Proper way to bench bleed the master cylinder

Maintenance advice to keep your Spider in shape.
Post Reply
bbuckl
Posts: 61
Joined: Thu Mar 10, 2011 1:20 pm
Your car is a: 1979 Spider 2000
Location: New Fairfield, CT

Proper way to bench bleed the master cylinder

Post by bbuckl »

My master cylinder just died (conveniently on a twisty downhill back road). I got a new one from AR, but I am not sure how to properly bench bleed it prior to putting it in the car. I can attach the fluid reservoir through the 2 plastic nipples on top, but how do I run the hoses out to properly bleed it? I have no other fittings except for the attachment points for the hard lines.

Thanks!

Brian
79 Spider 2000 Carb
User avatar
4uall
Posts: 4145
Joined: Mon Sep 26, 2011 12:09 pm
Your car is a: 1980 Fiat Pininfarina Spider 2000 F.I.
Location: Ottawa, Ontario, Canada

Re: Proper way to bench bleed the master cylinder

Post by 4uall »

Jay

Fiona
1980 FI 2000 Spider
ITZEBTZE

https://goo.gl/photos/eNKaX7hrXhBu9fmp6

FINN (FN-2187)
2014 Jeep Wrangler Sport
MYTHERPY
User avatar
seabeelt
Patron 2019
Patron 2019
Posts: 1614
Joined: Tue Feb 19, 2008 4:22 pm
Your car is a: Fiat Spider - 1971 BS1
Location: Tiverton, RI

Re: Proper way to bench bleed the master cylinder

Post by seabeelt »

Before installing the new MC and before installing the nipples, use a very small funnel or other device and dribble fluid in each hole until full. Gently tap MC to work out bubbles and add more fluid as necessary. Leave a small amount of room at the top of the holes to add the nipples without spilling fluid over the sides and reinstall the rubber plugs that came in the unit while installing in the car. Again to prevent fluid spill - it will eat your paint! Also check out the IAP video or tech sheet regarding the acorn nut. Do not assume that it will be in the same place with respect to the new MC as with the old. Last I put a spill catcher - i.e. Rag under the new MC while installing in the car, just in case to catch any spills or drips

R/
Michael and Deborah Williamson
1971 Spider -Tropie’ - w screaming IDFs
1971 Spider - Vesper -scrapped
1979 Spider - Seraphina - our son's car now sold
1972 Spider - Tortellini- our son's current
bbuckl
Posts: 61
Joined: Thu Mar 10, 2011 1:20 pm
Your car is a: 1979 Spider 2000
Location: New Fairfield, CT

Re: Proper way to bench bleed the master cylinder

Post by bbuckl »

Thanks!

I'll let you know how it turns out...

Brian
Post Reply