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air conditioning rebuild |
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daverich
AMC Fan Joined: Dec/08/2012 Location: NJ Status: Offline Points: 21 |
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Posted: Sep/23/2016 at 1:39pm |
I have rebuilt the air cond. on my 73 Javelin but have a problem. The valve coupling at dryer, that connects to line with site glass fell apart. Can the system work without the inside parts to this coupling. I have been told it was only needed due to the fabrication process at AMC. I thought this piece regulated the high/low side pressure. All help greatly appreciated. Dave
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Not sure without a picture... earlier AC systems used a valve that some could remove to allow good pressure for 134a conversion. I have a 71, though the coupling seems different than pre 71 systems, though I do have the sight glass as many AMC cars do.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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dltowers
Supporter of TheAMCForum Joined: Dec/12/2012 Location: Friendswood, TX Status: Offline Points: 5822 |
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David, this is a photo of a '74 setup.
I know that the actual dryer is different from '73 to '74, but the coupling may be similar....
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Original Owner, 1974 Javelin:
360ci,2v,727TC. Motorola Multiplex with 8-Track. G4 Plum exterior with 421Q Black Uganda Interior. Purchased on July 16, 1974 from Hooker AMC, Sherman, TX for $4500.20 |
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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If you are talking about the check valve inside the brass coupling that Dickie is showing in his pic above. The answer is it is NOT needed, HOWEVER you have to remove the mate check valve on the dryer side too. Put new o-rings on the hose and the dryer and re-install the factory "quick disconnect", without BOTH check valves. These check were put in place to allow the factory to pre-charge the evaporator with a full load of Freon. They actually cause a restriction in the line and catch debris.......
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Ah, so that is why my 71 has a difference. Possibly from a service done long ago.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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daverich
AMC Fan Joined: Dec/08/2012 Location: NJ Status: Offline Points: 21 |
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OK I know there is a valve in the brass fitting, which is destroyed, but where is the other check valve? Don't recall seeing any other check valves and do not have a good schematic
of a/c system. Thanks Dave
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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The two mating check valves of the two haves of the Brass Coupling, between the dryer and the hose that contains the glass lense to view the Freon as it travels through the system. You can buy new brass couplings from the Ford Mustang folks, the exact same part was used on 67 - 73 Mustangs with factory Air..
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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daverich
AMC Fan Joined: Dec/08/2012 Location: NJ Status: Offline Points: 21 |
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Now I have it. Thank you very much. Dave
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