Lancia Motor Club Forum Banner
29 March, 2024, 12:24:18 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Need to contact the Forum Administrator? e-mail forum.admin@lanciamc.co.uk, for Database Administrator e-mail database.admin@lanciamc.co.uk      -      Copy deadline for Viva Lancia is 12th of each month.      -      For Events e-mail events@lanciamc.co.uk      -      To Join the club go to http://www.lanciamc.co.uk/join.htm
 
   Home   Help Search Calendar Register  
Pages: [1]   Go Down
  Print  
Author Topic: Brakes  (Read 3154 times)
0 Members and 1 Guest are viewing this topic.
Niels Jonassen
Senior Member
*****
Posts: 124


« on: 28 November, 2017, 11:36:42 PM »

Some time ago the issue of brakes was discussed, and it appeared that quite a few Aurelia owners did not know that the plunger in the brake reservoir is supposed to be up - and to stay up. Now I have looked at an internet page with 11 adverts for Aurelia, 8 B20's, 2 B24's and 1 B10. There were photos of the engine compartments of them all. On 3 photos I could not see the reservoir. On the remaining - all B20's - only one had the plunger up. They were all advertised by dealers who asked a lot of money for the cars.
Logged
lancialulu
Press Officer
Permanent resident
*****
Posts: 4902



« Reply #1 on: 29 November, 2017, 06:46:50 AM »

My newly acquired B12 had been sitting around at a dealer for some months when we decided to drive it home. The brakes worked fine on the test drive but on closer examination the plunger was down. I pulled it up and it stayed up but part way home I noticed brake fluid at the rear of the car and the plunger had dropped. I topped up the reservoir (it was half full) and pulled the plunger up the top, and it stayed up for the rest of the journey. The rear cylinders luckily had resealed them selves. Chris Gawne had warned me of this issue so I had bought a large bottle of dot4 for the journey home. It seems my car had new brakes all round. I wonder if those B20s have some expense waiting in the braking department.....
Logged

Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
Dikappa
Megaposter
*
Posts: 553


« Reply #2 on: 30 November, 2017, 06:48:10 AM »

The plunger going down is also often caused by the cylinderwall,no return valve or seal in the reservoir itself, which seems often to be neglected in a brake system rebuilt.
So with plunger down and no signs of brake fluid, best check the reservoir...
Logged
Brian Long
Senior Member
*****
Posts: 111

Aurelia B12, Flavia 2000 Coupe


« Reply #3 on: 06 December, 2017, 10:09:49 AM »

The Aurelia braking system relies on the pressure generated in the system by the spring-loaded plunger in the brake fluid reservoir to keep the cups in the master and slave cylinders in firm contact with their respective cylinder walls.
Other braking systems using slave cylinders achieved this by having a small spring-loaded valve in the master cylinder which maintained a slight positive pressure in the system when the brakes were released.
Previous contributors are right in saying that the plunger should always be up. A slow loss of plunger height means either leakage past master or slave cylinder cups or, hopefully, only past the cup in the fluid reservoir.
My B12's plunger remains in the up position indefinitely but I still check it during any extended periods of inactivity.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2021 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines
Page created in 0.038 seconds with 21 queries.