Trying to replace the proportion valve (distribution block) on my 1975 F250 highboy with drum brakes all around. I'm having a hard time locating a replacement part.

I believe the switch on this valve is bad and giving me a brake light on my dash.

LMC catalog only shows a Prop valve for disc brake system.
Any help in locating one or a part number appreciated

Procedure to recenter the existing one appreciated as well; that may/may not turnoff the light.
Thanks
Tbruz

 

Procedure: On a Quest to get the brake warning light to go out - The FORDification.com Forums

 

Actually, for a 4-wheel drum brake system, it's called a pressure differential valve not a proportioning valve.
Pressure differential valve
73-75 F250 4WD
C8TZ-2B257-C
Unfortunately no dealer or obsolete parts supplier has one. If you think it's the switch itself is bad, that can be replaced.

Differential switch
C8AZ-2B264-A
Morton-Shell Ford, West Plains, MO has 1 (417) 256-3193
Rusty Eck Ford, Wichita, KS has 1 (316) 685-9211
Klimesh Motor Sales, Calmar, IA has 1 (563) 562-3241
Autonation Ford, White Bear Lake, MN has 4 (651) 484-7231
There are more dealers that show them in stock.

 

MSRP: $35.35 / FTE Ford dealer parts dept sponsor horizonpartsguy.com online price: $23.92 / Horizon Ford Truck Center - Seattle (Tukwila) WA

Applications: 1968/69 FoMoCo Passenger Cars / 1968/79 F100/350, Bronco and Econoline.

 

I found mine on e-bay for about $28 a few months ago as I plan to convert my '69 F250 to disc someday. Another seller has them for $50. They are likely universal but are a close match.

 

Hoss
Please clarify if you found the switch or the distribution block on Ebay for $28.
Thanks
Tbruz

 

My local Ford dealer was able to get me the OEM brake pressure switch for $32.00.
Installed it but the dash BRAKE light is still illuminated.

I recently installed new wheel cylinders all around and light came on after that(was not on prior to that repair) even though when I pulled the switch it was crusty and jammed in the up position, that's why I replaced the switch. I will be trying the procedure to center the spool valve today.
Thanks
Tbruz

 

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The pressure differential valve looks like this.





Cutaway view of internals.

 

^ This is C8TZ-2B161-A .. Brake Pressure Metering Valve used on 1968/79 F250 2WD & F350 with disc brakes. I can post a pic of it, if you wish.

C8TZ-2B257-C .. Brake Pressure Differential Valve for 1968/75 F250 4WD with front/drum brakes is shown at the far right as 2B257 in the pic. Its warning lamp switch is shown as 2B264.

 

I'm not clear IF you're saying the component I (previously) have pictured is a Metering Valve (?). IF you are, that's not what I have pictured.

The stand-alone Metering Valve has no pressure warning switch sticking out of it but the Pressure Differential Valve does.


On the other hand, this is a stand-alone Metering Valve for the front disc brake circuit on certain applications.




The Pressure Differential Valve again.