Combines retrofiting R12 to 134a on l3 Gleaner

I think the oil for R-12 is not compatible with the 134 oil.

you should not only drain and flush the compressor but all of the lines should be flushed with a good a_c flush. at least an hour on a vacuum pump and then fill with 134a.........

Where you been vstkIJ Roy keeping you busyIJ I guess your gonna tell me you been doing some fishing.....

Change the receiver drier, flush if possible, the orings for 134a are not the same butttt we have been converting some and not changing if they are not leaking except at compressor. A good poicy is to change exp valve. There are kits available to add ester oil for these conversions from NAPA AutoZone ect. Conversion for adaptors to 134a gauges are also available and must be added to r12 compressors unless you are changin service valves... Pull a vacuum for a hour if possible, service valves open. Shut off the gauges and let it set for a while. The vacuum should stay with NO leak! If it leaks you must fix before continuing. We add dytel; a dye which shows leaks under black light. With unit shut off and both service valves open add liquid r134a until system equalizes with supply can. Shut off gauge valve to high side. Turn can to gas side - right side up - and start engine _ AC system- fan on high . Continue to add gas through suction side till you have approx 250 psi on the high side on a 85degree day. Can't go by bubbles in the sight glass on 134a. low side should be 15lbs or less. KEEP condensor coil clean! Hope this helps and I havn't made and faux pauxs....

We are getting our M2 recharged too and the mechanic that is doing this for us said that the newer coolant is alot more corrosive than the R12 and can cause problems down the road. I don't know if he's right on this I'm no expert but I thought I would say something. Curt

Try a hydrocarbon red tec 12 or duracool works great no retrofiting just add and go

I agree. Tom in MN

My brother put the red tec 12 in his tractor. Worked great. Nothing to flush; nothing to change.

hey t.leslie. yeppers been fishing all i can. the bad harvest rush is over. has been way over a 100 most days for a while now and misserable for sure. broke down and bought a new little boat. bought a bass buster trophy edition, am really liking it. you need to come over one day......just a little warning and will set up some fishing for sure. took this harvest a bit hard. i think it was the most hours i have put in for several years. chased combines to edge of neb. it really stretches you thin. how is that new scooter doinIJ oh ya gotts brag a bit, my 4 yrs old caught him a 4 1_2 lbs. bass the other night. was pretty cool. ..........vstk

We change the oil in compressor to Ester 100 and replace the rec,drier. Good idea to replace hose between compressor and condensor to barrior type hose. We like going with the R134a for it will be many years before the gov will figure out it is killing the grass at the north pole. Who knows where you can find some of the alternatives tomorrow. I'm still ticked off from when I recovered what I though was R12 into my machine to find out later is was some wild alternative which contaminated my 20 plus pounds of R12. If you us some alternative be sure to mark system with what is in there. R134a is in the millions of autos and is bound to be safer than some alternative. Good luck.