I need a schematic for
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 27
Likes: 0
I need a schematic for
the a/c system for a2001 PSD 7.3L.
Specifically, I need to know how to access the evap coil. Everything on my a/c system is working, including the compressor, and I am not producing very cold air.
In fact, the hotter it gets during the day, the less the a/c works.
I am confident in the charge, and the air flow seems to be adequate.
I was thinking maybe a dirty coil. I am an a/c professional so I know a little about car refrigeration. I am always up for some advice though!!
Specifically, I need to know how to access the evap coil. Everything on my a/c system is working, including the compressor, and I am not producing very cold air.
In fact, the hotter it gets during the day, the less the a/c works.
I am confident in the charge, and the air flow seems to be adequate.
I was thinking maybe a dirty coil. I am an a/c professional so I know a little about car refrigeration. I am always up for some advice though!!
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Is the air gap OK between the clutch and the clutch plate? If it gets too wide from wear (and I'm sure you already know this, but am only commenting on the rare chance you don't), you can see the exact same symptoms as the day heats up. Reducing the shims to obtain minimum air gap without engaging the clutch 100% of the time might be a simple fix for you.
From what I've read, the clutch coil rarely goes out, but the clutch air gap is a known and easily fixed problem.
If that is your problem, I just ordered (online) a brand new Motorcraft clutch (w/o the coil) from Tousley Ford for about $35, and took this approach only so I can set my used clutch aside as an emergency spare for my other two 7.3's.
I have some schematics, but they're on my other laptop at home and I can;t access them from where I am right now.
From what I've read, the clutch coil rarely goes out, but the clutch air gap is a known and easily fixed problem.
If that is your problem, I just ordered (online) a brand new Motorcraft clutch (w/o the coil) from Tousley Ford for about $35, and took this approach only so I can set my used clutch aside as an emergency spare for my other two 7.3's.
I have some schematics, but they're on my other laptop at home and I can;t access them from where I am right now.
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 27
Likes: 0
Is the air gap OK between the clutch and the clutch plate? If it gets too wide from wear (and I'm sure you already know this, but am only commenting on the rare chance you don't), you can see the exact same symptoms as the day heats up. Reducing the shims to obtain minimum air gap without engaging the clutch 100% of the time might be a simple fix for you.
From what I've read, the clutch coil rarely goes out, but the clutch air gap is a known and easily fixed problem.
If that is your problem, I just ordered (online) a brand new Motorcraft clutch (w/o the coil) from Tousley Ford for about $35, and took this approach only so I can set my used clutch aside as an emergency spare for my other two 7.3's.
From what I've read, the clutch coil rarely goes out, but the clutch air gap is a known and easily fixed problem.
If that is your problem, I just ordered (online) a brand new Motorcraft clutch (w/o the coil) from Tousley Ford for about $35, and took this approach only so I can set my used clutch aside as an emergency spare for my other two 7.3's.
Pete....I did not know about the air gap. Thanks for pointing that out. Like I said, the differences between auto and residential a/c are just enough to make me feel like a rookie...lol
The compressor I installed is a re-man. It's about a year old. Any chance that it could have been shimmed wrong at the factory?
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Pete....I did not know about the air gap. Thanks for pointing that out. Like I said, the differences between auto and residential a/c are just enough to make me feel like a rookie...lol
The compressor I installed is a re-man. It's about a year old. Any chance that it could have been shimmed wrong at the factory?
The compressor I installed is a re-man. It's about a year old. Any chance that it could have been shimmed wrong at the factory?
Posting Guru
Joined: Jul 2008
Posts: 1,736
Likes: 0
From: Dalton,Ga
beyond this I ain't much help.There is a screen that goes into one of the lines going into "the heater box". That was my issue (it was stopped up) and I was having the same problem..Mine is an 03 not sure about the 01
Trending Topics
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 27
Likes: 0
Those are all great ideas and I appreciate the input. I checked the compressor and sure enough, it was cycling on and off on a very regular basis. Almost like the low pressure switch was kicking in and out.
I jumped around the switch and still had the same problem. I also rechecked my pressure readings and all were ok when the compressor kicked on considering the cab temp was about a brazillion degrees....hot day in HTown
The air gap looked to be quite a bit over twenty thousandths when the compressor was sitting still. I'm getting the gap gauges and I'll check that tomorrow.
Again guys....thanks for the help.
A special shout out to Pete. That pdf is a one stop shopping bonanza. Thanks alot!!
I jumped around the switch and still had the same problem. I also rechecked my pressure readings and all were ok when the compressor kicked on considering the cab temp was about a brazillion degrees....hot day in HTown
The air gap looked to be quite a bit over twenty thousandths when the compressor was sitting still. I'm getting the gap gauges and I'll check that tomorrow.
Again guys....thanks for the help.
A special shout out to Pete. That pdf is a one stop shopping bonanza. Thanks alot!!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Tried updating and posting some wiring schematics from the Ford OEM Wiring Manual last night, but was having trouble connecting to the FTE server.
The attached PDF has all the schematics for Auxiliary A/C, Factory-installed A/C, and EATC (automatic controlled Electronic Air Temperature Control), so you should be able to find anything you need from these. If you need more details, I can get them when I get back home tonight (unless I can connect to my AlldataDIY accounts which were also not working last night).
Oh... the attached file is from the 2002 year model Wiring Manual, but it should be exactly the same for your 2001.
The attached PDF has all the schematics for Auxiliary A/C, Factory-installed A/C, and EATC (automatic controlled Electronic Air Temperature Control), so you should be able to find anything you need from these. If you need more details, I can get them when I get back home tonight (unless I can connect to my AlldataDIY accounts which were also not working last night).
Oh... the attached file is from the 2002 year model Wiring Manual, but it should be exactly the same for your 2001.
Thread Starter
|
Freshman User
Joined: Sep 2010
Posts: 27
Likes: 0
Alright....I went in with the handy dandy pdf that Pete provided and reshimmed the clutch plate.
I'll be damned but that did the trick.
I had forgotten how cold the a/c is in my truck.
Once again, this site rocks and probably saved me another few hundred dollars in repair costs.
You guys rock
I'll be damned but that did the trick.
I had forgotten how cold the a/c is in my truck.
Once again, this site rocks and probably saved me another few hundred dollars in repair costs.
You guys rock
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Thanks for letting us know how it worked out. I just received my new A/C clutch and pulley earlier this week, and hope to put them in tomorrow. Since I have two other 7.3's, I'll just keep the ones I take out as emergency spares.
Thread
Thread Starter
Forum
Replies
Last Post
Gasurffish
Cooling, Heating, Ventilation & A/C
1
Nov 26, 2005 01:01 PM
