Refrigerant charge amount, engine air
I have a 1987 Gulfstream Class A with a 1986 Ford 460 driveline. I want to connect a recycler and evacuate the system, vacuum, and then recharge with R-12. My question is, how do I find out the recha...
Forum Discussion
atsrmf,
Does the system need repair? Is there any R-12 in it now?
If it's still functional and doesn't require any attention, you can just add more R-12. Of course, FINDING someone who can do that might be a bit of a challenge.
Again, assuming the system is intact, do you know if you have a sight-glass in the system? If so, you can watch it and slowly charge the system until the bubbles disappear. If yours doesn't have a sight glass, then a proper set of gauges and the proper charts for that engine should get you close enough. If you're not sure of the graphs to use, then add the R-12 slowly and monitor the temperature of the cold air coming out of the (usually) center vent when it's set to MAX (usually). Charge a bit, stop...check the temp...wait a few minutes...charge a bit more...check the temp. If it went down, repeat the process. If it went up, then stop charging. Putting too much in will reduce cooling ability. BE SURE TO USE A THERMOMETER DESIGNED FOR A/C WORK!!!
On the other hand, if the system needs to be repaired, it's been opened or leaking, then a conversion to R-134 is probably in order.
Good Luck,
~Rick
Does the system need repair? Is there any R-12 in it now?
If it's still functional and doesn't require any attention, you can just add more R-12. Of course, FINDING someone who can do that might be a bit of a challenge.
Again, assuming the system is intact, do you know if you have a sight-glass in the system? If so, you can watch it and slowly charge the system until the bubbles disappear. If yours doesn't have a sight glass, then a proper set of gauges and the proper charts for that engine should get you close enough. If you're not sure of the graphs to use, then add the R-12 slowly and monitor the temperature of the cold air coming out of the (usually) center vent when it's set to MAX (usually). Charge a bit, stop...check the temp...wait a few minutes...charge a bit more...check the temp. If it went down, repeat the process. If it went up, then stop charging. Putting too much in will reduce cooling ability. BE SURE TO USE A THERMOMETER DESIGNED FOR A/C WORK!!!
On the other hand, if the system needs to be repaired, it's been opened or leaking, then a conversion to R-134 is probably in order.
Good Luck,
~Rick
