Changing fan motor on Eberspacher D2

[pcatterall]

I’ve played around with these heaters for years now and, usually, have just been able to swap the whole fan unit around by canabalising other heaters. With the old type ECUs I usually had a couple of redundant heaters to steal parts from.

I now find that it would be useful to get inside these units, mainly because I have one motor that squeaks but otherwise seems good, another where the air intake has been broken but the fan is good and another with a good intake and a U/S fan ( the one in the photo).
I’d like to find out where the squeaky mouse is in one and swap the other two around.
I cant see how to dismantle the fan from the assembly without brute force but I know people are doing this and even changing the bearings in the fan.
I can see one possibility and that is connected with the black insert under the fan which appears to have 4 notches inviting some sort of key type tool, but using my long nosed pliers as keys didnt budge anything so I gave up on that one.

Any ideas chaps please!!?

 

[pvb]

Does this picture help at all?

 

[Cardo]

A most interesting thread. Apologies, I can't shed any light, but I would be interested in the outcome.

 

[pcatterall]

Does this picture help at all?

Yes it helps!! Great picture. Looks like the black disc ( lower right ) has slots at the back and can be turned to release. Looks also that I must pull the brown 'fan/disc' off a the rear as well. many thanks.

 

[captainboo]

I have read somewhere that at least one of the discs may be glued to the shaft of the motor. It also mentioned heating may help to soften the glue but don't be surprised if the disc breaks!

As per this link:

http://www.letonkinoisvarnish.uk/Eberspacher_Blower.html

 

[pcatterall]

Thanks guys, sorted!
The brown blower fan has to come off. Mine released from the splined shaft with gentle leverage all the way round. The 3 (torx headed) screws are behind this, release them and the motor unit just pops out from the front.
That was all I needed to do as I really just wanted to use the alloy housing. The motor itself looks like it will dismantle from the front by bending back the 3 tags which secure the black plastic cover in place.
Cheers