Fan problems

beavis · 2nd February 2021, 17:47

Hello, I have Rover 75 v6 2.0 petrol from 2002.
My fan seems to work at high speed only. Kicking in at ~109, cutting off at ~104.
I thought that it is a three speed fan but my control box in the fan assembly has only two relays - a small and a big one. The fan has three wires.
The fan assembly doesn't have a resistor.
I'm the second owner so only God knows what has been done to it.
Am I missing the resistor? Could it be just brushes?
Photos:
"Siemens 232-65033-01"

SD1too · 2nd February 2021, 18:28

Quote:

Originally Posted by beavis

Am I missing the resistor? Could it be just brushes?

Thanks for the excellent information Ivan.

Someone has fitted a 2 speed system from an early 1.8 litre car (it doesn't use a resistor) to your V6. However it should work so I think the most likely explanation is that the earth brush has worn down to minimum.

If you're handy with a soldering iron you can buy a set of new brushes for £20 (plus postage) which is by far the most economical and satisfactory repair. Let me know if you need further details.

Simon

beavis · 2nd February 2021, 20:04

Hello Simon, thank so much for the answer!
I will try to change the brushes. I’m far from Uk so I’ll try to stock them locally.
I red that the material is M17 but the internet seems unaware what that means.
I have the dimensions so I’ll try to buy bigger once and polish them down to the correct size.
A local producer said the brushed for the car industry are normally stiffer and are made from metal-carbon or metal-graphite. I guess I’ll do what I can.

Arctic · 2nd February 2021, 20:41

Quote:

Originally Posted by beavis

Hello Simon, thank so much for the answer!
I will try to change the brushes. I’m far from Uk so I’ll try to stock them locally.
I red that the material is M17 but the internet seems unaware what that means.
I have the dimensions so I’ll try to buy bigger once and polish them down to the correct size.
A local producer said the brushed for the car industry are normally stiffer and are made from metal-carbon or metal-graphite. I guess I’ll do what I can.

HI Ivan.
You can purchase the brushes from the link below which Simon did a thread on sometime back.

https://www.ecp.co.uk/rover75-carbon-brushes.php

vitesse · 2nd February 2021, 21:16

Quote:

Originally Posted by Arctic

HI Ivan.
You can purchase the brushes from the link below which Simon did a thread on sometime back.

https://www.ecp.co.uk/rover75-carbon-brushes.php

If you don't mind getting ripped off on overseas postage, click the drop down menu and see the difference. Sorry, I know I've mentioned it before but even Simon agrees its excessive.

Regards

ps. Bought my brushes from Germany, don't have the link unfortunately

beavis · 3rd February 2021, 02:16

Quote:

Originally Posted by vitesse

Bought my brushes from Germany, don't have the link unfortunately

https://www.ecp.co.uk/electric_motors_generators.php
Looking at this page the M17 doesn’t even exists, so what material did you get it from?

malagas · 21st March 2021, 00:02

Quote:

Originally Posted by Arctic

HI Ivan.
You can purchase the brushes from the link below which Simon did a thread on sometime back.

https://www.ecp.co.uk/rover75-carbon-brushes.php

Are these the same to a Diesel 3-Speed Radiator Fan?
Thanks

stocktake · 21st March 2021, 06:09

Yes the motors and motor internals are the same, it's just the relay box that is different

2nd February 2021, 17:47	#1
beavis Newbie Rover 75 Saloon Join Date: Jan 2021 Location: Pleven Posts: 22 Thanks: 16 Thanked 3 Times in 2 Posts	Fan problems v6 2.0 petrol Hello, I have Rover 75 v6 2.0 petrol from 2002. My fan seems to work at high speed only. Kicking in at ~109, cutting off at ~104. I thought that it is a three speed fan but my control box in the fan assembly has only two relays - a small and a big one. The fan has three wires. The fan assembly doesn't have a resistor. I'm the second owner so only God knows what has been done to it. Am I missing the resistor? Could it be just brushes? Photos: "Siemens 232-65033-01" Last edited by beavis; 2nd February 2021 at 18:02..

21st March 2021, 06:09	#8
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,591 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Yes the motors and motor internals are the same, it's just the relay box that is different __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

2nd February 2021, 20:04	#3
beavis Newbie Rover 75 Saloon Join Date: Jan 2021 Location: Pleven Posts: 22 Thanks: 16 Thanked 3 Times in 2 Posts	Hello Simon, thank so much for the answer! I will try to change the brushes. I’m far from Uk so I’ll try to stock them locally. I red that the material is M17 but the internet seems unaware what that means. I have the dimensions so I’ll try to buy bigger once and polish them down to the correct size. A local producer said the brushed for the car industry are normally stiffer and are made from metal-carbon or metal-graphite. I guess I’ll do what I can.