Brake lever not springing back.

[Coyote]

Tried filling my buckets brake's with fluid. Only problem is the fluid isn't flowing through from the reservoir to the brake line and the lever doesn't spring back. Is the master cylinder buggered? Should I steal my 400's for the time being (want it going by this weekend)?

[FJRider]

Take the reservoir and lines(with lever) off and give them a good clean out.

[Coyote]

Take the reservoir and lines(with lever) off and give them a good clean out.

Will do. They do look like they need it.

I'm assuming CRC is what I should use? Is it OK getting it inside the brake line or best avoid doing that?

[FROSTY:Me]

Will do. They do look like they need it.

I'm assuming CRC is what I should use? Is it OK getting it inside the brake line or best avoid doing that?

Dude please tell me that was a PT.
Do NOT use an oil based cleaner near ya brakes or you're up for a big bill replaceing fucked seals n stuff.
Before panicking --Have you tried cracking the banjo on the resevoir?
Dito the banjo down on the caliper.
Sometimes ya get a bllody great air bubble just sits there and it wont shift for love or money. Crack the joint and it starts to move again

[imdying]

What Frosty said... CRC is fatal on braking system components.

[boomer]

Did you make sure the return spring was in place...

[xwhatsit]

Did you make sure the return spring was in place...

Do disc brakes need that? I've got a drum, which needs a return spring, but don't hydraulic disc brakes do it by itself?

[Coyote]

Dude please tell me that was a PT.
Do NOT use an oil based cleaner near ya brakes or you're up for a big bill replaceing fucked seals n stuff.
Before panicking --Have you tried cracking the banjo on the resevoir?
Dito the banjo down on the caliper.
Sometimes ya get a bllody great air bubble just sits there and it wont shift for love or money. Crack the joint and it starts to move again

No it wasn't a PT. You're not born knowing everything.

Did try cracking both, but worth a shot again. What should I be cleaning it with?

Did you make sure the return spring was in place...

Since I haven't pulled it apart yet I was naturally assuming everything was still there.

[FJRider]

Will do. They do look like they need it.

I'm assuming CRC is what I should use? Is it OK getting it inside the brake line or best avoid doing that?

Compressed air thru (after you disconnect them) the lines usually cleans any shit out. The lever's piston often sticks if left unused for a while...They're simple to pull apart/put back together.

[FJRider]

Clean with CLEAN, DRY, SOFT, cloths...... NO cleaning fluids.
Compressed air gun at a servo station.

[Coyote]

Compressed air thru (after you disconnect them) the lines usually cleans any shit out. The lever's piston often sticks if left unused for a while...They're simple to pull apart/put back together.

Haven't got compressed air at home put I do at work. I'll take the line round tomorrow. The brakes haven't been used in a while, I'll pull them apart tonight.

[imdying]

Gotta go home now, but basically, you've got to prime the master cylinder, because it won't pump air (like how they pack an oil pump when assembling a motor). Bleed the master cylinder before hooking the hose up, then bleed the lines, then connect them to the calipers and bleed as per normal. Never found a bike I couldn't bleed.

[Coyote]

I'll use an old dish towel. Servo station is a bit of a walk away and it's wet. Guess it wouldn't hurt...

I remembered the one trick I was shown to fill up the calliper before putting it on the bike to make sure there's no air sitting in it. Makes sense to do it to the master cylinder.

[quallman1234]

Geeze man, your a bit like me. Make easy thing's look hard, Ask skunk or Glen about my mechanical skills. . Im getting better tho.

[mouldy]

use brake clean its fine on seals etc , odds on master cylinder is full of gunk at the end of the piston travel , pull off banjo and try pushing it back with something otherwise stirp and clean