Hi Erik
I would be very surprised if adding servo system would alleviate screeching
brakes as a servo just assists by applying additional pressure. Screeching is
normally associated with uneven wear or contamination (obviously not the case
with your completely new set). It could be misalignment though - either the
calliper being offset or the disc not running true. One other thing though -
are you getting full stopping power?- It's highly unlikely, but if the brakes
are only being pushed a small distance then the pads would rub the disc and not
actually grab it. I f this is the case, them the fault could lie with the
master cylinder. I'm not an expert in car brakes at all - although I have
stripped and rebuilt my '87 Morgan's and a few others over the years. I do
strip, bleed, rebuild Mountain Bike hydraulic brakes on a regular basis. I also
service the cars that my wife's business uses (these use a single circuit,
single disc and calliper off a moto scooter) and although simpler and smaller
the principles (and fixes) are the same.
Did the brakes screech before the rebuild? If so when was the last time that
they didn't screech? Was it prior to the car standing for a long period? Are
you sure that the cylinders are moving evenly - even after the calliper
rebuild? Is there any play in the road wheel relative to the calliper?
I really don't think that fitting a servo will solve the problem. Look
elsewhere for the cause. The servo is there to aid your right leg! (or left one
if you're driving really fast)!!
Best regards
David
David Ashworth
Director
Klarus Consulting Limited
Email: enquir...@klarusconsulting.com
Tel: +44 (0) 7810 155714
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On 2 Jun 2012, at 18:57, Erik Andresen wrote:
Hi Andy
It is my hope that this will solve the problem of screeching brakes.
I have new discs, brake pads and repair kit for calipers.
And of course a better braking power.
The MMC servo assist from later cars, is this to a single circuit braking
system?
Erik
On 02/06/2012 07:46 Andy Garlick andy.garl...@yahoo.com wrote:
Erik
Why do you feel you need a brake servo?
The light weight of the +4, and its powerful brakes are more than capable of
slowing the car down without one. Even the racers do not use servos on +4s ,
+8s are another matter due to their heavier mass, and faster approach speeds.
The best solution would be to use the MMC servo assist from the later cars (
the master cylinder and servo are all one unit, and the sizing is correct
for a Morgan) . Using a separate servo means plumbing it in on the bulkhead .
However I would try a later car with servoed brakes before you embark on the
this conversion, I don't think you will get much benefit. If you can
generate enough pedal pressure to lock the front brakes , you don't need a
servo.
Andy
From: Erik Andresen mor...@7295.dk
To: mogtalk2 mogtalk2@listbox.com
Sent: Friday, 1 June 2012, 17:13
Subject: [mogtalk2] Brake servo unit on a +4
Hi all.
I have a Morgan +4 with a TR4A engine from 1966. Does anyone have experience
with changing the brake system with a brake servo unit.
Regards Erik
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