I was going to install the components and then take it to a garage to have
it charged, after reading this post, I think I will have them do it all.
Thanks so much
Belle

"Oppie" > wrote in message
...
> Account for all oil contained in the parts you remove. Add new oil if
> required, especially if the oil leaked anywhere. Make sure if you add oil
> that you get the right oil for use with the HC134A refrigerant. This often
> winds up being a guestimate as the only way to know exactly how much oil
to
> use is by flushing the entire sealed system and starting fresh. This
> requires special equipment though. Do NOT use compressed air!
>
> When the sealed system is back together, attach a manifold gauge set to
the
> low and high side service ports and evacuate to better than 29" Hg. This
> step is particularly important as the vacuum will get any water in the
> system to be vaporized and expelled. The desiccant in the receiver/drier
> will trap moisture but it is best to start as clean as possible. Moisture
> will usually choke the expansion valve and cause problems. Depending on
your
> vacuum pump, it should take about an hour to properly evacuate the system.
> Close both high and low side valves on the gauge manifold. and watch the
> compound (low side) gauge to verify that the system is holding vacuum.
>
> Remove the hose from the vacuum pump and connect to a can of refrigerant.
> Open the valve on the refrigerant and carefully loosen the hose fitting at
> the manifold side to purge air from the hose. Tighten the fitting again
and
> start charging the system by again opening the high and low side manifold
> valves. Refrigerant is added by weight according to the spec for your
model.
> Charge with vapor only! Can must be upright or you will get liquid which
> flushes oil from the compressor and will kill the bearings on startup.You
> can hasten charging by putting the refrigerant in a warm water bath. When
> you can't get anymore '134 to flow (and have not reached the specified
> weight of gas to add) close the high side manifold gauge, start the engine
> and turn on the AC. Compressor suction should now draw in the remainder of
> the charge. Make sure that the high side valve is closed before starting
> engine. Depending on your equipment, a can may rupture from failing to
close
> the high side valve.
>
> When done, turn off the engine and wait for the pressures to equalize and
> disconnect the gauge set quickly to minimize gas leak. I hold down the
hose
> to keep the seal while removing the fitting and then pull back quickly.
>
> Wear safety glasses when working with refrigerants. Should you get a leak
of
> liquid spray on you, it freezes tissue on contact.
>
> There are shortcuts but they do have consequences. Hope this either helps
> you or convinces you to get it done professionally. Nothing wrong with
> replacing the components yourself and then having the evacuation/recharge
> done by a garage.
>
> Oppie
>
>
> "Belle" > wrote in message
> ink.net...
> > Is there anything I need to know when changing these and recharging on a
> > 2000 LS 200 3.0?
> > Thanks
> > Ed
> >
>
>