Service Tools

Service
Tools:
The most important requirement for R-134a service tools is a compatible recovery/recycling unit. BMW is currently evaluating units for use by BMW dealers on R-134a systems. The units feature integral gauges, electronic cycle controls, and a variety of sophisticated features.

The chemical nature of R-134a is so different than R-12, a special electronic leak detector is required to "sniff" R-134a. These units are 120 times more sensitive than R-12 devices. Some models of leak detection equipment are adjustable for both R-134a and R-12 use. In any case, make sure your leak detector is designated for use with R-134a systems, and follow the operation instructions included with the service tool.

Never use any R-12 service tool, such as manifold gauge sets, on R-134a systems. Tools retain small amounts of refrigerant and lubricant. Attempting to use the same equipment on both R-12 and R-134a vehicles will contaminate the air conditioning systems. Manifold gauge sets must be constructed of the proper hose material and fitting to be compatible with R-134a. Compatible units should be labeled appropriately.

Refer to upcoming Service Information in 04 06 92 (3522) for further information of R-134a service tools. In addition, troubleshooting and specific service information will also be published in SI 64 10 92 (3536).





OVERVIEW of SYSTEM CHANGES: R-134a