Escort mk2 pressure differential help

Hi all,

I bought a Ford Escort MK2 (1979) Sedan Project car recently and am trying to work something out with the pressure differential. The one that the escort has is the one for late models 2 to the Master cylinder and 1 from rear and 1 from front. I have the rear connected up but am trying to work out how the front brake lines connect up to a single outlet to connect into the pressure differential valve?

I know this probably fairly basic but this is my first project car and any help or photos would be greatly appreciated.

Regards,
Yan

Not quite correct James...

The 3 pipe master cyl you described is correct and was on the later Mk2 Escorts.

The 2 pipe master cyl however never came with the pressure differential switch. They had a front line that with a T piece about where the pressure differential switch is on later cars. I have wrecked a number of early and late Mk2 Escorts and this is what I have found in all cases (At least half a dozen of each too...) Early Mk2 Escorts with the 2 pipe master and the T piece did not have the additional brake fail light either as there is no wiring for it.... I have an April 76 with a 2 pipe master, T piece and later model (79 Ghia) loom - and the wires and plug is there, however there is no pressure differential switch to plug it into.... (the 8 I have had and the 2 I have pulled totally apart have 2 inlet's (1 front and 1 rear) on top and 2 outlet's (1 front and 1 rear) underneath... They use different sized connectors so no idiot mechanic (home or other wise) can incorrectly connect them up the wrong way (It is impossible unless you specifically try to and custimise lines or redirect lines)

Not sure when it changed from early system to late, but I would suspect about mid (August ??) 77 when a few other chages like the strut top PCD changed... Swapping the wrong master cyl a couple of cars over the years had produced some weird brake bias and I would not recommend it....

The rear circuit has a single outlet from the differential valve and a T piece down the rear of the car on the diff housing. I think this is from the rear lower port on the valve.

The fronts have their own left and right outlet. One from the front lower and the other from the port at the front of the valve.

Front and rear master cylinders feed into their own seperate ports at the top of the differential valve.

The Gregories Manual (1977-81) also shows a late model 4 pipe PDWS and 3 pipe master phots, but there is a drawing of an early (mid) 5 pipe PDWS also - obviosly it was not common as they could not photgraph one of them, however had photographed the early 2 pipe master cyl....

If they exist, then I should get a 5 pipe PDWS as I have a late model (79) loom in my 76 Escort, with the early braking system - currently the warning light switch connector is not connected (to anything as there is nothing to connect it to) and has not been for 16 years since I built the car...

hers an old pic of mine.