Today's Message Index:
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1. 06:07 AM - Re: Hydraulic Brake System Master Cylinder (Brian Carpenter)
2. 11:54 PM - Re: Hydraulic Brake System Master Cylinder (aerosiam)
Message 1
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| Subject: | Re: Hydraulic Brake System Master Cylinder |
Hugh,
I have bled brakes on my 2006. The small pin hole seems to just be an overf
low. If I put too much Dot 3/4 in it overflows out the small pin hole when
tightening the top onto the master cylinder. I do not have the other hole w
ith set screw you mention. If you are replacing all fluid I found it easier
to fill from the bottom up, both sides at the same time. Method requires t
wo small pump cans with plastic hose over the brake nipples.. Worked better
for me..
-I cannot see and reason for this..Except- maybe another way to add flu
id instead of removing the screw top of the cylinder?????
=0AGood luck,
Brian N3081x
Taylor Az
928-205-8300
--- On Mon, 4/11/11, Hugh McKay <hgmckay@bellsouth.net> wrote:
From: Hugh McKay <hgmckay@bellsouth.net>
Subject: Allegro-List: Hydraulic Brake System Master Cylinder
=0A=0AI am bleeding the brake system on my Allegro 2000. I notice that on t
op of =0Athe small master cylinder there is a pin size hole, and a larger b
ut still small =0Ahole with a threaded set screw. Can any one tell me the f
unction of these, and =0Aare they used in any way during the bleeding proce
ss?=0A-=0AHugh G. =0AMcKay III, P.E.
Senior Consultant
Worldwide Engineering Inc.
4090 North =0ANC Hwy. 16
Denver, NC 28037
Ph. 704-661-8271
Fax =0A704-483-5466
email =0Ahgmckay@bellsouth.net
http://www.wwegeo.com
Message 2
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| Subject: | Re: Hydraulic Brake System Master Cylinder |
I agree wth Brian's comments
The pinhole is presumably the breather and can also be used to top up cleanly with
a hypodermic needle.
I replaced the disk pads and bled the system a couple of years ago. One point is
that there are TINY fluid transfer holes in the bottom of the piston which need
to be cleaned and checked. From memory, the set screw protrudes exactly between
the ears of the circlip below. If they are not lined up, the set screw will
not screw down.
Recently I renewed all the seals in the whole system but the original Evektor master
cylinder didn't feel soild so I replaced it with a Matco which works great.
The outlets are at 90 degrees to the original and the vertical mounting post
had to be elongated but otherwise it was a simple swop.
I use silicon DOT 5 because of the humidity in Thailand (and it is safe on paintwork)
Paul
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