Does anybody know?

[trail B2]

I have an original 86 master cylinder i'm replacing it because the reservoir died.I also have a 92 explorer unit with a good reservoir but the reservoir is different and the master cylinder brake line gland nuts are different.Two questions I don't see any way to put in the explorer master without questionable connections adapters ?Mainly When I get my new master cylinder would it benefit me to put the larger power brake unit off the 92 on?

 

[adsm08]

I dunno if it fits, but it it does the worst that can happen is you stop faster.

 

[trail B2]

I think it will fit I was fishing for ive been doing that for years or the brakes won't release something like that.

 

[holyford86]

if the reservoir is plastic it is removable, I've replaced them before.

 

[trail B2]

Yea I went to try and change the reservoir finished it off and my other one was a little different almost fit.Parts house could only sale me a new one with a master cylinder.Maybe i'll check with ford on Monday but if its close on cost at all i'll change the whole thing.

 

[AllanD]

Bore diameter of the master cylinder is the heart of determining the tradeoff
between "pedal effort" and "pedal motion"

Smaller bore master cylinders will result in more mechanical
advantage, but longer pedal travel
Larger bore master cylinders require less pedal motion to make the
brakes take take up the slack but require that you push harder.

but don't dare mention "proportioning valves" because I've never seen one.
the thing people often point to as a proportioning valve is usually
a pressure differential switch that only serves to activate a brake
warning light.

MOST of brake proportioning is accomplished in one of two ways:
1)By the spring between the two tandem pistons inside the master cylinder
2) by the relative sizes of the caliper bore and rear wheel cylinder diameter.

In drum brakes this is easier to vary as the wheel cylinder bores
are made for various applications in many sizes from 5/8" up to
1" in 1/16" increments.

But it should also be added that drum brakes don't work the way
most people think they do...

AD

 

[HardcoreKeith]

But it should also be added that drum brakes don't work the way most people think they do...

Not to derail, but I'm curious.

 

[trail B2]

Thank you Allen D Put the 93 power booster in but used the stock master cylinder.The stock ones are 7/8 bore and the 93 is a 1" bore if your not Allen D so now my brakes are much easier to push.I like it so far they took quite a bit of pressure after I put on the 33" tires.With this set up it stops easy and smooth.

Hardcore Kieth: I think what Allen D was talking about is drum brakes are self actuating.They use the force of the vehicle in motion to help ad pressure if you ever look at electric trailer brakes you can see easier.