Air con query...

[REStracTORATION]

Hi all,
Can a r12 system (ford tw20) 1982, be converted to run the newer r134a refrigerant etc I know the ports are different and the old systems runs at a lower pressure so the new refill is to be 85%capacity as specified.

Or

Does anyone know of a company that will make a kit for this tractor or point me in the direction.

Quite fed up of getting fobbed off with a.c. firms you mention 80s tractor and instantly NO!
Which I think isn't really the answer.

Curious to know if any of you have altered to a newer system

Thank you

 

[Zippy768]

Hi all,
Can a r12 system (ford tw20) 1982, be converted to run the newer r134a refrigerant etc I know the ports are different and the old systems runs at a lower pressure so the new refill is to be 85%capacity as specified.

Or

Does anyone know of a company that will make a kit for this tractor or point me in the direction.

Quite fed up of getting fobbed off with a.c. firms you mention 80s tractor and instantly NO!
Which I think isn't really the answer.

Curious to know if any of you have altered to a newer system

Thank you

I believe all the pipes and hoses will need replacing as well as pump, condenser etc. System, I think, also has to be completely drained.
Had the same question regarding our combine.
It can be converted.....at a cost.

Also, waste of time trying to get an a.c firm to sort it. Will just wash their hands of it. You need to try your local independent Ford man.

 

[MF 168]

No problem at all. As mentioned you need a new receiver drier ( thats a black bottle shaped thing normally residing beside the AC rad up front of the tractor) but it's not the end of the world if you can't get it. You absolutely have to drain the old oil out of the AC compressor and put in the correct amount of the newer oil suitable for the R134A gas. I can't remember the oil grade now but if I think of it later I'll have a look at the can in the workshop. I have found with those old dual piston type compressors like on your TW that about 150-180 psi on the high pressure side and about 12-20 psi on the low pressure side when the compressor is cycling gives the best results. Don't go to much over those pressures or you risk doing harm. Pay more attention to the high pressure side when charging the system. The low pressure numbers I gave you can vary a fair bit between AC systems and aren't really accurate.

 

[MF 168]

Forgot to say there's no need to go changing the rubber lines.

 

[Pheasant Surprise]

@Timbo

 

[REStracTORATION]

No problem at all. As mentioned you need a new receiver drier ( thats a black bottle shaped thing normally residing beside the AC rad up front of the tractor) but it's not the end of the world if you can't get it. You absolutely have to drain the old oil out of the AC compressor and put in the correct amount of the newer oil suitable for the R134A gas. I can't remember the oil grade now but if I think of it later I'll have a look at the can in the workshop. I have found with those old dual piston type compressors like on your TW that about 150-180 psi on the high pressure side and about 12-20 psi on the low pressure side when the compressor is cycling gives the best results. Don't go to much over those pressures or you risk doing harm. Pay more attention to the high pressure side when charging the system. The low pressure numbers I gave you can vary a fair bit between AC systems and aren't really accurate.

Thank you so much
That makes sense, It's going to be restored this tractor so I'll end up getting new pipes made and compressor reconditioned etc

Those figures are spot on Thank you

We have the a.c. machine to fill and empty systems
But it's just the initial system hardware that were not familiar
Us being old cables tractor lads

 

[Exfarmer]

I think the biggest issue with old systems, is that having stood about a long time the seals dry out and will never hold gas.

 

[Electronic]

I have two 1980s MFs which both originally held R12. I changed compressor, expansion valve and drier. Both systems work fine, it is not necessary to change the pipes.

I found Papworth Vehicle Air Conditioning 01954 267215 very helpful for advice and parts. A new compressor may be quite reasonable from them.

 

[REStracTORATION]

I have two 1980s MFs which both originally held R12. I changed compressor, expansion valve and drier. Both systems work fine, it is not necessary to change the pipes.

I found Papworth Vehicle Air Conditioning 01954 267215 very helpful for advice and parts. A new compressor may be quite reasonable from them.

That exactly the answer I'm needing Thank you very much

 

[REStracTORATION]

I think the biggest issue with old systems, is that having stood about a long time the seals dry out and will never hold gas.

Yes
It is an any issue on any system

As long as it works when it leaves here

 

[Flat 10]

I have two 1980s MFs which both originally held R12. I changed compressor, expansion valve and drier. Both systems work fine, it is not necessary to change the pipes.

I found Papworth Vehicle Air Conditioning 01954 267215 very helpful for advice and parts. A new compressor may be quite reasonable from them.

He’s on here and may show up in a minute. Good company.

 

[puntabrava]

Gosh, all seems a bit complicated, we just vacced out the old JD,s and refilled with the new gas.

 

[Hesston4860s]

Gosh, all seems a bit complicated, we just vacced out the old JD,s and refilled with the new gas.

That’s all they did on my 3050 and 4755 when they where changed over years ago, the 47 still works fine. The 3050 needs a new pipe now as it’s rubbed tho on summut !, but was fine also till then.

 

[db9go]

Just do with R134A as if it was R12 no problem have done many

 

[REStracTORATION]

Just do with R134A as if it was R12 no problem have done many

Ok Thanks I'll get the pump reconditioned as it's been out of action for many years

The fill points is there adaptors to convert the old to new system

 

[Hesston4860s]

Ok Thanks I'll get the pump reconditioned as it's been out of action for many years

The fill points is there adaptors to convert the old to new system

These should be what you need
https://www.ebay.co.uk/itm/R12-to-R...275317&hash=item23b5feee62:g:sY0AAOSwvtBcZHNU

 

[REStracTORATION]

These should be what you need
https://www.ebay.co.uk/itm/R12-to-R...275317&hash=item23b5feee62:g:sY0AAOSwvtBcZHNU

Perfect
Many thanks

 

[Owz130]

Very interesting topic as i also have a ford 8340 that lost its gas. It worked perfectly before hand.
Is it possible to vac out the r12 system using a r134a machine?
Would people be willing to contaminate their r134a machine with r12? Or does it not work like that?
Don’t understand much about a/c systems.

 

[REStracTORATION]

Very interesting topic as i also have a ford 8340 that lost its gas. It worked perfectly before hand.
Is it possible to vac out the r12 system using a r134a machine?
Would people be willing to contaminate their r134a machine with r12? Or does it not work like that?
Don’t understand much about a/c systems.

Your I guess will be 134a I think r12 was not used after 92 I think I could be wrong

 

[Owz130]

It is an early 92 with the old style ports to charge the system. Could it possibly be 134a with the old ports? Happy days if it is!