BENCH BLEEDING ADVIC/AISIN TANDEM MASTER CYLINDER

Joined
Jan 1, 2011
Messages
263
Location
Tempe, Arizona
Does anyone know what the procedure is to Bench Bleed a new ADVIC/AISIN TANDEM MASTER CYLINDER ? It doesn’t have any fittings in the top outlets. Do you install bleed screws to bleed out the air, close them and then replace the bleed screws with the brake lines when installing, and bleed the system?
 

Pighead

Stop calling it an FJ
Joined
Aug 31, 2004
Messages
9,202
Location
Camino
I use a couple short lengths of brake line threaded into the outlets then curled up to dump into the reservoirs

20211022_121406.jpg


20211022_121432.jpg
 
Joined
Jan 1, 2011
Messages
263
Location
Tempe, Arizona
Great idea.

One question: does it let air in when you take the lines off, or does the cylinder stay free of air as long as the reservoirs stay filled and you keep the inlets either capped after bleeding or keep the MC level while installing?
 

Pighead

Stop calling it an FJ
Joined
Aug 31, 2004
Messages
9,202
Location
Camino
"Bench bleeding" is a misnomer.
I bleed the master with it already bolted to the firewall. Fill the reservoirs with the bleeder tubes installed, pump the pedal long and slow till no more bubbles, refill reservoirs, unscrew bleeders and screw in brake lines.
 
Joined
Jan 1, 2011
Messages
263
Location
Tempe, Arizona
I have that Manual, but I thought you had to bench bleed a new MC before installing it to get all the air out. I believe Pighead was just saying you can “Bench Beed” with it installed. Perhaps you are suggesting the Haynes Manual is implying the same, although I think the procedure is done without the brake lines installed.
 

pb4ugo

SILVER Star
Joined
May 8, 2006
Messages
2,850
Location
spay-lay-wi-theepi, Ohio
Yes you can bench bleed when on the vehicle. Make a run brakelines back to the reservoirs making sure the ends of the lines submerged in the fluid, so they wont suck air. Once bled it's easy to swap the lines to the vehicles. Fluid will slow drip once the line is removed. Then bleed the hole system
 

fyton2v

SILVER Star
Joined
Jan 7, 2004
Messages
627
Location
Santa Rosa Valley, CA
What Pighead said. It's really simple and you don't need to have the MC off the truck. But prepare for brake fluid spillage. Plenty of towels underneath and do this in a place where you can hose it down after you realize you didn't use enough towels. :)
 

jestlurnin

SILVER Star
Joined
Sep 27, 2008
Messages
1,568
Location
Portland, OR
@Pighead what MC are you running on your rig? I’m assuming that’s on your 55?

Also what size fittings am I looking for to build the bench bleed contraption you got there?
 

Pighead

Stop calling it an FJ
Joined
Aug 31, 2004
Messages
9,202
Location
Camino
@Pighead what MC are you running on your rig? I’m assuming that’s on your 55?

Also what size fittings am I looking for to build the bench bleed contraption you got there?
That's a 80 series non-ABS master on my Pig.
I just grabbed those hard lines off the rack and bent them to fit
 

Users who are viewing this thread

Top Bottom