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06-21-11, 01:45 PM
OK so I recently bought a set of Tektro Auriga Comp brakes second hand. They had a sticking piston so I took the pads out, wedged the working piston shut and pumped out the stuck piston to clean the sides when it popped out. It came out enough so that it was at an angle with fluid dripping out before I quickly pressed it back in with a tyre lever.
Now obviously when the lever is pressed it goes right down the handlebars and nothing happens. I have a bleed kit so I will bleed the brakes, and carefully this time clean and lubricate the edges of the pistons.
The concern I have is that online people talk about damaging the piston seal, when the piston popped out it did not have a seal attached, is this fixed inside the calliper?
Also how would I know if the seal was damaged and how would it become damaged by the piston popping out?
If I can help it I would rather just bleed the brakes and clean and lubricate the pistons by partially pumping them out.
Is this sensible? If I did want to check the condition of the seals then how would I do this?
Before anybody mentions it I would rather not take them to the LBS as I bought them second hand it would not really be worth the cost.
Now obviously when the lever is pressed it goes right down the handlebars and nothing happens. I have a bleed kit so I will bleed the brakes, and carefully this time clean and lubricate the edges of the pistons.
The concern I have is that online people talk about damaging the piston seal, when the piston popped out it did not have a seal attached, is this fixed inside the calliper?
Also how would I know if the seal was damaged and how would it become damaged by the piston popping out?
If I can help it I would rather just bleed the brakes and clean and lubricate the pistons by partially pumping them out.
Is this sensible? If I did want to check the condition of the seals then how would I do this?
Before anybody mentions it I would rather not take them to the LBS as I bought them second hand it would not really be worth the cost.