Right, I have been under the car, I have checked I have the tools and can undo the bolts holding the Haldex 5 pump to the diff and also remove the refill plastic thing.
I have the proper Volvo oil to :-)
I am still not 100% sure how to clean the pump when removed from the car. I have some cotton buds and new rag. Is it ok to spray/use brake cleaner like in this Video?
https://www.youtube.com/watch?v=R4mb-e-3R7M
Thank you.