Its a Yellow Jacket pump and I bought Yellow Jacket oil and drained the pump and filled to the line on the sight glass.

Newbie question, I have a second hand Yellow Jacket vacuum pump which seems to work well, I drained and refilled the oil but when I used it there was vapour coming from the breather on the top. Is this normal, is there a problem with the pump or is it showing there was a lot of water in the system b...

Ive done the test again taking note to keep the engine revs at 1500rpm. You will see the high pressure rise and fall as the trinary switch signals the fans, this is part of the design and is in the installation notes on the system. I have made a short video of the test and from my very limited knowl...

Thats a modernised rebuild with an LS engine and modified throughout. I like to keep mine almost standard with a few subtle and mostly hidden upgrades. To answer some of the questions and advice given. I will take readings again although its now colder here in the UK, 20c is average in summer but no...

I am just starting to learn about ac systems, I have worked on them for a few years removing old R12 systems and fitting all new components with the exception of the evaporator on classic cars.It also helps I am a qualified auto electrician so the wiring side is no problem. However due to problems g...

Thank-you I just wanted an idea of how many tests, thats great I will order a 10L bottle as that will last me ages based on installing 2-3 systems a year.

Hi Forgive the simple question but im new to this and want to get a bottle of Oxygen Free Nitrogen for pressure testing completely new systems that I replace on classic cars and wondered how many systems I could test with a 10L bottle. I know the answer will be approximate depending on system size b...