WD Catalog 2018

12-4

Chapter 12

– Retrofitting an R-12 System

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Chapter Start - Table of C

- Index

10.

If no label exists, refer to the recovery unit for lubricant with-

drawn. Add the amount drained from the compressor and esti-

mate that which was removed from other components. Add the

type of lubricant as recommended by the vehicle or compressor

manufacturer. Charge with R-134a using the sight glass tech-

nique.

11.

Leak check with an electronic leak detector.

12.

Replace the original system’s label with one showing the retrofit

to R-134a Include the amount of refrigerant, and the amount and

type of lubricant that was added. It is a good idea to label the

unique R-134a components if they do not already carry such

identification.

Chapter Review

Retrofitting of mobile air conditioning, systems will be a major activity by 1995.

The service technician must understand the procedure, and have the necessary

equipment and a source for the new components. Understand the step by step

procedure and do not deviate from the set plan. Advise your customer of the

potential risks of using existing components.