i'm hoping for superior knowledge on A/C gases etc.
Just discovered HR12 available in 300g cans. It is hydrocarbon and it's makers claim great performance. www.hychill.com
As i've invested in a set of gauges and hoses and being fedup with the time and money it takes for shops to regas with not always good results i decided to have a go. If there is a leakage i can replace o-rings etc in my own time.
For evacuating the system i use a fridge compressor in reverse. It pulls 30 inHG in Melbourne (Surrey Hills). For weighing the gas i use digital kitchen scales ($65).
In the last two days i 'did' my daughters 84 Pulsar and it cools to 8 deg C. at 20 deg C. ambient. My other daughter's Suzuki 998cc (yeah, i know it is a lawn mower motor but the thing is surprisingly good around town) after replacing all the O - rings, evacuating and recharging i have a high low side (between 80 and 110 psi) and a low high side reading not much higher.
The puzzling thing (to me) is that this indicates a compressor problem/low side obstruction. Yet, the vent temp. is cycling between 2.2 and 4.6 deg C.
So, it works, but there is a problem.
I'll get to the 19's soon. One was converted to R134a but i'm not sure it was done properly (not just fittin a 134a fittin on the low side and gassing it up. It only cools to 11 deg. C. at 25 deg. C. ambient.
Any ideas would be very much appreciated.