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tryanasaurus 03-14-14 09:21 AM

Integrated TT brake lever sticking
I have a HED corsair TT aerobar. The rear brake lever will not return after braking. I removed the cable and housing and it still sticks so I assume it's the pivot? or something internally? Should I just replace the pivot or is there something else I should consider?

fietsbob 03-14-14 10:00 AM

Got the sales receipt? consider returning it.

Andrew R Stewart 03-14-14 10:06 AM

Let me use my third eye to look at your brake lever for a minute... OK I see the problem.

Really. How can we help you other then to describe the process of figuring things out? You say that you've removed the cable and still the pivots sticks. First are you talking about the brake caliper pivots of the lever's (your OP isn't real clear on this point)? Without a cable in the system it should be easy to see which (lever or caliper) is sticking. But many aero routed cables have bends and tight fits that hamper the cable's smooth and friction free movement and some have the casing seating into the lever body needing a specific casing end cap, so don't discount the cable completely until it's condition is confirmed. Assuming you are finding that the lever's pivot is tight you need to see if this is the case all the time or only when the lever is, say, mounted in the bar and tightened down. Or only when the cable is attached. Some of these TT levers have a nut and bolt with plastic bushings acting as the lever pivot and some are riveted in place. If the lever is sticking on this pivot assembly then I'd try some gentle wiggling/prying action (like loosening a tight link) between the lever and it's body. Of course a drop/dab of lube helps. Some of these TT levers have a return spring (aiding the lever's return as often there's greater cable friction) and these springs can get miss positioned or can jam up in the pivot.

One has to look at the system as a whole then as the separate parts and confirm each parts functions. When a problem is found then one has to work that part in a number of different states to see what makes it work properly and what makes it not work. Then one has to try an action to correct the not working state and see what happens.

Of course one could always just replace the lever and be done with really thinking. Andy.

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