Replacing master, and have a few questions...

[mr_manny]

As you can see from the pic, my master has seen better days.

Doesn't help that I whacked it with a ratchet by mistake.

Down the road I will be upgrading the running gear to explorer, including rear disc brakes. I know several have retained their stock master, while many have upgraded to explorer or even Fseries.

Since It looks like my master is going to need replacement before, which one should I get?
Also, what did you do with the electrical connection...it appears some masters don't have previsions for this.

Thanks in advance.

 

[bronco2fan]

Have you tried here?
1990 FORD BRONCO II 2.9L 177cid V6 Master Cylinder | RockAuto

 

[mr_manny]

I could replace with another bronco unit, but was wondering if one out of an explorer would be better.
Since they cost about the same...

 

[bronco2fan]

I looked at the one on Rock Auto. Seems to be a slight difference in the shape. So, I don't know.

 

[19Walt93]

Disc brakes require more fluid so you don't want a disc master with your rear drums, it would likely make the rear brakes want to lock.

 

[Cees Klumper]

I recently replaced my Bronco II's master cylinder and just got one of the generic ones that Autozone has in stock. Works great, inexpensive and has the electrical connector.

 

[mr_manny]

Ended up getting an 86 Explorer master (without the extra sensor port).
Now I need adapters, or re-flare the existing lines to play nice with the newer master.

 

[mr_manny]

After some practicing on how to make iso/bubble flares, we have now have the replacement master-cylinder installed.

No leaks

Lots of vids on utube, regarding utilizing your regular dbl-flare kit to make iso/bubble flares.

Original flares:

minimal injuries acquired during this installation...always respect the angle-grinder.

All that's left is to bleed the brakes

 

[Cees Klumper]

Congratulations. Yes, always respect the angle grinder, those things are dangerous! (As are defective brakes).

 

[Shran]

Good work. FYI I think you will be fine with that master cylinder. I've messed around with swapping in disc brake axles and various master cylinders and my overall experience is that it doesn't make a bit of difference which master you use. The trucks with the original master cylinder stop just as well as the ones I swapped over to one that was supposedly designed for discs.

 

[19Walt93]

I swapped a 92 Ranger master cylinder onto my 77 Mustang years ago. The original had a cover retained by a spring and always oozed fluid so I couldn't keep paint on the master. The plastic tank on the Ranger master doesn't leak. Both vehicles use similar volume calipers and wheel cylinders so it works just fine. A bigger master makes for less pedal travel but requires more effort, a smaller one would take less pedaal pressure but the pedal would travel more.