Peterbilt Expansion Valve Leak and Snap On PolarTek Machine DIY A.C. Repair EASY FIX
How to find AC leaks on a Semi truck, How to remove and replace the o rings in a leaking expansion valve and a close up look at the Snap On PolarTek A.C. Machine and how it works to recover your Freon, pull and test the vacuum on your system and also refill your A.C. to the proper level.

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