Model: 626 GF
Engine Size: 2.0
Country of Origin: Denmark
I have been reading this excellent forum for a few years now and also succeeded in repairing a few systems. Some time ago I read about an interesting trick for adding oil:
1) Hook pump up to yellow hose, hook blue up to the low side, and hook red up to the high side.
2) Close the low side valve so vacuum only being pulled on the high side.
3) Unhook the blue hose from the gauge, not from the vehicle. Now the blue hose can be used to pull in the oil.
When I unook the blue hose from the gauge will the system not be filled with air immediately or should I use a hose with a ball valve?
We use the Mastercool Oil Injectors
You can do this, but when the system is empty it's easier to just disconnect a line and pour the oil in. Oil is a lot more viscous than you might think and it takes a long time to go in trying to pull it in with vacuum. The oil injector can also be used to add oil to a charged system.
You don't care if air goes in because you're going to keep pumping vacuum on the high side anyway. After adding the oil, hook up the gauge set normally and evacuate fully.
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