AC high pressure hose replaced …

[Carl Moser]

My AC high pressure hose had a leak in the rubber part.

I replaced it with a new hose but did not use any rubber washers
as the original part did not have any when I removed it.

So, is this correct? No rubber washers at either end of the High Pressure Hose?

Car is a 1986 Mercedes 560SL.

Awaiting advice before I charge.

Thanks

Carl

Topic

[Its me]

I cannot tell you if yours had rubber washers or not. However, if you do not get the answer, I would just replace the hose as you found the original one (without washer), put the system under vacuum (as you have to evacuate it anyway) and watch the gauge to ensure the vacuum holds. Then I would shake the hose to see if it would cause any leak… If the vacuum holds solid, then I would call it a fix.

JMHO

Karl

[Carl Moser]

I need to clarify – got confused with so many other things I was doing.

The High Pressure hose as it attaches to the Receiver/Dryer does have an O-ring – I double
checked. But, the connection to the Expansion Valve on the Evaporator under the dash
did not have an O-ring. Further looking at the old hose end that attaches to the
Expansion Valve, the mating surface is concave sorta like it was designed to mate
to a convex surface. All this is new to me but I find AC interesting.

I’m vacuuming the system now and hope it holds.

Anyone have any comments about this?

Thanks

Carl

[college man]

Usually systems have o’rings. vacuum the system and
see if it holds. give it a 1/2-1 hour if it holds. then
charge.

[Tom]

I don’t know a thing about your AC system. The ones I’ve messed about with all had O rings on all the connections, however, vacuum is the great story teller for AC leaks. Vacuum it for half an hour, then close both valves on your manifold set, turn off the vacuum pump, and wait another half an hour. If it is still holding vacuum, wiggle that hose around like college man suggested. If that doesn’t cause the vacuum to drop, you should be good to go.

[Author]

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