Discussion
Just asking for an opinion,the seals in my clutch master cylinder are failing on an annual basis,I am about to fit another one,that will be the 3 rd in 3 years.I have been told that synthetic fluid destroys the seals,as far as I'm aware DOT4 & DOT 5 are both synthetic and I have used both.I have read that mineral based fluid is used in several motorcycles,anyone aware of this and is it advisable to use it in the Cerb? It appears difficult to obtain.
Also I have read somewhere about silicon fluid,anyone know anything about it?
Also I have read somewhere about silicon fluid,anyone know anything about it?
Edited by esso on Wednesday 5th March 09:15
I have looked on the land rover forums.
I cannot find references to failure of seals and they were using dot 4 and early ones dot 3.
The problem with the cerb must be over stroking or maybe the angle the clutch pedal pushes the piston rod? I doubt heat affects the clutch master more the slave and connecting hoses. Definatley worth investigating a land rover setup.
Are you using a good quality master?
I cannot find references to failure of seals and they were using dot 4 and early ones dot 3.
The problem with the cerb must be over stroking or maybe the angle the clutch pedal pushes the piston rod? I doubt heat affects the clutch master more the slave and connecting hoses. Definatley worth investigating a land rover setup.
Are you using a good quality master?
I am in exactly the same situation.
When I bought my '01 4.5, I asked the sales point to fit a new clutch as I had read that there were problems in general. That clutch lasted over 40K.
I had my first problem and replaced the Master from Merlin and replaced the Slave Seals. I recharged the system with 5.1.
My second problem occurred in less than 10k. There was debris in the Master reservoir so I replaced the seals in there and replaced the Slave with one from RG. I also replaced the Clutch Pack as three fingers were broken.
Julian had raised a thread mentioning the problems that might occur due to incorrectly adjusted pushrods so I paid particular attention to this on the rebuild. I recharged the system with 4.0 this time.
I have done less than 10K again and have problems. Checked the Master Res and there was some (although smaller in 'bit' size) debris again.
There has to be a basic problem with the system.
Given the length of service I got when rebuilt by a dealer I can only think that I am doing something wrong when I do it. Goodness alone knows what though.
If there is no problem with Rover fitments then could it be summat to do with the heat levels inherent in the Cerb setup ?
Mr Clutching-at-Straws (again !)
When I bought my '01 4.5, I asked the sales point to fit a new clutch as I had read that there were problems in general. That clutch lasted over 40K.
I had my first problem and replaced the Master from Merlin and replaced the Slave Seals. I recharged the system with 5.1.
My second problem occurred in less than 10k. There was debris in the Master reservoir so I replaced the seals in there and replaced the Slave with one from RG. I also replaced the Clutch Pack as three fingers were broken.
Julian had raised a thread mentioning the problems that might occur due to incorrectly adjusted pushrods so I paid particular attention to this on the rebuild. I recharged the system with 4.0 this time.
I have done less than 10K again and have problems. Checked the Master Res and there was some (although smaller in 'bit' size) debris again.
There has to be a basic problem with the system.
Given the length of service I got when rebuilt by a dealer I can only think that I am doing something wrong when I do it. Goodness alone knows what though.
If there is no problem with Rover fitments then could it be summat to do with the heat levels inherent in the Cerb setup ?
Mr Clutching-at-Straws (again !)
I am using original fitment Girling master cylinders and using the original pushrod so I cannot see how it can be overstroked, besides,wouldn't that break the fingers? Tried a Land-Rover part,they don't fit, the thread for the hydraulic pipe is a different size.
Edited by esso on Wednesday 5th March 18:20
Jhonno said:
They do fit.. I have one! You need a little adapter for the thread difference and to swap your pushrod over.
How long have you had it fitted to your car? Have you found that it performs any better than the original master-cylinder? I realised a adaptor was required when I tried to fit a LR part but wasnt sure of the thread sizes required and at the time could not find a source for them.
Edited by esso on Thursday 6th March 16:19
Is it the seals or the master cylinder you are changing? I personally wouldn't change the seals on either slave or master, I would change the whole unit. Yes you can over stroke the master, as the pedal stroke is adjustable, you can't over stroke the slave, but it has been known to snap the fingers.
DOT 5.1 is synthetic, and personally isn't needed or any good. Good quality dot 3/4 will be fine, I've put CL Racing fluid in mine, same as the brakes.
Darren
DOT 5.1 is synthetic, and personally isn't needed or any good. Good quality dot 3/4 will be fine, I've put CL Racing fluid in mine, same as the brakes.
Darren
Vee8ight said:
Is it the seals or the master cylinder you are changing? I personally wouldn't change the seals on either slave or master, I would change the whole unit. Yes you can over stroke the master, as the pedal stroke is adjustable, you can't over stroke the slave, but it has been known to snap the fingers.
DOT 5.1 is synthetic, and personally isn't needed or any good. Good quality dot 3/4 will be fine, I've put CL Racing fluid in mine, same as the brakes.
Darren
Cheers Darren,DOT 5.1 is synthetic, and personally isn't needed or any good. Good quality dot 3/4 will be fine, I've put CL Racing fluid in mine, same as the brakes.
Darren
Very informative
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