[Fot] TR6 Race Clutch Release Bearing - Hydraulic or Standard w Slave Cylinder?

[Philip Gott]

Someone mentioned brake fluid for the annular cutch throw out bearings. I had been using DOT 4 which led to the Sebring picture posted earlier by Mike Harmuth. 
The best fluid for these is the Quartermaster Hydraulic Clutch Fluid made especially for these systems. It has much better lubricity than the normal Dot 3 or DoT 4 fluids. DOT 4 is actually much worse lubricity than DOT 3. There are exceptions of course, but the safe “go to” solution is the Quartermaster fluid.
Since using that we have had no issues 🤞.  And no black residue in the bottom of the master cylinder reservoir.
Phil Gott

Sent from my iPhone

> On Aug 19, 2024, at 11:02 AM, Tony Garmey via Fot <fot at autox.team.net> wrote:
> 
> I machine up a clutch release bobbin to accept a 44 mm release bearing that is suitable for the 71/4 Tilton
> Stock hydraulic cylinder.
> Sent from my iPhone
> 
>> On Aug 19, 2024, at 6:43 AM, yellow04 via Fot <fot at autox.team.net> wrote:
>> 
>> +1 on keeping the clutch release stuff stock.
>> 
>> I will add if you don't overtighten the hardened taper pin and safety wire it, they work fine. Adding an additional bolt or roll pin to keep the fork fixed to the cross shaft is the belt and suspenders approach. I do that with my street cars where a gearbox pull requires a bunch of work removing interior bits, but the race stuff gets pulled often enough that I simply put a new tapered pin in every time.
>> 
>> Henry
>> 
>>>> On 2024-08-18 22:05, Mark Cook via Fot wrote:
>>> So, I one of my TR6s has a close ratio transmission with Mcleod
>>> hydraulic release bearing, which is leaking.  While there, trying to
>>> decide on whether to go back to a stock bearing, yoke etc, with an
>>> external slave cylinder.  For reference, as part of the engine
>>> rebuild, going with the Racetorations Arrow billet crank, 7 1/4"
>>> lightweight flywheel, cover and four paddle clutch disc.
>>> Not keen on having to remove the transmission for seal leaks related
>>> to the hydraulic release bearing.  At the same time not familiar
>>> enough to know if a hydraulic release bearing's failure rate is any
>>> worse than a standard release bearing.  Everything I have read makes
>>> the hydraulic bearing seem more sensitive to initial set up as well.
>>> Thoughts?
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