hydraulic break

[Ajlal ahmed]

dear Team i have ebike with hydraulic break.when i apply break the bike stop accurate but my tyre still remain heavy after leaving break free.should this problem of oil break? should i change break oil? i clean pads etc but the issue is same

 

[Nealh]

Check calliper alignment against the brake rotor as one rotates the wheel, look for brake rubbing or the rotor grabbing on the disc pads.

Loosen the calliper bolts and gently apply brake lever to centralize the pads better , tighten calliper bolts and then release the lever. See if the wheel rotation frees up and inproves.

 

[Ajlal ahmed]

Check calliper alignment against the brake rotor as one rotates the wheel, look for brake rubbing or the rotor grabbing on the disc pads.

Loosen the calliper bolts and gently apply brake lever to centralize the pads better , tighten calliper bolts and then release the lever. See if the wheel rotation frees up and inproves.

yes i tried all..tyre moves freely but when i applied break it become heavy and skids there should this problem regarding break oil?

 

[Nealh]

Are the pistons free or are they sticking and not retreating in to tthe calliper correctly ?
They obviously work when force is applied but it doesn't mean they are freely retracting.

Brake oil shouldn't be an issue unless an incorrect o8il has been used.

 

[saneagle]

yes i tried all..tyre moves freely but when i applied break it become heavy and skids there should this problem regarding break oil?

I know what the problem is because I had it once. You have too much oil in the reservoir. When you appy the brake, the heat makes the oil expand and it holds the brake on until it cools down, which doesn't take long. Easiest way to sort it is to take whatever tool you need to open the filler screw. When you're on your ride, loosen the filler screw and wrap a rag around the brake to catch any oil. Do some big stops, then retighten the screw and the problem will be solved.

 

[AndyBike]

Are the pistons free or are they sticking and not retreating in to tthe calliper correctly ?
They obviously work when force is applied but it doesn't mean they are freely retracting.

As above.

Give the brakes a small service. Basically just cleaning the pistons, and lubricating them with some silicon lube

This is the very best stuff to use.

Pardon our interruption...

Failing that. Perhaps a full(ish) service involving fluid change, bleed and as above lubing the pistons.

Can I please ask what brakes these are ? Different brakes can involve different servicing procedures

 

[saneagle]

As above.

Give the brakes a small service. Basically just cleaning the pistons, and lubricating them with some silicon lube

This is the very best stuff to use.

Pardon our interruption...

Failing that. Perhaps a full(ish) service involving fluid change, bleed and as above lubing the pistons.

Can I please ask what brakes these are ? Different brakes can involve different servicing procedures

Many bicycle brake reservoirs don't have the expanding rubber bellows in them that would be there to deal with the expansion of the oil with heat. OP has filled his reservoir up to the top. He just needs to let some oil out -nothing else.