How Do I remove A/C Compressor from V70 D5?

[rik007]

Hi can anyone point me in the right direction for help re taking out the AC Compressor from my V70 D5 2006?

I found a few links to .pdf's but the didn't seem to work/

How found there is a 13v pulse to the compressor every 5 seconds or so, but the clutch isn't engaging so it looks like taking it out and popping on a new coil ring?

Any guidance appreciated.

With thanks, Richard.

[XC70Bob]

There should not be a pulse , when the compressor is required to run you should just have battery voltage on the clutch feed wire,

before you go removing the compressor I would try just connected a feed to the the clutch feed wire and see if the clutch pulls in.

[rik007]

Ahh is this it.....?

https://www.youtube.com/watch?v=akDULorQYfk

[Roy V70 850]

It may be worth checking the coil on the electromagnet. Remove the connector and put a multimeter (set to ohms) across it. It should read about 4 ohms. Although I doubt that would be the problem. It sounds more likely to be the clutch plate gap and CheshireD5 has an excellent video of how to put shims in to reduce the gap. From the comments on this forum I believe that the gap is too wide if you can fit a credit card in there.

I am confused when you talk about a pulse though. The magnet is usually engaged for about 6 secs every minute, although that will vary dependant on the outside temperature. I suppose you could argue that is a long pulse.

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2004 V70 D5 163bph

[Tentontimmy]

When you say the clutch isn't engaging, is this all the time or mainly when the engine is warm?

If the latter, then I second what Roy says above: the compressor clutch probably requires a re-shim. Over time, the mating surface of the clutch wears and the clearance becomes too great for the clutch to engage, particularly when the engine is warmed up.

I had the re-shim done on my D5, it solved the problem immediately.

[rik007]

Thanks I'll go and put a 12v feed to the power wire.

Apologies for the delay in replying ... work, family etc always seem to get first dibbs :-)

Rich

[rik007]

The 'pulse' I detected with a multimeter was on the power wire. With then engine running and a probe to earth it would show 13v or so every 5 - 10 seconds from memory.

I wondered whether this pulse type voltage was the way the car kept the compressor engaged but as it's a simple coil to pull the clutch on it is I have to say a bit odd as the clutch would continue to engage then disengage.

I'd have thought I'd see a continuous 12v+ feed to the power wire?

Rich

[rik007]

On second thoughts perhaps the pulse is correct live for a few seconds every minute may be what it was doing. I'll check again.

Also will check the ohms on the coil.

[rik007]

Will also check the gap re credit card width. And see if its a re-shim jobbie.

[XC70Bob]

I still think you feed to the clutch should be on at 12V when ever the A/c calls for the compressor to run.

If you look at the diagram



clutch high light in yellow

the clutch is feed directly from a relay , it would never be good practice to drive a relay for a pulsating signal , you would soon burn out the contacts.

You could remove the relay and put a test light across the terminals 1 & 2 to see if the signal from the climate control was steady or pulsing.

If its steady then I would suspect the relay is failing.