Master Cylinders and Boosters.

[sperold]

Are there differences in the years 90 to 95 for these items.

Would the master cylinder and booster for a Taurus with 4 wheel disc brakes and ABS be the same as the SHO?

How about automatic and standard transmission SHOs?

I was sure they would all be alike for all the years until I started looking into it, and I notice a lot of choice and some puzzling descriptions.

Looking for a little clarity on this topic.

 

[luigisho]

There were some differences. The 93 was a higher failure than others IIRC.

 

[sperold]

I am noticing that the listings don't specify SHO any longer.

And most don't have a reservoir included.

Some have 2 threaded ports and some have 4, and they all claim to be the one for me.

 

[rubydist]

The 4 outlet port ones are for no abs, the abs ones have only 2 outlet ports and the abs system divides up to the individual wheels. All the abs ones should be the same, whether for SHO or not.

 

[sperold]

The 4 outlet port ones are for no abs

Wouldn't you know it.... the only listing that specifically mentioned SHOs was the one with 4 threaded ports. So much for factory provided specifications!!

How does the reservoir attach to the master cylinder, is it something that I should be able to do?

I am going to have to hope for no problems on the power brake boosters, I looked at master cylinders and there are different bolt spacing on the attachment pad to the booster, and so far, I can only find one booster supplier; but with some luck, that one will work.

 

[zoomlater]

Did you look at the options on the Shosource site

Products | SHO Source

 

[sperold]

^^^^^Very good advice.
I found something unusual in my search, the ShoSource master cylinder has 3 ports, there is a port on the bottom of the master cylinder.
Other suppliers have master cylinders with 2 ports, they have the boss where the 3rd port is located, but it has not been machined to create the port.

Is anyone familiar with this 3rd port line, and does it lead to the ABS unit?

 

[zoomlater]

does this look like the part on your car, if you search for this part number on ebay, there are other listing with different views.

New GENUINE OEM Ford Brake Master Cylinder F1VY-2140-B (WITH ABS) | eBay

 

[SHOMON]

All on RockAuto
Master cylinder no reservoir Raybestos part# MC390130 $64.79
Cardone Reman booster no master #5474303 $49.79
Cardone Return and Rebuild includes master #504316 $155.99

 

[sperold]

Just to keep the information all in one place:

I looked under my master cylinder on all 3 of my SHOs with ABS, and none of them have that 3rd port.

I am going to get a master cylinder from ShoSource that has the 3rd port and see what it looks like in real life. I thought at one point that maybe it had an extra sensor rather than a direct line to the ABS module, but I have nothing like that on my cars with ABS.

Thank you Zoomlater and Shoman for your recent comments and Rubydist for an earlier response, all have been helpful in my quest.

I have the 90 Helms manual and it does feature the 4 wheel disc with ABS system, and none of the diagrams concerning the master cylinder show this 3rd port on the bottom of the master cylinder.
And the vehicle application of this "Brakes - 4 Wheel Antilock" system reads "Taurus / Sable (except 2.5 liter), Taurus SHO".

 

[sperold]

I got the ShoSource master cylinder and here are my findings:

The 3 port master cylinder is a myth. The ShoSource model has the same untapped boss on the bottom of the cylinder that you see from other sources. I was going to check with ShoNut, who makes the stainless line kits, but it does not seem necessary now. If it was plumbed-up, he would know about it.

Thanks to all that contributed.

 

[sperold]

It appears that if a Taurus or Sable car or wagon had 4 wheel disc brakes, it had ABS.

It appears that a vehicle with drum rear brakes did not have ABS.

The master cylinder of the ABS cars have 2 tube lines exiting the unit. (2140)

The master cylinder of the drum brake cars have 4 lines exiting the unit. (2C158)

The disc brake cars have the Left front tire and the right rear tire on one circuit and the other circuit has the right front tire and left rear tire. This is accomplished in the ABS unit.

The drum brake car has the front 2 tires on the rear circuit (in the master cylinder) and the rear 2 tires on the front chamber circuit .

The ABS cars have a master cylinder reservoir that has a feeder tube that provides brake fluid to the mini reservoir on the ABS unit. (2C017)

All cars use the load sensor at the rear suspension to reduce brake line pressure to the rear wheels. (2B547)
The station wagons use reducing valves on the master cylinder output lines to accomplish the pressure reduction. (2B091)

It appears all cars and wagons use the same power brake booster. (2005)
The disk and drum brake cars have an adjustable rod that contacts the master cylinder from the pedal set-up.
The 4 wheel disc cars do not have an adjustable rod.

 

[sperold]

Here is an update that really helped me a lot.
When looking at the ABS hydraulic unit mounted on the car, there are 4 outlet ports. Following are the wheels each port supplies, from left to right on the hydraulic unit:
1, rear driver wheel
2. front passenger wheel
3. front drivers wheel
4. rear passenger wheel.

In my situation, I noted the leak was at the 3 union block located in the hard to access place behind the strut tower and it was the 3rd union that was leaking. I was unable to get to that location physically, but I was able to see that it led to the passenger front wheel.

I totally bypassed that tube disaster and ran a new nickel copper line from the 2nd port on the hydraulic unit, across the engine bay to the passenger wheel rubber line connection, and all is well again.

The ABS hydraulic unit has bubble flair (metric) tubing connectors and the wheel flex line has SAE American double flair connections. All hydraulic tubing is 3/16 inch outside diameter which is 4.75 mm diameter in the metric system.
The fitting threads on the hydraulic unit are 12 - 1 and 10 - 1 (metric), depending on the port, and use the bubble flair tube end of the tube
The fitting threads on the flex line junction are either 3/8 - 24 or 7/16 -24 (American), and use the double flair tube ending.

I you do not want to get involved in metric bubble flair fittings, you can buy adaptors with a bubble end to thread into the hydraulic unit and SAE (American) on the end where you attach the tubes.

Be careful when buying threaded male tube adaptors, because the metric and American threads will fit in each others female receivers, but if mixed up - will leak.