Spare parts, diagnostics, workshop equipment, workshop concepts

Precise Measuring Technology, Fully Automated Operation New ACS Air Conditioning Servicing Equipment from Bosch for Professional Servicing using the R134a Refrigerant

  • Precision scales offering the highest levels of accuracy for exact refrigerant metering results
  • Hybrid oil function for safe air conditioning servicing on hybrid and electric vehicles
  • Top-of-the-range ACS 751 certified to US standard SAE J-2788
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  • September 11, 2012
  • Spare parts, diagnostics, workshop equipment, workshop concepts
  • Press releases
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press release

Air conditioning systems have become established as part of the standard equipment in all vehicle categories, from economy cars through to heavy trucks. Almost all air conditioning systems fitted in modern vehicles still operate with the R134a refrigerant. Even with the introduction of the new R1234yf refrigerant, it will still be some time before any real changes are seen, as vehicle manufacturers can continue to supply new cars that use the conventional refrigerant up until 2016. Servicing air conditioning systems with the R134a refrigerant will therefore be part of the everyday work in vehicle workshops for many years to come.

That is why Bosch has updated its range of air conditioning servicing equipment for units that use the R134a refrigerant. Thanks to their high-precision measuring technology and ease of use, the new ACS 751 and ACS 651 servicing units enable repair shops to perform air conditioning servicing tasks in a cost-effective and environmentally friendly manner. Both devices operate fully automatically, allowing associates in the repair shop to carry out other work at the same time as the air conditioning system is being serviced. The status display, which can be read even from a distance, provides them with ongoing information about the test sequence using both optical and acoustic signals.

Precision Technology and Practical Equipment Information
As refrigerant has become significantly more expensive in recent years, the workshop saves money if it is able to recapture as much of the refrigerant as possible from the refrigerant circuit and then use it to refill the air conditioner precisely. Modern air conditioners also need less refrigerant, so determining the precise filling quantities has also become more important. For this reason, both new air conditioning servicing units from Bosch feature vibration-resistant precision scales that offer the highest levels of accuracy to ensure exact metering and filling results, thereby ensuring that almost all of the refrigerant can be recaptured.

The ACS 751 and ACS 651 are also ready for the growing number of hybrid and electric vehicles. Compressor oils with lower electrical conductivity are used in the electric compressors for air conditioners in hybrid and electric vehicles. These special oils must not be mixed with the standard oils used in conventional belt-driven compressors. The hybrid oil function of the devices ensures that mix-ups are impossible and that the correct type of clean oil is fed into the refrigeration circuit.

Two Variants for an Array of Repair Shop Requirements
The top-of-the-range ACS 751 satisfies all the requirements of the stringent US standard SAE J-2788 for air conditioning servicing equipment and is certified accordingly. As such, it can also be approved for brand contracted repair shops. The full spec versions of the Bosch ACS 751 and ACS 651 can be used to perform all servicing and repair work on air conditioning systems in passenger and commercial vehicles. All work steps are fully automatic without further intervention on the part of the operator – from refrigerant suction and leakage testing right through to precision filling. However, it is also possible to select the individual steps of the servicing process manually.

Four integrated weighing devices for old oil, fresh oil, contrast medium and refrigerant ensure accurate filling quantities. The target values for passenger and commercial vehicles are stored in the integrated database. What's more, the user can also create a custom database. The control device for the new air conditioning servicing equipment boasts a 3.5-inch color display and a large, user-friendly keyboard, and can easily be folded away for compact transportation. A maneuverable trolley with easily accessible service panels enables the device to be used anywhere in the repair shop and facilitates straightforward servicing.

The Automotive Aftermarket division (AA) provides the aftermarket and repair shops worldwide with a complete range of diagnostic and repair shop equipment and a wide range of spare parts – from new and exchange parts to repair solutions – for passenger cars and commercial vehicles. Its product portfolio includes products made as Bosch original equipment, as well as aftermarket products and services developed and manufactured in-house. More than 18,000 associates in 150 countries, as well as a global logistics network, ensure that some 650,000 different spare parts reach customers quickly and on time. In its “Automotive Service Solutions” operations, AA supplies testing and repair-shop technology, diagnostic software, service training, and information services. In addition, the division is responsible for the “Bosch Service” repair-shop franchise, one of the world’s largest independent chains of repair-shops, with some 17,000 workshops. In addition, AA is responsible for more than 1,000 “AutoCrew” partners.

Additional information can be accessed at

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Further information is available online at and,

PI7890 - September 11, 2012

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