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Unread 05-20-2013, 05:16 PM   #1
angry_trucker
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1998 FSJ Cherokee 
 
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Ac compressor & siezed clutch analysis

So after "jumping" the switch as seen here:
I arrived to the conclusion, that the clutch is seized, since the clutch plate inside the pulley wouldn't spin...
Today I decided to take the clutch plate off to see what is in there...

I pried the plate off by using 2 screwdrivers and a lot of swearing...
The plates are a bit rusty, but don't look too bad...
I sprayed bunch of brake parts cleaner to get the clutch dust out of there and wiped everything clean...

When I put it back on, I didn't realize, that when the plate came off it dropped under the Jeep and a little washer/spacer came out...this made the clutch plate spin, because now there was no space in between the plates...
I took advantage of this and tried to run the AC with it spinning, but still no cold air...

Would it be reasonable to assume that based on my description of events, not only the clutch is seized, but it is also low on freon?

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Unread 05-21-2013, 08:31 PM   #2
Afdude88
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Uh, yeah. That or your compressor is shot.

1993 Grand Cherokee Limited 4.0L AW-4
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Unread 07-03-2013, 09:32 PM   #3
StPaul59
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After jumping the AC with the paper clip method, is it ok to leave the paper clip in there as a temperary fix until I figure out why the compressor isnt kicking on... Which could be a long time
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Unread 07-03-2013, 10:56 PM   #4
StPaul59
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Anybody?
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Unread 07-03-2013, 11:02 PM   #5
jm8881
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It is not ok to leave the jumper in there. That switch is there for safety reasons.
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Unread 07-04-2013, 03:04 AM   #6
Uniblurb
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Agree not a good idea to leave that jumper in there. I'd make sure your horn works and then switch your horn relay with your AC relay in the PDC. If clutch clutch/compressor still doesn't kick on it not that hard/pricey to put a can or 2 of 134a, one with UV dye, in there. Autozone and/or Advance has loaner sets of manifold gauges you can borrow to get the pressure correct.
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-Stalling ZJ? 12 things to check before replacing a sensor; the Dirty Dozen
-Crankshaft position sensor multimeter test. & video of testing.
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Unread 07-04-2013, 08:13 AM   #7
StPaul59
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Thanks! I'll get some r134 in there. Relays work fine...
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Unread 07-04-2013, 10:29 AM   #8
Uniblurb
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No problem and the way the loaner manifold gauge deal works is you pay full price for the gauges ($100-$150), can keep for 90 days, and return for a full refund. Some just buy a can of 134a with the hose/gauge attached but I don't trust those gauges and those things are pricey. You can buy a brass valve for using on just the can for $10-$12 then connect it right to the middle suction line on the manifold gauge set. I also bought a pair of yellow glasses with UV pen light set at Autozone for $11 so you can see where the UV dye is coming out easily. But if the leak's in the evaporator in the dash sometimes you can see the dye come out of the drain tube/frame, quite a job to replace, and I've done 2.

I just replaced most of my AC parts, did the evaporator a couple years ago, and thought I got a heck of a deal at carparts.com. Brand new Denso AC compressor was $200 and Denso accumulator (filter/dryer) with hoses attached was $70. Know that seems like a lot of $ but real high-quality parts. Depends on how bad you want AC if your compressor is toast. Maybe not as hot/humid up in MN as it is here and I need AC! Good luck!
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96 4.0 ZJ Laredo, 2004 4.7L WJ Limited, 93 4.0 XJ (spare), 96 4.0 XJ (son's)

-Stalling ZJ? 12 things to check before replacing a sensor; the Dirty Dozen
-Crankshaft position sensor multimeter test. & video of testing.
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Unread 07-04-2013, 12:30 PM   #9
StPaul59
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Quote:
Originally Posted by Uniblurb View Post
No problem and the way the loaner manifold gauge deal works is you pay full price for the gauges ($100-$150), can keep for 90 days, and return for a full refund. Some just buy a can of 134a with the hose/gauge attached but I don't trust those gauges and those things are pricey. You can buy a brass valve for using on just the can for $10-$12 then connect it right to the middle suction line on the manifold gauge set. I also bought a pair of yellow glasses with UV pen light set at Autozone for $11 so you can see where the UV dye is coming out easily. But if the leak's in the evaporator in the dash sometimes you can see the dye come out of the drain tube/frame, quite a job to replace, and I've done 2.

I just replaced most of my AC parts, did the evaporator a couple years ago, and thought I got a heck of a deal at carparts.com. Brand new Denso AC compressor was $200 and Denso accumulator (filter/dryer) with hoses attached was $70. Know that seems like a lot of $ but real high-quality parts. Depends on how bad you want AC if your compressor is toast. Maybe not as hot/humid up in MN as it is here and I need AC! Good luck!

It gets pretty warm here! I put a can of r134 in there and it took the whole can to get it somewhat cold and the compressor kicks on without the wire I had shoved in there. The gauge is on the middle half of the green, so a little more should make it colder. I might look into a more accurate gauge but for now I am doing the happy dance and the moon walk!
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Unread 07-04-2013, 12:41 PM   #10
jm8881
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Start looking for leaks, mine worked great for about 2 days but then didn't have the pressure to work after that.
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Unread 07-04-2013, 01:52 PM   #11
Uniblurb
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Quote:
Originally Posted by StPaul59 View Post
It gets pretty warm here! I put a can of r134 in there and it took the whole can to get it somewhat cold and the compressor kicks on without the wire I had shoved in there. The gauge is on the middle half of the green, so a little more should make it colder. I might look into a more accurate gauge but for now I am doing the happy dance and the moon walk!
Good deal and glad it's working now! Hope it holds up and like was just mentioned look for leaks. My AC compressor was still working but one of the reason's I replaced it was because was leaking out of the front seal which became progressively worse and couldn't find a way to get it repaired. POS NAPA Cold Power compressor I paid $300 for and started leaking 2 months out of the 1-year warranty. Both the local NAPA and Cold Power wouldn't do crap so they lost all of my business!
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-Stalling ZJ? 12 things to check before replacing a sensor; the Dirty Dozen
-Crankshaft position sensor multimeter test. & video of testing.
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Unread 07-04-2013, 06:55 PM   #12
ZeeJay1997
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I've added one can of freon in mine in the last 15 years. On a 100* day, max air, you could hang meat in 20 minutes.

looking for some wood to knock on...
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Unread 07-05-2013, 04:40 AM   #13
coralman
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I've been looking at a delphi for 200, denso still offers the V8 comp,but not the one for the 6. Delphis ususally go for 260 up I think. Mopar only has rebuilt.
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Unread 07-05-2013, 10:17 AM   #14
Uniblurb
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Strange coralman that I was able to find a Denso AC compressor for my 96 4.0 a couple months ago but can't find a Denso which fits a 97-98 4.0. Found one for a V8 but not the 4.0 as you said.

One lucky dude Zee in not having any AC problems! Stay cool and I'll also knock on wood for you.
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96 4.0 ZJ Laredo, 2004 4.7L WJ Limited, 93 4.0 XJ (spare), 96 4.0 XJ (son's)

-Stalling ZJ? 12 things to check before replacing a sensor; the Dirty Dozen
-Crankshaft position sensor multimeter test. & video of testing.
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Unread 07-05-2013, 12:20 PM   #15
coralman
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Have you seen under Zee's hood? A lovebug wouldn't land on that stuff cause its too clean. I'll bet he doesn't have any rust on the accumalator.
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