Coo look at that. Maxton 916/996 shock FS

Back-filling from the nipple with a syringe is much easier, & doesn't
run the risk of sucking air in via the M/C or caliper seals.

 

Any good workshop like what I've worked in 'ad a vacuum bleeder.

 

I've got a Mityvac, I just find a syringe easier & quicker to fill an
empty system. I still use the Mityvac for final bleeding, or changing
the fluid if I'm not draining it first.

 

Sort of. A bit like you and I, really ;-)

Oh, back to bleeding. I've got new tyres on the GPz750 (Contis: cheap
and quite good enough) and thought I'd bleed the brakes. What's the
form with the anti-dive system, because there's a bleed nipple on each
caliper and on top of each anti-dive unit and a third (per side) on
the junction box where the pipe to the anti-dive meets the brake
pipes.

I'm assuming that the pipe on the junction box is the last to be done
because it's the highest, so is the sequence caliper, anti-dive,
junction box, or what?

Tia.

 

Not as nice as antifreeze.

 

I put it to the Hon. Gent. that if the caliper seals are in such a
condition as to admit air due to the slight vacuum generated by a
Mityvac, that brake fluid would indeed piss out as soon as the brakes
are applied.

 

Logically that's the only order that would make sense. You'd need to do
the calipers first to fill the system, then the other bits to do their
respective air-traps. Bleeding a higher bit before a lower bit could
just result in air from the lower bit moving up to the higher bit
before you've had a chance to get it out.

 

Not necessarily. The seals aren't required to resist vacuum to do their
normal job. I'm not saying good seals will leak, just that it's possible
for them to seal perfectly in one direction but not the other.

I've got a Mityvac and I'm not afraid to use it.

 

I knew someone would.

I'm sure you're right, but I'm equally sure that somewhere out there
will be a dished seal that works like a piston ring. I suspect the MV
has something weird as the Mityvac point blank refuses to work on the
back brake. It'll get most of the air out, but not the last bit.

 

Just beern into Leeds to buy one, £49 is better than £70, also should make
the front easier to do....

 

'Swot I fort.

Btw, that racing car book is ace. Haven't dipped into Irving yet.

 

Good attitude. Chin up!

 

and I just found mine ;o)

 

Tockico calipers are the devils spawn, but we have a rear pedal now.

And as a bonus, i'm still alive.

 

I'll drill a hole in it & take it back for a refund

 

Rather nicer than sodium hydroxide solution, I suspect. One of the
most unpleasant experiences I've ever had.

 

On my Guzzi Quotas rear brake, a Mityvac is pretty useless: as far as
I can tell, it just sucks fluid past an air pocket. The only way to
bleed the thing is to unmount the caliper and hold it tilted up at an
angle while bleeding it.

 

Like GL1500s with the front left caliper, and rear caliper (Also on
left) operated by the pedal.

Very tricky to depress pedal while applying spanner to bleed nipple in
such a set-up.

 

That's what I have. It plugs into my air compressor and makes brake
bleeding an easy, one man, five minute job. Well worth the Aus$150 it cost.

Fraser

 

It is?!?

Ewwww!