crimsoneclipse Posted June 28, 2014 Report Share Posted June 28, 2014 The whole story: The compressor belt was squeaking,so i replaced the belt. Then the A/C was blowing less cold day by day until it was mostly useless. I added Freon but it still didn't really cool. Here's the strange part, the link below shows the drier. The little bolt has a small valve that is leaking and green, likely from previous owner trying to diagnose a leak. Today I saw metal flakes come out of the valve and fall onto the assembly. http://i.imgur.com/ZYijz9N.jpg I'm 90% sure this means the compressor is done but I would also like to hear other opinions. The drier also looks like original equipment. wheeeee! Quote Link to comment
JoeCool Posted June 28, 2014 Report Share Posted June 28, 2014 My 720 has a weird AC problem... everything is missing! It just don't work! 1 Quote Link to comment
crimsoneclipse Posted June 28, 2014 Author Report Share Posted June 28, 2014 My 720 has a weird AC problem... everything is missing! It just don't work! Ah, the classic 2/55 A/C system I'll likely install mine this weekend. Quote Link to comment
Z-train Posted June 28, 2014 Report Share Posted June 28, 2014 The system is just about shot.THe MOST critical thing for an A/C system is that it is clean.It needs to be douched out thoroughly.ANd the Compressor replaced. Quote Link to comment
JoeCool Posted June 28, 2014 Report Share Posted June 28, 2014 Ah, the classic 2/55 A/C system I'll likely install mine this weekend. Nope, 3-55... the back window opens as well! Quote Link to comment
Tinman Posted June 28, 2014 Report Share Posted June 28, 2014 Oh Jeez.... 4-55! I have a sunroof! Looks like the compressor ate itself in that pic. Quote Link to comment
crimsoneclipse Posted June 29, 2014 Author Report Share Posted June 29, 2014 2-55 A/C system installed. Not your fancy-schmancy 3-55 or 4-55, I mean, I'm no billionair. Found metal flakes in a couple of pipes. The condenser looks like original equipment, as is the dryer. The pulley was also shot. I'll try to take apart the compressor just for the experience and to see what failed. I might sell the low pressure hose on Ebay as it looks brand new with foam insulation. If there is any compressor tear down carnage, I will post pics. Quote Link to comment
CicliDevotion Posted June 29, 2014 Report Share Posted June 29, 2014 When my A/C is running, it totally changes the idle of my truck. Not just a steady increase in speed, but a "throbbing". Is that normal for a 720? Quote Link to comment
crimsoneclipse Posted June 29, 2014 Author Report Share Posted June 29, 2014 It could be the compressor engaging and dis-engaging. Use a flashlight to see of the center of the compressor is engaging when you hear the RPM change. (please keep fingers and long hair clear) Quote Link to comment
crimsoneclipse Posted July 2, 2014 Author Report Share Posted July 2, 2014 The compressor was original equipment, and originally used R12. I was able to push open the suction valve and saw some more metal flakes (where else are they going to come from? It also required a special extractor to remove the clutch, so I gave up and tossed it. One less thing I suppose. Quote Link to comment
_chiefjt Posted July 2, 2014 Report Share Posted July 2, 2014 When my A/C is running, it totally changes the idle of my truck. Not just a steady increase in speed, but a "throbbing". Is that normal for a 720? Yes it's sounds somewhat normal. When you engage the a/c compressor it puts a load on the engine which drops the idle but if your running stock carb there should be an idle up on it. When you turn the compressor on it send a signal the a vacuum switch on the top right in your engine bay. That switch opens and gives vacuum to the idle up solenoid on the carb. to increase the idle and make up for that load. And if your a/c is turning on and off your likely low on refrigerant and you probably have a leak somewhere. The compressor was original equipment, and originally used R12. I was able to push open the suction valve and saw some more metal flakes (where else are they going to come from? It also required a special extractor to remove the clutch, so I gave up and tossed it. One less thing I suppose. Your compressor likely went out. What probably happened is your drier went bad and leaked out all the refrigerant. Refrigerant carry's oil to the compressor so when it all leaked out it also leaked out the compressor oil. That's why you see metal flakes because your compressor was pumping dry and is now bad. Not all oil travels with the refrigerant but after some time it eventually get it all out after using the a/c. Quote Link to comment
crimsoneclipse Posted July 3, 2014 Author Report Share Posted July 3, 2014 The compressor failed enough to make flakes, which clogged the drier. The freon was full. Still had a considerable amount of oil and dye. Kinda too bad. Quote Link to comment
_chiefjt Posted July 3, 2014 Report Share Posted July 3, 2014 Is the compressor leaking out the front seal. If so that could have caused it to make metal flakes. But it could be like you said because of old age compressor. Quote Link to comment
crimsoneclipse Posted July 4, 2014 Author Report Share Posted July 4, 2014 Well, it was actually leaking out of the drier. It was a slow leak but manageable. Then I noticed the metal flakes. Soon after it ceased cooling but would not take anymore freon. None of the rest of the system had any obvious leaks. Also, when draining the freon, it was bright yellow green and was clumping. Possibly a leak sealer. It is also the leak sealer in combination with the metal flakes caused the clog. Except for the new suction line, it was all original equipment. Quote Link to comment
_chiefjt Posted July 4, 2014 Report Share Posted July 4, 2014 If the drier was the initial leak where it all started then it would've leaked out leaving the compressor dry to start flaking up. If you recharged it and didn't put oil back in the system it probably ruined the compressor. Did you evac the system when you put the new suction line on? Quote Link to comment
crimsoneclipse Posted July 4, 2014 Author Report Share Posted July 4, 2014 I didn't put the suction line. Previous owner. Quote Link to comment
_chiefjt Posted July 4, 2014 Report Share Posted July 4, 2014 oh.well now that you know its shot what are you gonna do now? If the a/c lines are still good I would suggest getting a new evap. core, new drier, new condenser and new compressor. But if your trying to save some money then flushing out the evap. core and condenser should be fine. The driers are cheap, well I got mine for like $11 bucks. Quote Link to comment
crimsoneclipse Posted July 5, 2014 Author Report Share Posted July 5, 2014 Pull the A/C and be done with it. (already done) It's a beater work truck that I'll keep for a year or so. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.