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Rexton 270xdi Cooling Fan Viscous Coupling

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#31
teerex

Posted 28 February 2011 - 05:39 PM

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QUOTE (bk4t9 @ Feb 28 2011, 04:36 PM) <{POST_SNAPBACK}>
hv check my dad's Merz,yes!it's free spin,I wonder Y almost all rexy is tight,is it purposely make 2 this? smile_question.gif

Hi Bro,
Just my 2 cents worth, rexs viscous clutch fans are suppose to be slightly tight, due the working principles of silicone oil.The viscosity of Silicon oil is affected by velocity, which means that the slower the drive shaft turns, the oil becomes thicker, and thus the fan's speed follow's drive shaft. But when at high speed or velocity the oil 'jadi cair' thus freeing the fan from consuming power from the drive shaft.
As for the Mercs fan it has a bimetal spring
As for Mercs fan , the front of the housing there is a bimetal spring.When it heats up (by the air blowing warmed up by the radiator) it turns a small axe. Inside the coupling this axe moves a thin metal plate which controls the amount of silicone oil which is able to flow between the grooves. Thus hotter air results in more silicone fluid to enter the grooves resulting in a stronger connection between wheel and housing and giving a larger fan speed.


The ultimate measure of man is not what he stands for in moments of comfort or convenience, but where he stands at times of challenges and controversy.

#32
r3xt0n

Posted 28 February 2011 - 05:51 PM

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QUOTE (teerex @ Feb 28 2011, 05:39 PM) <{POST_SNAPBACK}>
Hi Bro,
Just my 2 cents worth, rexs viscous clutch fans are suppose to be slightly tight, due the working principles of silicone oil.The viscosity of Silicon oil is affected by velocity, which means that the slower the drive shaft turns, the oil becomes thicker, and thus the fan's speed follow's drive shaft. But when at high speed or velocity the oil 'jadi cair' thus freeing the fan from consuming power from the drive shaft.
As for the Mercs fan it has a bimetal spring
As for Mercs fan , the front of the housing there is a bimetal spring.When it heats up (by the air blowing warmed up by the radiator) it turns a small axe. Inside the coupling this axe moves a thin metal plate which controls the amount of silicone oil which is able to flow between the grooves. Thus hotter air results in more silicone fluid to enter the grooves resulting in a stronger connection between wheel and housing and giving a larger fan speed.


Wah.. now really speak like Technical Advisor. I read and read again also catch no ball... hahahahha

#33
rex4585

Posted 28 February 2011 - 08:27 PM

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QUOTE (teerex @ Feb 28 2011, 05:39 PM) <{POST_SNAPBACK}>
Hi Bro,
Just my 2 cents worth, rexs viscous clutch fans are suppose to be slightly tight, due the working principles of silicone oil.The viscosity of Silicon oil is affected by velocity, which means that the slower the drive shaft turns, the oil becomes thicker, and thus the fan's speed follow's drive shaft. But when at high speed or velocity the oil 'jadi cair' thus freeing the fan from consuming power from the drive shaft.
As for the Mercs fan it has a bimetal spring
As for Mercs fan , the front of the housing there is a bimetal spring.When it heats up (by the air blowing warmed up by the radiator) it turns a small axe. Inside the coupling this axe moves a thin metal plate which controls the amount of silicone oil which is able to flow between the grooves. Thus hotter air results in more silicone fluid to enter the grooves resulting in a stronger connection between wheel and housing and giving a larger fan speed.

bro if I remember correctly Rexton also has bimetallic strip. Same as Merc. My old one is with one of our KL bro. Maybe can check and confirm


#34
rx270xdi

Posted 28 February 2011 - 08:50 PM

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QUOTE (r3xt0n @ Feb 28 2011, 05:51 PM) <{POST_SNAPBACK}>
Wah.. now really speak like Technical Advisor. I read and read again also catch no ball... hahahahha



If who is technical person should understand this. You read and read and read! do you reading the correct ball...? Hahaha

#35
rex4585

Posted 28 February 2011 - 08:56 PM

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QUOTE (bk4t9 @ Feb 28 2011, 04:36 PM) <{POST_SNAPBACK}>
hv check my dad's Merz,yes!it's free spin,I wonder Y almost all rexy is tight,is it purposely make 2 this? smile_question.gif

bro tight maybe cos one is small Asian and the other large European hehehe

#36
r3xt0n

Posted 28 February 2011 - 09:17 PM

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QUOTE (rx270xdi @ Feb 28 2011, 08:50 PM) <{POST_SNAPBACK}>
If who is technical person should understand this. You read and read and read! do you reading the correct ball...? Hahaha


You know I know la, I am only good in certain balls. Have been learning a lot of you guys and also the Service Manual but have not make it a habit to read before sleep. hahahaha

#37
r3xt0n

Posted 28 February 2011 - 10:34 PM

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Uploading photos for Bro Teerex, I will let him to explain them.

1. Rexton-Viscous-Fan


2.

3.

4. Controlled Oil Flow Type


#38
teerex

Posted 28 February 2011 - 11:15 PM

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QUOTE (r3xt0n @ Feb 28 2011, 10:34 PM) <{POST_SNAPBACK}>
Uploading photos for Bro Teerex, I will let him to explain them.

1. Rexton-Viscous-Fan


2.

3.

4. Controlled Oil Flow Type

Hi Bro,
The controlled oil flow type is the one used by mercs. Whereas rex uses the other ones.Notice the black rubber ring beside the centre hole? That is the refiil hole for rex.

The ultimate measure of man is not what he stands for in moments of comfort or convenience, but where he stands at times of challenges and controversy.

#39
bk4t9

Posted 28 February 2011 - 11:52 PM

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QUOTE (teerex @ Feb 28 2011, 11:15 PM) <{POST_SNAPBACK}>
Hi Bro,
The controlled oil flow type is the one used by mercs. Whereas rex uses the other ones.Notice the black rubber ring beside the centre hole? That is the refiil hole for rex.

Bro,
Both is working in the diffrence principle,can the mercs type also use in our rexton,will it b any harm 2 the cooling system.
<P> </P>

#40
rex4585

Posted 01 March 2011 - 08:11 AM

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[quote name='bk4t9' date='Feb 28 2011, 11:52 PM' post='1677888']
Bro,
Both is working in the diffrence principle,can the mercs type also use in our rexton,will it b any harm 2 the cooling system.
[/quo
bro both Rexy and Merc same type. Believe bro r3xt0n photos are of my old Rexy's coupling and the last photo is of an unknown car, not Merc. The Merc type I fit is the same as the Rexy but by Behr. I have been using Merc without any problem. Now also with Merc fan blade