.
If you are unable to disassemble the pump, our mobile service can come to you and perform this service. -
#3.What does the repair process look like?
- Dismantling and verification: after delivering the pump to the workshop, we dismantle it into parts and thoroughly verify any damages.
- Estimate and repair time: we prepare a detailed cost estimate and determine the expected completion time.
- Repair implementation: after your acceptance of the terms, we proceed with the repair.
- Testing and painting: after the repair is completed, we test the pump at the testing station.
- A positive test result means that the pump is ready and gets painted. -
#4.What does the offer include?
Our offer may include:
- An estimate for repairs using original parts (if available).
- An estimate for repairs using replacement parts.
- A proposal to purchase the same pump after repair from our warehouse (an alternative to repairing your pump).
- An offer to purchase a new device, if the particular model is in our warehouse. -
#5.How long does the repair of a hydraulic pump take?
Verification begins immediately after the pump is delivered.
You will receive an estimate for typical repairs within just a few hours.
The repair itself usually takes 3-5 business days. -
#6.How do we test hydraulic pumps?
After installation at the test station, the pump is subjected to loads simulating operation in a construction machine. We measure key parameters such as: pressure, flow, torque and oil temperature. We also check changes in efficiency with respect to pressure and the operation of the pump over a wide range of working temperatures. The full test lasts from 4 to 8 hours, depending on the type of pump.
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#7.What is the warranty after repair?
We perform repairs, using original parts or proven substitutes. After repair, each pump is tested, and the results are documented in the form of a readable chart. Therefore, you receive a 6-month warranty for each repair. If you have any questions about installation or operation, you can use our free phone support.
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#8.Can I cancel the repair?
Yes, you can cancel the repair after receiving the estimate without incurring any costs.
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#9.How much does hydraulic pump regeneration cost?
The price depends on the type of pump and the extent of damage. If you provide us with the type of hydraulic pump, we can give you an approximate price range, based on our previous projects.
Rexroth A4VG Service
Contact us and restore full functionality to your Rexroth A4VG pump - fast diagnostics, regeneration, and quality warranty from WIBAKO.
