We had a similar problem !
Finally tracked it down to having a length of old Aeroquip line that was
pulsing under pedal pressure. We replaced the line and eliminated the
problem !
Gil
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Saturday, April 21, 2007 8:13 AM
Subject: Re: [F500] Pumping the Brakes
In a message dated 4/21/2007 5:46:23 A.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
<<<So my understanding is that if you need to pump the brakes to get good
stopping power, the first thing to check is bleeding the system. If that
doesn't help, is there anything else I should be looking into, or just
keep trying
to perfect my bleeding technique?>>>
The other most-likely reason for needing to pump the brakes is that the
pads
are getting pushed back into the caliper, away from the disk. This can
be
caused by several things; warped rotors, bad bearings, axle flex, loose
caliper mount, sticking caliper slide, etc. If the second pump is firm,
this is
the issue. Normally, if the brakes need bleeding due to air in the lines
or
bad fluid, the pedal will feel soft even after you've started to get
brake
action.
I've found that even in the best-prepped cars, I'll tap the brakes once
lightly towards the end of the long straights to get the pads pushed back
closer
to the rotors, which will eliminate excessive pedal travel. If you've
ever
watched in-car footage of the top road racers, they all do this. However,
if
you have excessive pedal travel, you need to find out where the system is
moving and get it tied down.
MM
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_________________________________
________________________________
FormulaCar Magazine - A Proud Supporter of Formula 500
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Subscribe Today! www.formulacarmag.com or 519-624-2003
_________________________________
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