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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

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Old 05-07-2012, 07:10 AM
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Roelito78 Roelito78 is offline
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AC compressor on 351m question

Hello guys,

Yesterday, I decided to replace my ac compressor on my 79 F150. After the compressor, drier were installed and all my lines cleaned out I began to recharge my system with freon. As I started my ac as soon as the ac clutch would kick on my truck would die. I also noticed high pressure on my guages like there is a restriction somewhere. Like I mentioned I did clean out all the lines. One thing I did notice is that the compressor came with oil from the parts store but I had already added 8 oz extra without knowing. Could this be the problem? I managed to get rid of some of the oil by deppresuring the system but not sure if I should drain ut all and start over. Any advise? Thanks
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Old 05-08-2012, 01:55 AM
VocaTexas VocaTexas is offline
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I'm no A/C expert, but it sounds like you've got too much oil and it's causing your compressor to hydraulically lock up. I'd drain the oil and start over.
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Old 05-08-2012, 05:18 AM
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Quote:
Originally Posted by VocaTexas View Post
I'm no A/C expert, but it sounds like you've got too much oil and it's causing your compressor to hydraulically lock up. I'd drain the oil and start over.
Thanks! Will do
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Old 05-08-2012, 06:41 AM
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Did you check the orfice tube?
Is this a NEW compressor?
8 OZ is alot but most of the excess should be sucked up by the desicant in the drier.
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Old 05-08-2012, 06:43 AM
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Did you check the orfice tube?
Is this a NEW compressor?
New compressor and did not check the orifice tube. Is there anything I need to check in particular? Thanks
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Old 05-08-2012, 06:51 AM
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I did notice that when the system was deppresured and some of the oil removed the truck did not stall anymore when the ac was turned on. Now the only problem is high pressure on my ac guages while trying to charge system.
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Old 05-09-2012, 08:04 AM
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The orfice tube is like a filter and can get clogged. It should be in the hard line going into the evap. I think. Never had to change one. YET.
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Old 05-09-2012, 08:04 AM
 
 
 
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