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I can't see that it does as by the time you get to the pistons they are =
completely separate circuits, however perhaps one should still bleed the =
longest front circuit first (the difference between the rears is =
probably only a few inches in several feet). I can't really see why it =
has to be done anyway. Some places talk about air bubbles passing the =
shortest circuit when bleeding the longest, so if the shortest has =
already been done it could leave bubbles in there. But that can happen =
regardless of which you are doing, and once you have bled the first =
circuit (longest or shortest) there shouldn't be any bubbles in that =
circuit. It's perhaps more relevant to stop-start bleeding with the =
pedal where fluid and hence bubbles could be moving back and fore, less =
so with continuous pressure such as EeziBleed.=20
I've never done it, but I'd imagine pedal bleeding is a bit of a pain on =
a dual circuit as a 'good' circuit i.e. no air should be limiting how =
far the pedal can move when bleeding the one with air in.
There is also the question of the balance switch. I understand that on =
the earlier unboosted system the switch will always be tripped, and =
careful re-bleeding of first one circuit then another may be needed to =
centralise it again. With the boosted system the switch can be =
partially unscrewed to stop it latching. But then again will =
low-pressure bleeding such as with an EeziBleed on just a few psi be =
enough to cause the shuttle to move anyway?
PaulH.
----- Original Message -----=20
On vehicles with independent front and rear brake hydraulic =
circuits, is it still advisable to bleed the longest pipe run first? =
That is, does it matter if one bleeds the front brakes first?
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<DIV><FONT size=3D2>I can't see that it does as by the time you get to =
the pistons=20
they are completely separate circuits, however perhaps one should =
still=20
bleed the longest front circuit first (the difference between the =
rears is=20
probably only a few inches in several feet). I can't really =
see why=20
it has to be done anyway. Some places talk about air bubbles =
passing the=20
shortest circuit when bleeding the longest, so if the shortest has =
already been=20
done it could leave bubbles in there. But that can happen =
regardless of=20
which you are doing, and once you have bled the first circuit (longest =
or=20
shortest) there shouldn't be any bubbles in that circuit. It's =
perhaps=20
more relevant to stop-start bleeding with the pedal where fluid and =
hence=20
bubbles could be moving back and fore, less so with continuous pressure =
such as=20
EeziBleed. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I've never done it, but I'd imagine pedal bleeding =
is a bit of=20
a pain on a dual circuit as a 'good' circuit i.e. no =
air should=20
be limiting how far the pedal can move when bleeding the one with =
air=20
in.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>There is also the question of the balance switch. I =
understand=20
that on the earlier unboosted system the switch will always be tripped, =
and=20
careful re-bleeding of first one circuit then another may be needed to=20
centralise it again. With the boosted system the switch can be =
partially=20
unscrewed to stop it latching. But then again will low-pressure =
bleeding=20
such as with an EeziBleed on just a few psi be enough to cause the =
shuttle to=20
move anyway?</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV><FONT size=3D2></FONT><BR></DIV>
<DIV dir=3Dauto> On vehicles with independent front and =
rear brake=20
hydraulic circuits, is it still advisable to bleed the longest pipe =
run first?=20
That is, does it matter if one bleeds the front brakes=20
first?</DIV></BLOCKQUOTE></BODY></HTML>
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