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A/C motor


 
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mgstr



Joined: 14 Sep 2020
Posts: 17
Location: Bodmin

PostPosted: Thu Apr 22, 2021 20:29    Post subject: A/C motor Reply with quote

Hi everyone, a few questions,  I need some fluid for the a/c motor. Does anyone know what it is and how much capacity. What is the difference between single and dual systems. Thanks Mike
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PostPosted: Thu Apr 22, 2021 20:29    Post subject: Google Ads keep this community free to join!


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andyman



Joined: 08 Dec 2012
Posts: 5601
Location: Penrith

PostPosted: Thu Apr 22, 2021 21:20    Post subject: Reply with quote

Hi mgstr, this https://www.amazon.co.uk/Aircon-Conditioning-Topup-Recharge-Refill MAY be what you need, assuming your system is just a bit low on pressure. Because the Delica's system is dual (ie there are separately controllable (zonal) systems for front and rear), it reguires far more liquid refrigerant gas than these kits hold: 1.5L or kg rings a bell. If your aircon is not working at all, you would be advised to take it to an aircon specialist to find out if/why the system is empty. They can pressure test your system, and insert a dye to discover where any leaks are. Often, leaks are in the compressor seals, which dry out and shrink. If the leak is small enough, and not a split or hole in any metal parts, they may first flush the system to get rid of any water/ condensation in it, then put in PAG oil, which can rejuvenate the seals, retest (possibly not the same day), and if all is good, refill your system with the required amount of refrigerant. Kwik-fit used to a good deal on this, apparently.
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andyman



Joined: 08 Dec 2012
Posts: 5601
Location: Penrith

PostPosted: Thu Apr 22, 2021 21:25    Post subject: Reply with quote

Sorry, this https://www.amazon.co.uk/Aircon-Conditioning-Topup-Recharge-Refill/dp/B00JVVUQR6/ref=sr_1_4?dchild=1&keywords=AC+Recharge+Kit&qid=1619122928&sr=8-4
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mgstr



Joined: 14 Sep 2020
Posts: 17
Location: Bodmin

PostPosted: Fri Apr 23, 2021 10:32    Post subject: A/C motor Reply with quote

Thanks Andyman, I was looking for the actual oil that is in the motor. It is off the car at the moment and green fluid came out of it, so I thought it would be good to change it.
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Lewis
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Joined: 25 May 2006
Posts: 16291
Location: Huddersfield

PostPosted: Fri Apr 23, 2021 13:05    Post subject: Reply with quote

If it is off the vehicle then, legally, it should have only been removed by an Approved person, just like gas systems, and must also be tested for leaks etc by one after refitting.

Considering the costs involved then it makes better economical sense to let the engineer refill the system, after you have reassembled it.

NB: Being illegal to release the refrigerant gasses into the air, you didn't actually do anything to it yourself, other than notice it was leaking!  Rolling Eyes
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JimmyG



Joined: 20 Jul 2017
Posts: 65
Location: Thessaloniki, Greece

PostPosted: Fri Apr 23, 2021 20:39    Post subject: Reply with quote

I have a list of capacities etc, provided many years ago by a Mitsubishi main dealer for Shogun 91-99, which I have used for reference.

Compressor Oil Grade ND Oil-8,  80ml + or - 20.

Last time I asked about lubrication of the compressor, I was told that the equipment which they use these days for charging with A/C Refrigerant automatically adds the oil. I cannot verify if this is the case. Personally, I would recommend leaving the job to a qualified technician. There are serious safety and environmental considerations.

With the dual system, leaks can occur in the rear pipes (for example where they are clamped behind brackets), and the sub-condenser under the floor by the side door is vulnerable to corrosion/damage. I have experienced both these failures, and not dried out O-rings.....yet. If you are overhauling the complete system, it is recommended that to fit a new Receiver/Dryer.

I've only just noticed that Refrigerant Capacities for 4M40 Engines and non-4M40 Engines (presumably the Petrol variants) are different. I have no idea why this might be, unless they run different compressors. Again, I think that the current generation of gassing equipment may be able to judge the pressure in the system and charge accordingly.

Single 4M40 500-550g
Dual 4M40 850-900g
Single (others) 600-650g
Dual (others) 1000-1050g

Good luck, and take care.
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sir naggedalot



Joined: 07 Sep 2010
Posts: 204
Location: Southampton

PostPosted: Sun May 02, 2021 22:52    Post subject: Reply with quote

You can pressure test with nitrogen first and then refill.
I wouldn't worry about the Pag oil to much. You can run em with residue and they will still work fine 💯👍
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Soulman
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Joined: 01 Sep 2009
Posts: 638
Location: Bedfont, Middlesex

PostPosted: Thu May 06, 2021 0:07    Post subject: Reply with quote

If you want it to work properly take it to a specialist, the green stuff that came out is the dye they put in the system to find leaks. If it's a dual system then according to the manual it requires 240 ml of SUN PAG 56 and 950 g of R134a if it's a single system then it requires 180 ml of ZXL 100PG and 650 g of R134a.
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