Master Cylinder Question

[snicklas]

On the Bricknose Trucks 87-91 with the "Plastic Master Cylinder" has the cast aluminum bottom housing and the plastic reservior. Is there any pressure difference between the Front and Rear portions of the master cylinder?

I know in the older masters (Cast Iron) the rear larger res. runs the front brakes and the smaller front res ran the rear brakes.

This is on a 1991 F-350 Dually with RABS is there a difference between the front and rear portions of the plastic master? IS there a pressure difference, is the mechanics of the master different? Any difference in the two.

On the E-2 the previous owned plumbed the master front to front and rear to rear, instead of front to rear and rear to front (on master). Do we need to swap them back?

 

[snicklas]

Bump...

 

[Black dawg]

yes, there is a spring inside to proportion the rears.

 

[towcat]

did goatboy get his posting privies revoked?

 

[LCAM-01XA]

yes, there is a spring inside to proportion the rears.

Not inside the master itself tho, the proportioning is done by that huge fitting sticking out the rear port. So yes front->front and rear->rear is the correct way of plumbing it, and no you don't have to change a thing.

 

[snicklas]

did goatboy get his posting privies revoked?

No.... but the free WiFi access at the Campground does not work well, if at all during the day. So he calls me and has me post...... Plus he had been working on the truck, and I don't think he really wanted to get brake fluid on/on his computer.....

 

[snicklas]

Not inside the master itself tho, the proportioning is done by that huge fitting sticking out the rear port. So yes front->front and rear->rear is the correct way of plumbing it, and no you don't have to change a thing.

So on a plastic master, the front port connects to the front brakes and the rear to the rear? Isn't consistancy a wonderful thing...... Thanks for the info..... and I am glad he doesn't need to swap the lines.... most of the system has already been blead.... so at least he does not have to open the system back up.

 

[argve]

Kitten... you ain't getting off that easy.... Me still here but during the daylight hours here at the camper the wifi leaves a lot to be desired.... like for example right now I'm showing the lowest possible signal and it drops out everytime a bird farts between me and the office. - oh well can't complain it's free and I'm not down below where it floods everytime two rain drops come together....

 

[bike-maker]

So do the older cast iron master cylinders with the dual fluid reservoirs work the same way?

 

[LCAM-01XA]

So on a plastic master, the front port connects to the front brakes and the rear to the rear?

That is correct.

So do the older cast iron master cylinders with the dual fluid reservoirs work the same way?

Yup, all dual-chamber work the same, it's just sometimes the front reservoir is larger and sometimes the rear is - regardless of its location on the master tho, the larger tank is always responsible for the front brakes. The plastic-tank masters are also of dual-chamber design, you just can't see the partition as easy when the whole thing is full of brake fluid...

 

[Black dawg]

there still is a spring to proportion inside. I use this master on my stock car, and have to take it apart and block the spring to get enough rear brakes.

 

[LCAM-01XA]

That's interesting, do you happen to have pictures of that thing?