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AOC Haldex 3rd gen. How to open it?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

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Metallo
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AOC Haldex 3rd gen. How to open it?

Post by Metallo » Tue May 19, 2020 3:01 pm

Hi there,

Has anybody been able to open the Haldex for repair?

Any way to remove the black plastic cover?

Image

Thank you!
Alex
Polar 940 Turbo SW - 1997
XC 70 AWD 2.5 - 2005
XC 70 AWD 2.5 - 2006

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Re: AOC Haldex 3rd gen. How to open it?

Post by - Pete - » Wed May 20, 2020 7:20 am

They do come apart, I have not tried (yet) but I do have 2 old pumps I need to (attempt to) rebuild. A member in the XC90 forum did a write up on the AOC pump tear down a little while ago. I’ll try to find it.
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Re: AOC Haldex 3rd gen. How to open it?

Post by Metallo » Wed May 20, 2020 7:26 am

Hi Pete,

I appreciate your help, I was unable to find any write up about this on the Internet or in this forum, but sometimes is not easy to find what you want, we may use different wording.
Thanks again for your help!

Alex
Polar 940 Turbo SW - 1997
XC 70 AWD 2.5 - 2005
XC 70 AWD 2.5 - 2006

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Re: AOC Haldex 3rd gen. How to open it?

Post by - Pete - » Wed May 20, 2020 8:21 am

I have come across some good info using translator. Most of it seems to come from Russia/Ukraine/Czech Republic.

I have a bunch of Haldex/AOC threads saved somewhere but here’s the one I was referring to earlier.

viewtopic.php?f=10&t=93479
2001 V70XC 146k
2004 V70 AWD 141k
2004 V70R M66 144k
2004 XC70 287k
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Metallo
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Re: AOC Haldex 3rd gen. How to open it?

Post by Metallo » Wed May 20, 2020 8:41 am

Thank you Pete, I will check it out and see if I find any useful hint on how to open that thing.

Alex
Polar 940 Turbo SW - 1997
XC 70 AWD 2.5 - 2005
XC 70 AWD 2.5 - 2006

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Re: AOC Haldex 3rd gen. How to open it?

Post by greffel » Wed May 20, 2020 1:43 pm

To remove the pump did you remove the cardan
shaft and exhaust ?

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Re: AOC Haldex 3rd gen. How to open it?

Post by - Pete - » Wed May 20, 2020 1:48 pm

Exhaust isn’t mandatory to remove, but you must free at least the rear CV joint on the driveshaft from the oscillation damper on the AOC/Haldex input. After that, must remove oscillation damper itself. Some cars had a shallower oscillation dampers & it was possible to remove just the rear CVJ. Others had a deeper cup to the oscillation damper & it was mandatory to free the front CVJ from bevel gear output flange first before freeing rear CVJ. All XC’s I’ve seen have the deeper cup. My VR has the shallow cup.
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Re: AOC Haldex 3rd gen. How to open it?

Post by XC70Rider » Wed May 20, 2020 8:58 pm

As Pete said you don't need to remove the exhaust to access the Haldex. I let the exhaust hang a foot and rested the muffler on a jackstand. The downpipe between manifold and CAT is robust and can take a good bend. I have the deep oscillation damper so had to remove the CV joint from the front bevel gear first.

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Re: AOC Haldex 3rd gen. How to open it?

Post by greffel » Thu May 21, 2020 1:32 pm

If I only want to do a oil and filter change, is the filter changeable without removing anything else?

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Re: AOC Haldex 3rd gen. How to open it?

Post by - Pete - » Thu May 21, 2020 1:58 pm

No, removing the flange must be done first, but you can change the filter without pulling the pump.
2001 V70XC 146k
2004 V70 AWD 141k
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