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> A/c Compressor Replacement, Need to replace the compressor
trident
post May 20 2008, 11:27 AM
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I am replacing my A/C compressor this week, and in preparation, have purchased the compressor, the drier, the expansion device, the o-rings for each of these items, as well as the fitments for the oil cooler and transmission cooler for the radiator.

My trusty Hayne's manual..ugh... says that it is necessary to remove the radiator to remove the compressor. Is this the case? Additionally, what should I look out for when replacing each of these A/C items? I am aware of how well the drier works, and that it should be replaced just before going to my local shop to have the system evacuated and filled.

I am looking for advice on special tools I may have to acquire, seals that need to be replaced that I may not have considered, etc... If there is a post that already deals with compressor replacement, please point me in that direction. I have searched a while, and have been unable to find one.

Thanks for all your help!
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Guest_Volgrrr_*
post May 20 2008, 07:28 PM
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QUOTE(trident @ May 21 2008, 03:27 AM)
My trusty Hayne's manual..ugh... says that it is necessary to remove the radiator to remove the compressor.  Is this the case?
[right][snapback]80388[/snapback][/right]

Firstly, let me establish that we are actually discussing an 850 Volvo here and referring to the Haynes Volvo 850 service and repair manual.

If this is correct then I certainly cannot find where the Haynes 850 manual state it is necessary to remove the radiator to remove the A/C compressor.

In point of fact, the Haynes manual expressly states that if the A/C system is worked on, this work must be done by a specialist i.e. except for sensors and peripheral devices. The manual does state, if necessary, the compressor can be unbolted and moved to one side without disconnecting the refrigerant unions.

Sorry I can't be any help with your problem but, in all fairness to the poor old Haynes manual (which doesn't enjoy a stellar reputation within the Volvo community), I felt it necessary to point out that incorrect statements like yours don't aid the manual's credibility.



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ampangbear
post May 20 2008, 07:35 PM
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QUOTE(trident @ May 21 2008, 12:27 AM)
I am replacing my A/C compressor this week, and in preparation, have purchased the compressor, the drier, the expansion device, the o-rings for each of these items, as well as the fitments for the oil cooler and transmission cooler for the radiator. 
[right][snapback]80388[/snapback][/right]



Wow, ALL in one BANG, huh? I'm surprised you didnt say anything about the indash evaporator/cooling coil... Or having it at least serviced, after these many years, mold would ahve built itself up in there and all.



QUOTE(trident @ May 21 2008, 12:27 AM)
My trusty Hayne's manual..ugh... says that it is necessary to remove the radiator to remove the compressor.  Is this the case?  Additionally, what should I look out for when replacing each of these A/C items?  I am aware of how well the drier works, and that it should be replaced just before going to my local shop to have the system evacuated and filled. 
[right][snapback]80388[/snapback][/right]


I have never tried replacing it yet, so i apologise if i cannot be of much help. But i think i know why Haynes wanted you to remove the radiator. The SPACE, to work with your tools. It would be almost impossible to wiggle your spanner in there to unscrew any bolts.



QUOTE(trident @ May 21 2008, 12:27 AM)
I am looking for advice on special tools I may have to acquire, seals that need to be replaced that I may not have considered, etc...  If there is a post that already deals with compressor replacement, please point me in that direction.  I have searched a while, and have been unable to find one.
[right][snapback]80388[/snapback][/right]


Why dont you write one?
With pictures, too, so it would be easier for people to fathom.
:)

Cheers, dude, and all the best to you.
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trident
post May 21 2008, 09:05 AM
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Volgrr,

I noticed from your signature that you hail from Australia. I'm not sure if Haynes prints different versions for different countries, but mine is Haynes North America. In any case, in section 3-11, compressor removal/replacement, step 8, it plainly states that it is necessary to remove the radiator.

As far as who can work on the A/C system, the only thing a trained technician has that I don't is a reclaimer and a vacuum/charging system. The task of evacuating and charging the system I will leave to a "professional". As far as the grunt work of changing parts is concerned, I'll be the grunt.

Ampagbear (sp?) made a good point about space availability. That was the only reason I saw for radiator removal. I was posting to this forum to see if anyone had the experience to verify if this truly was the case.

I certainly would not like anyone to have inferred that the Haynes manual is inaccurate. I have simply found that it usually lacks critical information that would make planning easier.

In any case, I re-iterate, regardless of what the Haynes manual says, if anyone has any experience replacing the compressor, I would appreciate some insight. I will do my best to remember to take pictures as I replace the compressor in an effort to put together a DIY topic.

Oh yeah... sheesh, I've broken into the evaporator in my old Prelude, and that is not a task I would be looking forward to again. I also believe that servicing the mold issues on the evaporator can be handled independently of internal line work. Mold accumulates on the external fins. It may be easier to do this work with the evaporator out of the car, but I just don't have that kind of time.

I'm only replacing the compressor because the clutch is bad and cannot be repaired by re-shimming.

Thanks for all your help!
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Guest_Volgrrr_*
post May 21 2008, 07:59 PM
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QUOTE(trident @ May 22 2008, 01:05 AM)
Volgrr,

I noticed from your signature that you hail from Australia.  I'm not sure if Haynes prints different versions for different countries, but mine is Haynes North America.  In any case, in section 3-11, compressor removal/replacement, step 8, it plainly states that it is necessary to remove the radiator.
[right][snapback]80576[/snapback][/right]

My sincere apologies trident,

My Haynes Manual is only 2 years old and it doesn't have a part 11 - it finishes at Chapter 3, Part 10.

I also cannot find any reference to when it was published however the front cover states it is for 1992-1996, J to P registration, petrol vehicles.

It looks like Haynes must have updated their manual (or as you have indicated, publish a different edition for the American market).

And I would totally agree with you the Haynes manual lacks critical information that would make many jobs much easier.

Once again please accept my apologies.







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ampangbear
post May 21 2008, 09:31 PM
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Yeah, using Haynes alone is not enough.

I use Haynes, Chiltons and on top of that, VADIS (to visualise the kinda work expected.
:)

Cheers, guys...
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porteous
post May 22 2008, 10:59 AM
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Compressor is much easier to get to after you pull the dryer. Getting the lines off the dryer is very diffucult and requires enexpensive release tools. I drop the front of the subframe (I am a Volvo tech) for additional clearance but can be done without if you have a good assortment of wiggle socket and ect.
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trident
post May 22 2008, 11:39 AM
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so if you drop the subframe, can you avoid removing the radiator? Is dropping the subframe more difficult than pulling the radiator?
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owenmpk
post May 22 2008, 07:18 PM
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I replaced the compressor in my 1996 850 GLT last summer and all I had to remove was the radiator fan. I think I took it out from below but I am not sure. It was not very difficult.
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ampangbear
post May 23 2008, 02:08 AM
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Removing the radiator FAN is OK, but it would have been a whole lot easier to take it out from the top. Because of the 'locking' holes at the radiator and the PS pump hoses and all. The radiator itself, however, is easier to take out from the bottom.


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Guest_Volgrrr_*
post May 25 2008, 07:13 AM
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QUOTE(trident @ May 23 2008, 03:39 AM)
so if you drop the subframe, can you avoid removing the radiator?  Is dropping the subframe more difficult than pulling the radiator?
[right][snapback]80740[/snapback][/right]

My A/C compressor seized a short while ago and the garage (non Volvo) removed the radiator to remove the compressor.

However, their work soon packed it in (the start of a real horror story) and another compressor was installed - this time by an accredited Volvo workshop.

The Volvo garage took the compressor it out without removing the radiator - I think they removed the fan shroud and drier and brought the compressor up past the back of the headlight.



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trident
post May 27 2008, 09:06 PM
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I replaced the compressor today. Didn't have too much trouble, but I didn't have time to take pictures. Sorry. You don't need to remove the radiator, just the fan. Hopefully there won't be any leaks when I take it to the shop tomorrow to get the system evacuated and charged. Thanks to everyone who provided input.
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ampangbear
post May 27 2008, 10:30 PM
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Thanks for sharing, Trident.
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john s
post Jun 7 2009, 07:51 AM
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Greetings,
To add to this year-old thread, I'm in the process of replacing my '95 850 Turbo's compressor. My Haynes manual mentions removing the radiator. No doubt that the radiator fan/housing must be removed to give you some working room, but ... I didn't remove the radiator. Not doing so reduced my working room, and I risked slipping with the wrench and bashing the soft radiator core area. I've removed and re-installed it without any mishaps, so, it is possible to do it without removing the radiator itself. I had to remove the receiver/dryer, though to make enough room to slide the old compressor out (from the under-side) and the new one in. I added an ounce or so of PAG oil (100 viscosity) to the suction port of the replacement compressor (a used one I salvaged from another 850 that I parted out)and am evacuating the system right now, preparing to recharge it. One question - the Haynes manual says the amount of oil one should add should equal the amount drained from the old one. I didn't get any oil out of the old one (it had been drained already), so I added 1 ounce just in principle.
- js, aka Digimon-ATX
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adam242
post Jun 5 2010, 11:22 PM
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I know this is an old thread, I just wanted to add my two cents worth in the hopes it will help someone..

I found this through a google search as I was researching doing the job for a friend. She has a '95 850, non-turbo that the AC clutch went out on, throwing the serpentine belt.

Did the job today in about 3 hours. I was able to do it by removing the radiator fan assembly only, leaving the receiver/drier, radiator and everything else in place. No need to unbolt the subframe, either.. didn't even have to put the car up on jackstands.

The rear bolts are a cinch after disconnecting the lines, the front bolts are a bit of a challenge to get to. The upper one requires a socket/ratchet combination of just the right width, given the proximity of the framerail and other pulleys. The lower one can be accessed through the wheel well with a Snap-On swivel socket and an extension. Once all four bolts are out, the compressor can be removed from the top.

I replaced the seals and she's going to have the system evacuated and charged soon. Hopefully she'll have working AC again!
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