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Old 3rd February 2021, 10:05   #11
SD1too
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Hi Ivan,

Good work! Three of your brushes definitely need replacing but I would do the fourth as well.
Quote:
Originally Posted by beavis View Post
Does the brush cable need to be insulated from the brush holder?
No. The brush, its cable and the holder will all be at the same potential.

The "red-ish little guy" is a capacitor, most likely for interference suppression. You'll see that there's one soldered between the red positive supply and earth. Arctic's library of useful photographs confirms that your motor needs only one capacitor. The leads on the loose one don't look as if they've ever been soldered to anything. I'm inclined to believe that this little red fellah climbed in during factory assembly and has been snoozing there ever since!

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Old 3rd February 2021, 10:07   #12
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Quote:
Originally Posted by SD1too View Post


Vitesse is quite right that you won't need a set of four, more likely one or two. The material used isn't given on the German website. I see that a pair costs €18.42. What's their delivery charge to Ivan in Bulgaria Mike?

Simon
Postage to Sweden from Germany, and I imagine Bulgaria would be the same, was 3.5 Euro for 4 brushes.

Not pretty pictures, looks like an overheating problem, not sure but is that a wire break to the commutator too?

Keep well
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Old 3rd February 2021, 11:10   #13
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Ivan don't forget this is the wrong fan for your car anyways, so maybe air on the cautious side as to rebuilding the fan, clean all the dust of the board with a brush, so we can se if any burning as occurred.

The commutator as been worn down a little but could still be cleaned up, as long as all the coiling is intact, below is what the V6 fan should look like four wires 3 speed.

Unless it is a two wire 2 speed fan with resistor.

control box v6
1

K 18 control box.
2

Brushes four wire 3 speed fan.
3

Two wire 2 speed fan brushes with resistor.
4


You will note from the brush board below that there are two capacitors for the 1.8 set up, one one side and the other where yours is.

5

6

7
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Old 3rd February 2021, 12:19   #14
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Quote:
Originally Posted by Arctic View Post
You will note from the brush board below that there are two capacitors for the 1.8 set up, one one side and the other where yours is.
Hi Steve,

How is the second capacitor connected please on the 1.8 board (3 wire, without resistor)? I can only see one present in all three of your pictures.

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Old 3rd February 2021, 12:47   #15
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Looking at the pictures from Arctic, the 2nd capacitor links the two outer pins (post 13 last picture). This is not present on the OP's pictures (post 10 pic 1) and hence the OP found it loose within the casing.
Even if the brushes are replaced on this motor with out this component refitted/replaced it will not work correctly
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Old 3rd February 2021, 13:39   #16
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Quote:
Originally Posted by stocktake View Post
Looking at the pictures from Arctic, the 2nd capacitor links the two outer pins (post 13 last picture).
Hello Dave,

Yes, in Arctic's first picture of the 1.8 3 wire board I see a capacitor between the outer terminals. I don't see a second capacitor in this or any of Arctic's subsequent pictures.

I could be wrong because it's hard to tell from photographs. Hopefully Ivan can help.

Dave; you say that the motor will not work correctly without this capacitor. Why do you say that?

Simon
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Old 3rd February 2021, 14:31   #17
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Arctics photos showing the two components

[IMG][/IMG]
[IMG][/IMG]

Beavis photo showing one
[IMG][/IMG]
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Old 3rd February 2021, 15:02   #18
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Hello!
Tomorrow I’m meeting a friend of mine with technical skills to properly clean and review the entire thing. He will be able to refit the loose component. I hope from the pictures he will get the idea where to fit it.

After that I will post update. But still I will have 3 cable 2 speed fan without the golden resistor. Will see.

I’ve been offered a second hand 4 cable 3 speed fan with kv6 control box but the computer of my mechanic is currently showing only 2 speeds testing option. Not sure if I install the 3 speed fan with kv6 control box it would work correctly.
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Old 3rd February 2021, 15:11   #19
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A good used 3 speed fan with the right control box (three relays) might be a better option - you can easily test all three speed yourself if you get Toaf. Even without the programme you can bench test the three speeds.

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Old 3rd February 2021, 16:01   #20
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Quote:
Originally Posted by stocktake View Post
Arctics photos showing the two components ... Beavis photo showing one ..
Thank you very much Dave; in shadow, but definitely there!
Quote:
Originally Posted by beavis View Post
But still I will have 3 cable 2 speed fan without the golden resistor.
2 speeds isn't a problem Ivan. MG Rover latterly fitted a 2 speed system to the KV6. The only differences are that (1) yours has no resistor which is a better design in my opinion and (2) the 1.8 fans are lower powered (do you use the air con. a lot?).
Quote:
Originally Posted by beavis View Post
Not sure if I install the 3 speed fan with kv6 control box it would work correctly.
It is compatible with your car but being second-hand it too will have worn brushes. The question is, how long will they last?
You can test a 3 speed system without diagnostic tools as follows. Press the windscreen demist button to test the slow speed. Bridge the yellow/grey and black wires on the air con. trinary switch to test the medium speed. You'll need the engine running for both. You can't test the high speed but as it relies upon the low and medium speeds to be working that doesn't matter. You can be confident that the high speed will work if low and medium are.

Simon
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Last edited by SD1too; 3rd February 2021 at 16:04..
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