Master cylinder installation?
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Drifting
Joined: May 2019
Posts: 28
Likes: 1
Master cylinder installation?
Don't know where my post from yesterday disappeared to, but I am replacing master cylinder on 97 Disco1 XD and need to know how to bench bleed the master, or can I bleed it after installation?
Also, about the ABS, some people say to keep the engine running while bleeding the calipers, others say to only turn ignition on after each caliper bleed and others say do nothing.
I have downloaded the RAVE manual but am unable to unzip the file on my Mac. Thanks for your help.
Also, about the ABS, some people say to keep the engine running while bleeding the calipers, others say to only turn ignition on after each caliper bleed and others say do nothing.
I have downloaded the RAVE manual but am unable to unzip the file on my Mac. Thanks for your help.
Rock Crawling
Joined: May 2006
Posts: 401
Likes: 55
From: MD
I have a 1998 but this should be the same
bench bleed just means to bleed the MC on its own first - before connecting the brake lines. -Im sure there a video out there of it but heres the basics
you can do this on the bench or with the MC mounted but without the brake lines connected.
take 2 plastic fittings with flexible hose (plastic fittings and flexible hose usually come with a quality MC replacement - if not you may need to get some from the Autostore)
connecting one to each MC outlet port (where the brake lines would connect)
direct the end of the flexible hose into the reservoir
fill reservoir
pump until bubbles stop,.... keeping the end of the flexible hose below the surface of the fluid
then remove the flexible hose - make a mess
connect brake lines and begin bleeding at calipers
I have never had a issue bleeding without the vehicle on or doing anything like turning one between each bleed etc..... but I can say - the system likes to hold bubbles - I usually do two full bleeds
I have also read that cracking the only 13mm brake fitting loose on the ABS is a way to get the last bit out (after bleeding at the calipers) - though I have never needed to do this.
bench bleed just means to bleed the MC on its own first - before connecting the brake lines. -Im sure there a video out there of it but heres the basics
you can do this on the bench or with the MC mounted but without the brake lines connected.
take 2 plastic fittings with flexible hose (plastic fittings and flexible hose usually come with a quality MC replacement - if not you may need to get some from the Autostore)
connecting one to each MC outlet port (where the brake lines would connect)
direct the end of the flexible hose into the reservoir
fill reservoir
pump until bubbles stop,.... keeping the end of the flexible hose below the surface of the fluid
then remove the flexible hose - make a mess
connect brake lines and begin bleeding at calipers
I have never had a issue bleeding without the vehicle on or doing anything like turning one between each bleed etc..... but I can say - the system likes to hold bubbles - I usually do two full bleeds
I have also read that cracking the only 13mm brake fitting loose on the ABS is a way to get the last bit out (after bleeding at the calipers) - though I have never needed to do this.
Last edited by whiskeynipple0088; May 17, 2019 at 02:54 PM.
Pro Wrench
Joined: Oct 2013
Posts: 1,512
Likes: 171
From: Central Minnesota
Last time I had the MC replaced, (it was -15 degrees outside) They had to re-bleed the next day as I had no pedal when I went to pick it up. I have used a vacuum pump at the calipers to draw out the bubbles and it worked good when I didn't have an assistant to work the brake pedal. Never had to bled the ABS or run the engine when I bled the lines.
97 D1
97 D1
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CollieRover
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