Sorry, another bleedin' question

[silentwitness]

OK, so with the weather being absolute pants today I was going to replace the brake fluid in my 02 adventure.

Can I check with you guys I'm going to do it right.... I was going to connect hose to bleed valve and put into jar with fluid in. Take off the fluid cover, lightly pull in the lever whilst cracking the bleed valve until the fluid runs to about 1/2 full. Close the bleed valve, top up with new fluid. Go round again, until the new fluid comes out.

Is this correct, or am I missing something? Will that not effect the ABS system?

Thanks

 

[Steptoe]

OK, so with the weather being absolute pants today I was going to replace the brake fluid in my 02 adventure.

Can I check with you guys I'm going to do it right.... I was going to connect hose to bleed valve and put into jar with fluid in. Take off the fluid cover, lightly pull in the lever whilst cracking the bleed valve until the fluid runs to about 1/2 full. Close the bleed valve, top up with new fluid. Go round again, until the new fluid comes out.

Is this correct, or am I missing something? Will that not effect the ABS system?

Thanks

has the bike got servo brakes ?

Don't leave the top off the reservoir when you pull the lever - it'll squirt everywhere -

Are you using a vacuum pump - if not you'll have to pull the lever quite a few times to empty the reservoir , it doesn't just flow out like a tap -

 

[silentwitness]

Yes it has servo brakes. No I'm not using a vacuum pump.

Cheers

 

[Steptoe]

Yes it has servo brakes. No I'm not using a vacuum pump.

Cheers

Servo brakes aren't normal to bleed - you MUST read up on them -

there are different circuits to bleed - you bleed the mastercylinder reservoir from the servo unit- not the caliper -

then you bleed the other circuits one at a time -

If you've never bled normal brakes before, then don't touch servo brakes - or you'll be sorry

 

[silentwitness]

Sorry my bad... It doesn't have servo brakes. I think they started in '03, is that correct?

Bleeding went fine anyway, didn't take long at all. Might get a vacuum pump for next time though.

Cheers

 

[Copper Slip]

Sorry my bad... It doesn't have servo brakes. I think they started in '03, is that correct?

Bleeding went fine anyway, didn't take long at all. Might get a vacuum pump for next time though.

Cheers

Servos and brake circuits have been fitted to motor cars for flippin years, bikes are no different you just need to be able to service the circuits in the right sequence and hey presto youve avoided paying a mechanic loads..............and its good fun its not rocket science..........get to know yer bike..........cheers

 

[littleredrooster]

Servos and brake circuits have been fitted to motor cars for flippin years, bikes are no different you just need to be able to service the circuits in the right sequence and hey presto youve avoided paying a mechanic loads..............and its good fun its not rocket science..........get to know yer bike..........cheers

Come on then, spill the beans......

 

[Steptoe]

Servos and brake circuits have been fitted to motor cars for flippin years, bikes are no different you just need to be able to service the circuits in the right sequence and hey presto youve avoided paying a mechanic loads..............and its good fun its not rocket science..........get to know yer bike..........cheers

but the BMW bike servos are electric, and bear no resemblance to standard car servos - if you try and bleed the brakes in the normal way ( as per haynes manual etc), you'll empty the servo unit of fluid, but not the master cylinder .
It is simple to bleed servo units , but you have 8 bleed nipples, and wheel, servo and master cylinder circuits to bleed - and you have to fill up the servo unit as well as the master cylinders -
To make it easier, you can use the servo motor to help bleed/pump the fluid.

 

[Mouse]

If you are only changing the fluid in the wheel circuit, surely you don't need to bother with all the servo bleed valves? You just add fuid to the servo reservoir and bleed at the caliper, right?

And, I'm assuming, that to change the fuild in the control circuit, you'd again only need to bleed from one point - all the extra bleed points are just to get air out of the servo circuit. If you are just changing fluid without draining the system, there won't be any air.

Am I right here?