Conversion of A/C system form R12 to R134a Retrofit:
Page 3
The method described below is for installing Basic kit PN 9145660-8.
This is, in principle, the basic method for installing Basic PN 9145661-1
or supplementary kits according to the first two pages.
Empty refrigerant from System
This MUST be done by a licensed AC technician. The free release of freon
R12 is a federal offense. Most places should do this for a small fee. This
also helps remove the oil and the freon trapped in the oil that could cause
problems later on because of the incompatibility between the two type of
freon.
A1
Remove:
Battery negative cable
Receiver
A2
Use rust inhibitor PN 1161422-9 on all screw joints which are to be
detached
Allow the inhibitor several minutes to work before undoing screwed
joints.
NEVER USE EXCESSIVE FORCE
Note: Under no circumstances use heat when removing
I didn't do this step and all went fine. I would say this is precautionary
but not fully necessary
A3
Detach:
ETF/KRU valve bracket. Remove circlip and valve (where installed)
pipe connections at the receiver inlet and outlet. Be sure to use two
wrenches when undoing connections so not to twist lightweight metal.
the pressostat connector. Remove pressostat: this will be reused. This
is the low pressure cutoff switch. If defective you can purchase one
at the local parts store for about $12.
Existing O rings (note sizes) Replace with new rings from kit on new equipment.
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