Re: IML: A/C ReVamp - RePlacing Parts?

[sosmi@xxxxxxxxxxx]

Steve, sorry you didn't read my last post, I was specific about charging through the hi-side initialy, THEN after start-up through the low, or suction side.In fact a near, to  perfect charge can be done without running the compressor at all, if you start with a 28-30" vacuum, you can charge with liquid refrigerant on the hi-side and dump gas till the pressure in the can is equal to the pressure in the system. You would need a can that is 15-30lb to do this, since the average car takes about 5lbs. Sorry again for the misunderstanding, Ya'll have a nice day, Dave.

 

> -------------- Original message -------------- 
> From: "Steve B." <Imperial59@xxxxxxxxxxxxxxx> 
>
> > >.It's best to charge through the HI-SIDE, or compressor discharge side, 
> > >this prevents SLUGGING the compressor at start->up. Evacuating the system 
> > >will not remove the lubrication oil, so careful measurement of oil in the 
> > >compressor is important. 
> > 
> > You can dump the initial can in to the high side ***with the engine off***. 
> > You never want to charge through the high side with the compressor running. 
> > The high side pressure on a running system can top 250psi and those little 
> > cans have a design spec of 180psi. Also be careful not to sit the can of 
> > refrigerant on the engine. At 130 degrees the pressure in the can is 
> > 200psi. 
> > 
> > A couple of other thoughts here... 
> >
>  All the rubber hoses should be replaced. Any a/c shop can take your 
> > existing hoses and replace the hose while reusing your ends. Just like all 
> > the rest of the hoses a/c hoses age and can fail. I had a high pressure 
> > hose blow on me one time while charging and you would be amazed at the huge 
> > cloud of refrigerant / oil it made. One of the very few times in my life I 
> > wondered if I was dead for a second or two.... My '73 didn't let go right 
> > away but after a month or so the low pressure line grew a bubble that got 
> > bigger and bigger until it let go one day and let out all the refrigerant. 
> > It is disheartening when that happens because you have to start all over 
> > again with a new dryer / oil / vacuum and recharge. 
> > 
> > Replace all the o-rings while it is apart. That are dirt cheap and not hard 
> > to replace. 
> > 
> > Make sure you charge with a good set of gauges that lets you watch 
> the high 
> > and low pressure sides while charging. Situations can develop that will 
> > send the high side through the roof while everything still looks decent on 
> > the low side. 
> > 
> > Steve B. 
> > 
> > 
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