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Topic: 1989 GV Dash Air Freon Capacity (Read 1061 times) previous topic - next topic

1989 GV Dash Air Freon Capacity

I realize I am reaching out there when I ask what the freon capacity is for a 1989 GV Dash AC but I cannot find the info anywhere. So I am hoping someone here knows.
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: 1989 GV Dash Air Freon Capacity

Reply #1 –
Are You still R-12? or has it been converted to 134a?
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: 1989 GV Dash Air Freon Capacity

Reply #2 –
You really don't need that information to get the system up and running. I tried the volume method with the information from Beam Alarm and my pressures seemed off. Put a thermometer in the dash register and charged until I had sweat at the compressor on the low side, then fine tuned to get the coldest air. The thermostat shuts my compressor off at 40 deg. at the dash.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 1989 GV Dash Air Freon Capacity

Reply #3 –
Quote from: stump –
Are You still R-12? or has it been converted to 134a?
I didn't ask that question. Hope it has been converted otherwise price prohibitive on r-12. It can be converted but the method I posted was for r-134a To convert from r-12 to r-134a the refrigerant oil has to be changed and 80% of the amount of r-12 used put in with r-134a. Which brings it back to needing the factory volume to do it without having to do trial and error on the charge.
 I believe it was around 1994 r134a was required in cars.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 1989 GV Dash Air Freon Capacity

Reply #4 –
Nighthawk,

I had a receipt from Oregon Motor Coach where they drained the freon (4 ounces) and refilled with 6.5lb. I used that figure when I changed out my compressor. About 10 cans. That seemed like a lot but there is about 80ft of hose back and forth to the compressor . It was too much. Had to drain out quite a bit then added a little before it would cool. I have to give a shout out to master technician Dave Katsuki for help in getting it going.

I agree with @craneman just add till the dash temp starts falling. It takes longer but it works.

Edit: I'd start with 4 or 5 cans then start keeping an eye on the dash temp.

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: 1989 GV Dash Air Freon Capacity

Reply #5 –
I have a 100# tank of R-12 But I'm still going to convert over to 134a just because it is readily available.
Speaking of refrigerant. R-22 which is probably in your house has gone up wholesale to about 600.00 for a 30# jug. Which is going to make servicing home units prohibitive requiring a system upgrade to R410a.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: 1989 GV Dash Air Freon Capacity

Reply #6 –
Stump, 100#!!!
I thought I was the only hoarder. I bought the 12 oz. cans for 50 cents back in the 60's then bought 30# bottles and never used the cans.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 1989 GV Dash Air Freon Capacity

Reply #7 –
Sorry you guys with the R-12 stash/hoard/potential goldmine. My coach and Triple nickle's coach have both been converted to R-134A
But thanks for the information.
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: 1989 GV Dash Air Freon Capacity

Reply #8 –
Then my first reply is where to start. Ken's starting count would be a good start.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: 1989 GV Dash Air Freon Capacity

Reply #9 –
I had a 1990 Grandvilla and was told by Foretravel that it required between 6-6.5 lbs of R-12 for full charge.  There are R-12 alternatives that work fine in the R-12 system that do not require system conversion.  Google R-12 replacement.  RedTech is the name that comes to mind.
If you call Foretravel they will give you the details on the charge required when using R-12.
Current coach 1996 U320 40'
Previous coach, 1990 36' U280

Re: 1989 GV Dash Air Freon Capacity

Reply #10 –
Here is a link to redtech R12a

RED TEK - 12a Refrigerant
Current coach 1996 U320 40'
Previous coach, 1990 36' U280

Re: 1989 GV Dash Air Freon Capacity

Reply #11 –
First, I want to thank everyone that supports this forum for all of their time and hard work.  You've been TREMENDOUS help in steering me to my first RV as I am now the proud owner of a "Baby" (2 month old to me) 1987 GV Oshkosh.

Hopefully this will help, my 40' was professionally converted in '99 to R-134a.  The sticker says to charge to 3 lbs. 0 oz.
'87 40' Grand Villa 4000 SBID ORED
CAT 3208TA 300Hp driving MT647, PacBrake
Unkown watts Solar
'17 Conti's HSR2 10-22.5
Cove, Texas
Previous: '76 to '16,  5' 10", 0.1Hp, hauling 85lb BackPack shod on Keen Boots

Re: 1989 GV Dash Air Freon Capacity

Reply #12 –
 I put the gauge on one fitting and charge the other, engine off, to about 110#.  Then start it up and make sure the compressor turns.  Start reading the gauges and the vent temps , adding carefully .

Re: 1989 GV Dash Air Freon Capacity

Reply #13 –
By the way, I opened the small access door up front, on the pass side, and there is a sticker on the Atwood AC/heater box that says 454 Chevrolet. And the dash controls are Ford. No wonder the darn system works so lousy!! They just can't agree!! >:D
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: 1989 GV Dash Air Freon Capacity

Reply #14 –
Yep, they used a big block Chevy system except for the compressor which is larger, and the Ford dash mounted goodies.
Current coach 1996 U320 40'
Previous coach, 1990 36' U280