T
tommyintpa@aol.com
Guest
Hi all, The following is just a part of a posting to another list I subscribe
to. Based across the pond this guy is like the Bilgemaster, Dave the Wave and
the Splash King sortta rolled into one. A military vehicle guy who is
respected as the man that has a real understanding of how his vehicles work.
Read and learn.
Richard post the following -
"Hydraulics can be a pain though, invariably people are too
gentle. ? If you simply open the slave nipple, operating the pedal just
pushes
air out and then draws it in again.
Here's what I do that has never failed yet to cure "unbleedable" cars that
people have brought round in desperation after days and quarts of pumping to
no
avail.
You have to be brutal and fast, gentle pedal pumping just has the fluid flow
around the air bubbles but doesn't sweep them out.
Here's what you do on anything, clutch or brakes, Stalwarts, cars, Land
Rovers,
you name it.? Get plenty of fluid to hand be it hydraulic oil or brake fluid
as
appropriate to the vehicle, get another reasonably astute helper.? We do
assume
though that the master cylinder seals are correctly fitted and good, and that
the stroke, if adjustable, does allow the reservoir port to be opened at
rest.
Open the bleed nipple, a lot; couple of turns at least as you want as little
resistance to flow as possible. If needs be ensure the nipple is free on its
thread as you will need to hand seat it later.? Cover any sensitive parts and
have a hose for wash-down if necessary as fluid is going to go everywhere -
I'm
thinking of cars and brake fluid vs paint here.
Have someone press one finger, moderately, as a non-return valve, over the
well
slackened nipple, watch out for fluid spray and wear eye protection if you
want.
Then kick the pedal as hard and as fast as you possibly can, I do mean kick
and
fast, you're aiming for a rate approximating a 0.5" Browning MG; it doesn't
matter if its a full stroke or not and let the pedal bang back up under its
own
return spring at its maximum speed.? Do NOT pussy-foot about.
The human one-way valve will report the feeling of sudden lumps as the air
comes
out and a very different sensation of softer aerated fluid, solid fluid is
easy
to feel at this high rate when the air is out.? Most reservoirs have the
capacity to take at least 6 hits and experience will show you how many you
can
give it before top-ups, usually your leg will give out before the fluid.?
When
satisfied that solid fluid is coming out, hold the pedal right down on the
last
stroke and have the human valve seat the nipple with two fingers whilst
keeping
the actual hole blocked, then nip it up.
So, nipple well opened, watch out for spraying fluid and give the pedal
absolute
rocks.
If I had taken bets with all those people, some accomplished mechanics, who
insisted that nothing more could be done and they'd tried every trick in the
book, I'd have retired ages ago."
Richard
STAL II 894
20ET51
-Solent Area MVT-
http://www.solentmvt.co.uk
- Well I hope someone learned something, I did, THANKS RICHARD, Tommy in
Tampa
[Non-text portions of this message have been removed]
to. Based across the pond this guy is like the Bilgemaster, Dave the Wave and
the Splash King sortta rolled into one. A military vehicle guy who is
respected as the man that has a real understanding of how his vehicles work.
Read and learn.
Richard post the following -
"Hydraulics can be a pain though, invariably people are too
gentle. ? If you simply open the slave nipple, operating the pedal just
pushes
air out and then draws it in again.
Here's what I do that has never failed yet to cure "unbleedable" cars that
people have brought round in desperation after days and quarts of pumping to
no
avail.
You have to be brutal and fast, gentle pedal pumping just has the fluid flow
around the air bubbles but doesn't sweep them out.
Here's what you do on anything, clutch or brakes, Stalwarts, cars, Land
Rovers,
you name it.? Get plenty of fluid to hand be it hydraulic oil or brake fluid
as
appropriate to the vehicle, get another reasonably astute helper.? We do
assume
though that the master cylinder seals are correctly fitted and good, and that
the stroke, if adjustable, does allow the reservoir port to be opened at
rest.
Open the bleed nipple, a lot; couple of turns at least as you want as little
resistance to flow as possible. If needs be ensure the nipple is free on its
thread as you will need to hand seat it later.? Cover any sensitive parts and
have a hose for wash-down if necessary as fluid is going to go everywhere -
I'm
thinking of cars and brake fluid vs paint here.
Have someone press one finger, moderately, as a non-return valve, over the
well
slackened nipple, watch out for fluid spray and wear eye protection if you
want.
Then kick the pedal as hard and as fast as you possibly can, I do mean kick
and
fast, you're aiming for a rate approximating a 0.5" Browning MG; it doesn't
matter if its a full stroke or not and let the pedal bang back up under its
own
return spring at its maximum speed.? Do NOT pussy-foot about.
The human one-way valve will report the feeling of sudden lumps as the air
comes
out and a very different sensation of softer aerated fluid, solid fluid is
easy
to feel at this high rate when the air is out.? Most reservoirs have the
capacity to take at least 6 hits and experience will show you how many you
can
give it before top-ups, usually your leg will give out before the fluid.?
When
satisfied that solid fluid is coming out, hold the pedal right down on the
last
stroke and have the human valve seat the nipple with two fingers whilst
keeping
the actual hole blocked, then nip it up.
So, nipple well opened, watch out for spraying fluid and give the pedal
absolute
rocks.
If I had taken bets with all those people, some accomplished mechanics, who
insisted that nothing more could be done and they'd tried every trick in the
book, I'd have retired ages ago."
Richard
STAL II 894
20ET51
-Solent Area MVT-
http://www.solentmvt.co.uk
- Well I hope someone learned something, I did, THANKS RICHARD, Tommy in
Tampa
[Non-text portions of this message have been removed]
