Ongoing Master cylinder crisis!!!
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New User
Joined: May 2011
Posts: 18
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Ongoing Master cylinder crisis!!!
Hi everyone! I wanted to impart to you another question about the master cylinder issue that has been on going since. I got the new kits for the cylinders and replaced them both, cleaning and scrubbing the casings thoroughly. After I reinstalled the clutch cylinder, I finally was able to get fluid moving through the line, so I closed the bleeder valve on the slave cylinder. For some strange reason, I cant prime it. I dont know if Im doing something wrong, or if the slave cylinder is bad. I cant tell of a leak anywhere. I was hoping you could shed some light on this for me if have an idea why this might ben happening. Also, the cylinder kits were both for the clutch cylinder, not one for the clutch and one for the brake. LMC didnt have a kit for brake cylinder, so I used a clutch cylinder kit for the brake. Havent tried it yet; focusing on the clutch at this point. Is that not an ok thing to do?
Senior User
Joined: Sep 2010
Posts: 181
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You have to bench bleed the master cylinders before they will pump fluid. Take a piece of steel line or rig up a hose that will connect to the master cylinder out port and route it into the resivoir. Fill the resiv about 3/4's full of fluid and make sure the line/hose is in the fluid, pump the cylinder in slow complete strokes with a long phillips screwdriver or something and watch the air bubbles come out of the line/hose and into the resivior, when it is just pumping fluid, no bubbles, install on truck and proceed bleeding the system.
Post Fiend
Joined: Mar 2007
Posts: 5,776
Likes: 2
From: springfield il
what do you need brakes for ???? isn't that why your truck and all the other vehicles have bumpers to stop each other's forward momentum ........ like he said bench bleed the mc first then bleed the system out .
Cargo Master
Joined: Feb 2008
Posts: 2,795
Likes: 129
From: Windermere Valley,B.C. Ca
I got your message, Thanks.
Two things, if you don’t put your year and model of your truck in your signature line then you should included it in each new message because members that have not read your previous message have no idea what vehicle you have.
In regards to the brakes and more, I think that a shop manual would be of great benefit to you at this time, they usually come with illustrations and step by step instructions.
Posting Guru
Joined: Feb 2009
Posts: 2,002
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From: victoria
in the lmc parts book the kit numbers are the same for the clutch and the brake..the picture shows the residual valve ..how is it going..sorry I took so long to get back ..I burned up my wife's truck over the weekend ..don't worry ..just a chev..
