Triumphrat

Bazzer

My new Bonneville has a slight leak from the lid of the master cylinder. The dealer took a look last friday and 're-seated' the seal, but it has continued to leak. They have now ordered a new seal. I spoke with Triumph, who claim that if the lid is tightened too much it will damage the seal and that a tech notice had gone out to the dealers to that effect.

Seems a bit lame to me. Has anyone else seen this?

TIA

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Baz

propforward

I know others have seen this - so I expect someone will chip in - mine has been bone dry.

Some blame the lid for being too flimsy - and in some ways that backs up Triumphs statement - if you tighten it too much it could bow a bit and not apply even pressure to the seal.

A common misconception with rubber seals when they leak is to go tighter and tighter, often making the problem worse.

I'd let the dealer replace the seal and go from there.......

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Rule 1: Cardio

Rustic Road Progress

CAPTDON

The master cyl on the Bonne is crap!! Its pot metal & machined very poorly! I had the samething. You can re-mill the stock cap w/some emory & a block of wood- or buy (as I did) the chrome or whatever cap you desire? I put on the chrome one & have NEVER had a leak since! It came milled as smooth as a babys ass. DONT use any sealer or whatever as that will be a problem later when you have to remove it. Besides a nice tight seal- it looks real nice! They have them in blk or many designs. There are very few that havent had some sorta leak on that POS!! Brake fluid plays hell w/ paint!! Good luck

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CAPT D

justbrian

Another tip I've always followed: just like installing an oil filer, make sure there's a bit of fluid on the seal prior to tightening it up.