Sue Franklin Posted February 13, 2019 Report Share Posted February 13, 2019 Last year replaced both Slave and Master cylinders on our Stag. Master let go at Bristol M5 on the way back from Shelsley Walsh - tribute to hubby who drove it back to South Brent in gear and into local garage where it shuddered to a halt. Better in the autumn but on first run this year, clutch not good again and got worse through 60 off mile drive. Guess air getting in somewhere? Now ordered braided hoses just in case, but ideas welcome. Both slave and master were new units. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 13, 2019 Report Share Posted February 13, 2019 hi Sue Stag TR and 2000 use the same design cross shaft to operate the throw out , inside the hsg. is the throw out lever its held on the shaft with a nasty threaded dowel pin which shears after some use the result is a progessive loss of clutch as the dowel fails and allows the shaft to move relative to the throw out arm rimmers sell an supposed uprated dowel heres some clues ,its very common problem http://www.buckeyetriumphs.org/technical/clutch/ClutchShaft/ClutchShaft.htm and pete Link to comment Share on other sites More sharing options...
Nick Jones Posted February 13, 2019 Report Share Posted February 13, 2019 Pete is correct about the cross-shaft being prone to issues, but does the clutch seem to "recover" when cold? If so, you are on the right track with the braided hose as the OE nylon thing gets soft when hot and balloons a little leading to lost motion. Even small amounts of air in the system make matters worse and they are a right sod to bleed. That Lockheed master cylinder is a horror. I finally successfully bled my PI by taking the slave cyl off clamping the piston fully in and holding it above the level of the M/C whilst bleeding. That did it.... Nick Link to comment Share on other sites More sharing options...
thescrapman Posted February 13, 2019 Report Share Posted February 13, 2019 If you are lucky (well actually unlucky) you can feel when the cross shaft bolt has failed. with the slave push rod disconnected you can pivot the operating lever, it will have a 2-stage feel,to it if pulled back and forth and the pin has broken. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 13, 2019 Report Share Posted February 13, 2019 Im am also a great believer in hang slaves up ended and pistons push fully back Pete Link to comment Share on other sites More sharing options...
Sue Franklin Posted February 14, 2019 Author Report Share Posted February 14, 2019 The in-house expert husband reckons it is air every time. No difference hot or cold. Not a Lockheed apparently. Better each time when bled but I'm not going to spend this year just hoping the dratted thing behaves! He reckons the cross shaft thingy is OK. Thanks for the suggestions guys. Now got braided hose from Paddocks so he's going to try that. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 14, 2019 Report Share Posted February 14, 2019 we had one of the red hydraulic pipes om trucks , and yes it swells when hot under pressure braided is still a flexible in woven sheath possibly not much of an improvement, you cant beat a solid bit of pipe but if the slave is giving 5/8 to 3/4" of travel/stroke and the clutch wont clear then its dowel is going ivè recon'd 2 big boxes last year both had fractured dowel bolts , unkown to the drivers , but finding with the dowel removed you cant shift the lever off the shaft due to the remains of the failed end locking it in place, this little sad is a pain in the butt. pete Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now