Oil changes in wind turbines

High-performance gearboxes have to withstand what must be the heaviest loads of all components in a modern wind turbine. We have become one of the most experienced service suppliers of this type on the market after around twenty years of experience and more than eighteen thousand oil changes.

You will especially benefit from our technology and certified procedures designed and further developed specifically for this purpose. We provide our services in Germany and several other European countries.

"Regular oil changes – safe and efficient with the shortest downtime periods"

Our services at a glance

Consultation and planning 
  • Scheduling
  • Specialist consultation 
Waste oil suction
  • Planetary gearboxes
  • Oil sumps and baffles
  • Pockets inside the gearbox
  • Additional drain points without valves
  • Professional flushing in soiled gearboxes
  • Cooler, pipe and hose flushing
Filter changes
  • Changing the main stream, side-stream and air filters
  • Any additional filters Cleaning sight glasses
  • Dismantling, cleaning and installing oil-level sight glasses 
  • Fine oil filtration according to DIN ISO 4406 on request before refilling
  • Traceability – our inventory management system tracks the whereabouts of any oil or coolant batch
Transport and disposal
  • Oil transport in original manufacturers' containers in a heated box truck
  • Oil disposal with waste approval 
Inspection and documentation
  • Magnetic plug inspection
  • Metal residue collection and transfer to customer
  • Complete documentation on all activities
  • Compilation of a service report


Does C&D perform oil changes on any type of wind turbine?

So far, we have changed the gearbox oil on the following wind turbines:

NEG Micon 
Vestas V39-V126
Nordex N50-117, Südwind 70, 77
Jacobs 500, 600, 750, HSW 1000
Senvion MD 70, MD 77, MM 70, MM 82/92, 3. X , 5 M, 6 M
Siemens/AN Bonus 600, 1.3, 2.3, 3.0, 3.6
Tacke TW 500, 600, 600 a, GE 1.5, GE 1.6, GE 2.5, GE 3.2
Gamesa 52, 58, 80, 87, 90
Fuhrländer 70, 77, 1000, 1500
Eno 82, 92
Alstom Eco 74, 80, 100
DeWind D4, D6, D8 

So far, we have changed the hydraulic oil on the following wind turbines:

NEG Micon NM 72 C/82 C
Vestas V52-V126
Siemens/AN Bonus 600, 1.3, 2.3, 3.0, 3.6
ENO 82, 92
Gamesa 52, 58, 80, 87, 90
HSW 1000
DeWind D4, D6, D8

Ask us if your wind turbine is not listed here. We are positive that we will find a solution for you.

How much downtime does an oil change need?

This depends on your system, and the services you commission us with. An oil change usually takes around two to three hours for a standard wind farm model such as a V80, MD70, MD77, or GE1.5. Our advanced technology, specially trained staff and many years of experience will, of course, save you valuable time compared to a manual oil change.

How much time elapses between order confirmation and the actual oil change?

We will usually not charge you for travel costs to and from your wind turbine as we aim to work efficiently and combine as many oil changes at as many different customers as possible in one tour. We will usually deliver the service four to eight weeks after you place the order. Call us and arrange a fixed date with us if you require our services sooner; we will then charge you for travel costs.

Do we need to provide service staff on site during the oil change?

We will not require your service staff to be present in order to perform common gearbox and hydraulic oil changes as long as we have access to your wind turbine. We will inform you before submitting an offer if we might be needing your service staff for more unusual wind turbines or services.

Can we provide the oil or filter elements?

We always provide a complete package of services, logistics and oil filter elements, so we cannot guarantee our oil service for oil products not provided by us. And: from our experience, a complete package costs less than the additional costs of provisioning by customers due to additional cost factors such as handling and shipping.

Can you recommend gearbox or transmission oil products?

No. We operate as an independent service provider, and need to take the gearbox manufacturer's official specifications and approved materials into account for each wind turbine.

How often do gearbox and hydraulic oil need to be changed?

Please refer to the corresponding maintenance and service contract with your equipment manufacturer, as these usually include the exact change intervals required. It is especially important to make sure that the maintenance intervals are actually kept to as specified. For an oil change according to analysis, you will need to check whether the oil is still in good working condition, or whether it is impaired due to deposits in the gearbox; this will be difficult or impossible to solve in the long term. We at C&D also provide our expertise and qualified specialists for the purpose.

Why C&D?

  • Powerful specialised technology to ensure extremely short downtime periods while servicing wind turbines
  • Independent oil and coolant changes without immediate service provider support
  • Contamination-free oil changes
  • Execution on time
  • Fair terms and costing
  • Experience and expertise in all wind turbine types and manufacturers
  • Procurement (oil, filters)
  • Safe handling of waste oil, new oil and filters
  • Efficient scheduling and work organisation to minimise travel costs

„We are a vendor-agnostic service company, and as such, we have already completed a number of projects with C&D Ölservice in recent years. A very effective and uncomplicated service for all matters and issues in lubrication and oil changes.“

GFW GmbH & Co. KG

„WEB Windenergie AG has been benefiting from the expertise at C&D Ölservice GmbH since early 2017. We especially appreciate the independent working approach and excellent service as well as flexibility and efficiency at C&D. C&D rapidly advanced into one of our most valued partners. We consult on which of our wind turbines in Austria, Germany, France, and the Czech Republic are due for an oil change during the year, and C&D takes on the complete project from planning the oil purchase and change of the oil to professional disposal. We can thoroughly recommend C&D Ölservice from our positive experiences with them as a partner.“

WEB Windenergie AG

„We appreciate the many years of professional services throughout our working relationship with C&D Ölservice. Communication, planning, and coordination have been perfect. They know what they’re doing, they know our wind turbines and technical conditions.“

Michael Ludwig, Wind at Work GmbH