Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-18-2008, 09:52 PM
ri_truck_guy's Avatar
ri_truck_guy ri_truck_guy is offline
Posting Guru
 
Join Date: Jun 2002
Location: Suffolk, VA USA
Posts: 2,092
ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.
bill.csisar
A/C Pressure Relief Valve?

To make a very long story short, after copius amounts of research I converted my truck to an electric fan setup out of a Town Car. The idea was to wire the system with two relays, a 75 amp unit that controled the fan off a temperature switch, and a 30 amp that caused the 75 amp unit to connect when the A/C came on. Looked good in theory...had the right plan...installed it all exactly to the plan...and it turned out the 75 amp relay I ended up with was quirky and the 85/86 pins were opposite of a normal relay. I figured that out eventually, and everything works like a charm now, but before I did, I think I overpressured the A/C compressor by feeding power into it instead of getting trigger power for the 30 amp relay. I was in the cab when it went off. It sounded like something blew up, and there was refrigererant everywhere under the hood. I saw enough of what happened to know it came from somewhere on the top of the compresor. I couldn't see any visible damage, so I figured it blew a seal. After I bled off the rest of the pressure, I replaced all the seals, and found none to be damaged. But one other thing I did find was what apprears to be a pressure relief valve on the top of the compressor. It's actually on one of the hose assemblies and protudes from the bracket where the hose bolts on. So, two questions...first, is this really a pressure valve? And two, if it does release pressure, is there any permanent damage to it or the compressor? I can't find it documented anywhere in the reference material I have.
__________________
Bill
14 Ram 3500 Mega Cab DRW CTD 4x4
12 F150 Fx4 Supercrew Ecoboost w/Max Tow (Sold)
86 F150 4x4 5.0 H.O. w/Mass Air Conversion (Sold)
10 Harley Davidson Electra Glide Ultra Limited
"Everybody has issues. Some people's are just more interesting"
Reply With Quote
  #2  
Old 04-18-2008, 10:06 PM
King Triton's Avatar
King Triton King Triton is offline
Postmaster
 
Join Date: Mar 2004
Location: Michigan
Posts: 3,918
King Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud ofKing Triton has much to be proud of
Yes, if you are describing it correctly it is a pressure relief valve. No,,you shouldn't cause any major damage just by over pressuring it.That is what it is for. There are many things that can cause a system to over pressurize,and if it weren't for the relief valve,,you would blow o-rings and seals,,to say the least. One thing I would mention though,,,if you see alot of oil residue,I would think of adding a couple of ounces to the system.
__________________
Disclaimer: Not safe for human consumption by those allergic to smoked meat.
Reply With Quote
  #3  
Old 04-19-2008, 08:27 AM
Archion's Avatar
Archion Archion is offline
WV Chapter LDR
 
Join Date: Jan 2007
Location: Falling Waters, WV
Posts: 3,401
Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.
partsguymatt PartsGuyMatt mvose OVC Archion
And the best part is they are near impossible to find without buying a new hose assembly. I think napa had them at one time, but that was 3 years ago. If it blw it did it's job and save the compressor.
__________________
Matt - WV Chapter Leader and Reformed Parts Guy
02 Excursion XLT V10 4WD - 12 Escape L4 XLT AWD - 99 Mustang 3.8L 'Vert - 96 Wilderness 22LW TT
JOIN THE WEST VIRGINIA CHAPTER CLICK HERE
#22needsaface - Help serve those who served you.
Reply With Quote
  #4  
Old 04-19-2008, 01:30 PM
ri_truck_guy's Avatar
ri_truck_guy ri_truck_guy is offline
Posting Guru
 
Join Date: Jun 2002
Location: Suffolk, VA USA
Posts: 2,092
ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.
bill.csisar
Ok....so it sounds like this is a one-use only item and not availabe as a seperate part. And from what I can see, isn't availabe as part of a hose assembly. It acutally sits in a steel line that connects the hose to the compressor...it's not really part of either but rather a stand alone part. Numberdummy, any thoughts on this one?
__________________
Bill
14 Ram 3500 Mega Cab DRW CTD 4x4
12 F150 Fx4 Supercrew Ecoboost w/Max Tow (Sold)
86 F150 4x4 5.0 H.O. w/Mass Air Conversion (Sold)
10 Harley Davidson Electra Glide Ultra Limited
"Everybody has issues. Some people's are just more interesting"
Reply With Quote
  #5  
Old 04-20-2008, 12:23 PM
Archion's Avatar
Archion Archion is offline
WV Chapter LDR
 
Join Date: Jan 2007
Location: Falling Waters, WV
Posts: 3,401
Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.Archion has a spectacular reputation.
partsguymatt PartsGuyMatt mvose OVC Archion
I think this is the closest I can find by description, Motorcraft # YF1264, Rock has a picture of it here...

Manufacturer Info
__________________
Matt - WV Chapter Leader and Reformed Parts Guy
02 Excursion XLT V10 4WD - 12 Escape L4 XLT AWD - 99 Mustang 3.8L 'Vert - 96 Wilderness 22LW TT
JOIN THE WEST VIRGINIA CHAPTER CLICK HERE
#22needsaface - Help serve those who served you.
Reply With Quote
  #6  
Old 04-20-2008, 01:38 PM
ri_truck_guy's Avatar
ri_truck_guy ri_truck_guy is offline
Posting Guru
 
Join Date: Jun 2002
Location: Suffolk, VA USA
Posts: 2,092
ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.ri_truck_guy has a great reputation on FTE.
bill.csisar
Thanks Matt....I'm finding in some other forums that I might not need to replace the valve. The compressor itself is ok...I got that to fire by briefly bypassing the pressure switch. I have a couple of hours tomorrow morning before I have to catch a flight...I'm going to try to get the system vacuumed and see if it holds. If it does I'll recharge it and see what happens.
__________________
Bill
14 Ram 3500 Mega Cab DRW CTD 4x4
12 F150 Fx4 Supercrew Ecoboost w/Max Tow (Sold)
86 F150 4x4 5.0 H.O. w/Mass Air Conversion (Sold)
10 Harley Davidson Electra Glide Ultra Limited
"Everybody has issues. Some people's are just more interesting"
Reply With Quote
  #7  
Old 04-21-2008, 05:53 PM
Piffery1 Piffery1 is offline
Posting Guru
 
Join Date: Jun 2004
Location: Niceville, FL.
Posts: 1,634
Piffery1 is gaining momentum as a positive member of FTE.
You should put on a high pressure cutout switch like the one in this link: AC - HIGH-PRESSURE CUT-OUT SWITCH KIT - JCWhitney Auto Parts . I've used them on every R12 to R134A conversion I've done and they work great. With one installed you never exceed safe pressure because it shuts down the compressor clutch.
Reply With Quote
Old 04-21-2008, 05:53 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
What pressure does the A/C system begin to blow-off/vent? jtharvey 1999 - 2003 7.3L Power Stroke Diesel 9 08-04-2008 10:50 AM
ac compressor valve? whits 1999 - 2003 7.3L Power Stroke Diesel 1 06-28-2007 03:59 PM
A/C Quit Working Pookie's Dad 1999 - 2003 7.3L Power Stroke Diesel 12 05-16-2007 10:02 PM
non ford ac ????'s nasa-hvac Cooling, Heating, Ventilation & A/C 1 07-29-2004 09:49 PM
'66 A/C banjopicker66 1961 - 1966 F-100 & Larger F-Series Trucks 1 06-29-2002 04:14 PM


Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks

Tags
1992, 2002, ac, bypassing, compressor, f250, focus, ford, high, mustang, pressure, relief, switch, trucks, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 04:30 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup