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Old 06-27-2018, 09:50 AM   #1
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Low pressure port on R134A system

Hi 2005 American Tradition having issues with front ac bought coolant to recharge but can't find low pressure service port was told is was near compressor any body have a clue?
Thanks
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Old 06-27-2018, 09:57 AM   #2
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Low pressure port on R134A system

2005 American Tradition having issues with front ac bought coolant to recharge but can't find low pressure service port was told is was near compressor any body have a clue
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Old 06-27-2018, 09:58 AM   #3
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Yes, there is generally a 134a port on the hose coming off the compressor head (can you see the compressor/hoses clearly), but it could also be located on the accumulator (which on my coach is at the front of coach near the condenser.

My coach has the condenser and accumulator mounted just under the front bumper/headlight area with a 12V fan mounted on it. My low pressure (and high pressure) ports are both located at the compressor though.
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Old 06-27-2018, 10:01 AM   #4
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Thanks next rest area going to look again
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Old 06-27-2018, 10:06 AM   #5
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On many A/C systems where the engine/compressor is in the rear and the evaporating coil is in front, they have two sets of ports. One set in the lines near the compressor, another set in front, near where the hoses enter the plenum. To do a proper charge, you really need a manifold set of gauges. High pressure is as important as low pressure when charging the system.
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Old 06-27-2018, 10:39 AM   #6
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On our Journey it's located up front above the genset and just prior to the heater. Much easier to get to. Look there first.
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Old 06-27-2018, 10:43 AM   #7
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Both of mine are located up front where they go into the dash heater/AC box.
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Old 06-27-2018, 10:44 AM   #8
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Mind is in fairly plain sight a couple feet from the AC compressor.
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Old 06-27-2018, 12:00 PM   #9
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Well,
Not being an RV designer and or chassis designer, I can only guess as to the reason(s) why and where they put them is for access. It seems, by most answers here that, if the coach is a rear radiator, the ports are most likely up front, above the gen in most cases. But, If your coach is a side radiator, and the A/C pump is purely visible, well then the ports are at or close to that pump. Just a guess here. Our ports, on our coach, an '04 Itasca Horizon 36GD with the C-7 330HP CAT, are up front, just inside the deck lid that tilts up.
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Old 06-27-2018, 12:11 PM   #10
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Quote:
Originally Posted by FIRE UP View Post
Well,
if the coach is a rear radiator, the ports are most likely up front, above the gen in most cases. But, If your coach is a side radiator, and the A/C pump is purely visible, well then the ports are at or close to that pump.
That sounds logical.
I wonder if the Monaco engineers are logical
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Old 06-28-2018, 09:50 AM   #11
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Can I get the name of the place you use to drop out your generator and replace parts? I have an Onan 7500 Quiet Diesel that is overheating and requires drop out.
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Old 06-28-2018, 11:17 AM   #12
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BOOM, thread killer!
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Old 06-28-2018, 11:24 AM   #13
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BOOM, thread killer!
Doesn't kill the thread, but definitely a first-time post, referencing something that wasn't in the thread. Give them a break.
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Old 07-01-2018, 10:00 PM   #14
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Your 05 Tradition low port is in the forward left compartment
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