Bench Bleed The Clutch Master Cylinder? - IH8MUD Forum

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You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. Bench Bleed the Clutch Master Cylinder?

• Thread starter Thread starter greytandy
• Start date Start date May 20, 2007

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greytandy

10 Year 15 Year Joined May 14, 2006 Threads 154 Messages 1,660 Location MD 'Burbs of DC I'm installing a whole new master/slave cylinder system for the clutch, and have read references to "bench bleeding" the master. What exactly is this? Is it necessary? Thanks. 1970 FJ40 (AKA "Big Red") 2007 FJ Cruiser (Black Diamond ) [FONT=arial, geneva, helvetica][/FONT]http://www.greyrescue.org/

pbgbottle

Forum Lifer

10 Year 15 Year 20 Year Joined Feb 8, 2004 Threads 293 Messages 5,659 Location Cloverdale B.C. Canada Website www.instagram.com bench bleeding Jake S ROTW: PBGBOTTLE 1978 FJ40 chevota BC Canada

Pin_Head

10 Year 15 Year 20 Year OG Joined Feb 6, 2002 Threads 29 Messages 15,435 Location OC, CA "Bench" bleeding is not necessary, although it is useful if you are working alone. Clutch masters bleed well by just cracking the bleeder on the slave and letting gravity do the work. If there is air in the master after bleeding it, you can just loosen the nut on the line on the master and squirt some brake fluid into a shop rag, then tighten it before sucking air back into the master. This is a two person job.

greytandy

10 Year 15 Year Joined May 14, 2006 Threads 154 Messages 1,660 Location MD 'Burbs of DC Thanks guys. The master cylinder and slave cylinder are all "connected" by the same hydraulic fluid, right? So, why would the master need to be bled separately? It seems to me all the air would be released from the slave since it's all the same fluid. Just wondering what I'm missing. 1970 FJ40 (AKA "Big Red") 2007 FJ Cruiser (Black Diamond ) [FONT=arial, geneva, helvetica][/FONT]http://www.greyrescue.org/

F-junker

Joined Oct 25, 2005 Threads 206 Messages 1,769 Location Hagerstown MD One for the front disc brakes and one for the rear. The picture up above is as good a discription as it can get. You want to make sure to get ALL of the air bubbles out of the cylinder. 1978 (mostly) FJ-40, lift, 2F, bigger tires and custom swiss cheese body panels to reduce weight! Various other toys 87 4runner, Motorcycles Ducati and Triumphs with an old Mach III in the mix.

pbgbottle

Forum Lifer

10 Year 15 Year 20 Year Joined Feb 8, 2004 Threads 293 Messages 5,659 Location Cloverdale B.C. Canada Website www.instagram.com i bench bled my last brake master, but did not bother bench bleeding my clutch master, had no issues . i just gravity bled it also. Jake S ROTW: PBGBOTTLE 1978 FJ40 chevota BC Canada

greytandy

10 Year 15 Year Joined May 14, 2006 Threads 154 Messages 1,660 Location MD 'Burbs of DC

pbgbottle said: i just gravity bled it also. Click to expand...

For a clutch, is gravity bleeding better or worse than the good old two-person loosen, push clutch, tighten, repeat technique? 1970 FJ40 (AKA "Big Red") 2007 FJ Cruiser (Black Diamond ) [FONT=arial, geneva, helvetica][/FONT]http://www.greyrescue.org/

Pin_Head

10 Year 15 Year 20 Year OG Joined Feb 6, 2002 Threads 29 Messages 15,435 Location OC, CA Properly executed, the two person method is fool proof for every application, but clutch masters seem to bleed just fine by gravity.

pbgbottle

Forum Lifer

10 Year 15 Year 20 Year Joined Feb 8, 2004 Threads 293 Messages 5,659 Location Cloverdale B.C. Canada Website www.instagram.com i just gravitly bled it because i was by myself , i just let it bleed while i did other things .such as clean up my mess i usually use the two person method . Jake S ROTW: PBGBOTTLE 1978 FJ40 chevota BC Canada

greytandy

10 Year 15 Year Joined May 14, 2006 Threads 154 Messages 1,660 Location MD 'Burbs of DC Just so I know for sure, gravity bleeding simply entails letting the air slowly work its way out of the system? In other words, just simply letting it sit? No turning of the slave bleeder? How long do you normally let it set? Sorry for asking so many questions. I just want to make sure the job is done right. Thanks again. 1970 FJ40 (AKA "Big Red") 2007 FJ Cruiser (Black Diamond ) [FONT=arial, geneva, helvetica][/FONT]http://www.greyrescue.org/

pbgbottle

Forum Lifer

10 Year 15 Year 20 Year Joined Feb 8, 2004 Threads 293 Messages 5,659 Location Cloverdale B.C. Canada Website www.instagram.com just fill the resevoir on the master crack open the bleeder screw on the slave and let it be .shouldn't take long and out comes the air ,and then see bubbles, and eventually the clean fluid, no bubbles ,something like that Last edited: May 20, 2007 Jake S ROTW: PBGBOTTLE 1978 FJ40 chevota BC Canada

TOR25

Joined Feb 10, 2007 Threads 10 Messages 54 Location Durango,Co I was able to reach the bleeder valve with my left hand and the clutch pedal with my right. Somewhat uncomfortable but it worked. 73 FJ-40 "Stock"-missing a few parts In the midst of painless installation.

Avro

10 Year Joined Mar 3, 2014 Threads 21 Messages 62 Clutch master cylinder bleeder screw location Can't find the bleeder screw on my 85 bj 60 land cruiser. Can anyone help?

mossman40

10 Year 15 Year Joined Sep 4, 2007 Threads 14 Messages 551 Location Pittsburgh, PA Bleeder screw should be down by your slave cylinder. Follow the lines down to the slave and look for your bleeder screw there. 1977 FJ40 1994 FZJ80 2005 Tacoma Dbl Cab 2007 FJ Cruiser 2014 Tundra 1794

Fast Eddy

10 Year 15 Year Joined Apr 4, 2006 Threads 449 Messages 14,182 Location NorCal あなたのミスター豊田に感謝。 '97 FZJ80 40th Anniv. Ed. w/Lockers & 127k mi My first '78 FJ40 (now sold) - Marvin, '76 FJ40 before - after L

loumar1684

Joined Nov 8, 2018 Threads 0 Messages 1 Location Florida Not sure if this is the right place for this question, but perhaps someone can direct me. On a 97 fort escort wagon I have replaced both the slave and master clutch cylinders. No fluid coming out of the slave, pump clutch several times and nothing. Provided I have not ruined the Master cylinder... is this when I can open the Slave and hopefully it will gravity bleed itself and then I crack the Master line and let some fluid out and close line again? Please advice... newbie at this. Thanks

Pin_Head

10 Year 15 Year 20 Year OG Joined Feb 6, 2002 Threads 29 Messages 15,435 Location OC, CA It is just a cylinder, so the fluid moves back and forth. If you want it to pump fluid, cover the outlet with your finger so the fluid doesn't get sucked back into the cylinder. 1

1969FJ

Joined May 14, 2016 Threads 1 Messages 2,433 Location Arizona The reason to bench bleed is because when the master is empty, and you fill it, as you push the piston , it will allow fluid and air to move around. As you add fluid to replace where it is going, air will enter again. Now, if you have those output tubes going back to the reservoir, eventually you will get equilibrium and all air will be squeezed out and only fluid will remain. I can suggest a real easy way to do brakes or clutch systems easily by one person. Take a look. Phoenix systems. You must log in or register to reply here. Share: Facebook X Bluesky LinkedIn Reddit Pinterest Tumblr WhatsApp Email Share Link

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