No rear brakes (now working as of 2/13/09)

[FLATBEDFORD]

You need a buddy experienced with DRW four drum beasts.

Here's the deal... you pay for gas, i'll bring the beer

Good luck Flatbed.
Two-bit

You'd have to bring a lot of beer. Good thing you've got DRW truck!
I'm still saving the last one.

[FLATBEDFORD]

I took a few minutes to read my new (to me) shop manual the other day. It seems I was doing it all wrong when I was trying to reset the brake warning switch. It also seems that when the switch is tripped that the flow of fluid to the circuit with trouble is restricted. I'll have to try again when I have some time and a helper. Tony, when should I expect you?

[FLATBEDFORD]

On the F-350's there another valve mounted to the L/S frame about halfway between the cab and rear axle, IIRC. I do not remember just what it is that it does. That customer of mine that has a '67 F-350 for his daily work truck was telling me he had to replace it and I had never heard of such a thing so I took a look and there it was. Next time I talk to him I'll ask him again just what the heck it's there for.

I got some pics of that truck somewhere...

No other valves along the frame on my truck. The lines look newer, could have been tossed by somebody in the 36 years before I had it. I was reading my newly acquired Ford shop manual. There should be some kind of pressure check valve in the outlet for the rear brakes. When I replaced the master 2 1/2 years ago I had no idea about this. I don't think the replacement had such a thing.
The manual is not very specific with the distribution block valve reset procedure. Has anybody successfully reset one? What did you do? I'll search here too because I know this comes up all the time.

[FLATBEDFORD]

I searched and found this.
http://www.fordification.com/forum/view ... set#p15425

I think I was doing it wrong. I'll try again tomorrow, if I can find a helper.

[FLATBEDFORD]

Well. I did it right this time. Light is still on. I think I'm gonna move on to some furniture refinishing that I started a year ago.

[69timemachine]

Does the light go off if you unplug its harness at the prop valve? I'm still leaning towards the switch on the prop valve being bad.

Doesn't the E-brake also have a switch to light up the light when the E-brake is on? Could it be misadjusted or the pedal down slightly causing it to light up? Just trying to cover all the bases.

[FORDification]

No, the e-brake doesn't have an indicator light. The one on the lower left of the dash is for the hydraulic brakes only....and yes, re-centering that valve is usually a major PIA.

[1971ford]

Does the light go off if you unplug its harness at the prop valve? I'm still leaning towards the switch on the prop valve being bad.

Doesn't the E-brake also have a switch to light up the light when the E-brake is on? Could it be misadjusted or the pedal down slightly causing it to light up? Just trying to cover all the bases.

some bumps have e-brake lights that light up when the ebrake is on, but thats a different system and ive only seen it on a couple bumps.

[FLATBEDFORD]

Finally got a helper yesterday. I opened the rear bleeders, there is a good stream from both sides. I guess my 2 year old wheel cylinders are both seized. i decided to bleed the fronts and broke one of the bleeder nipples right off.


'70 F350 DRW flatbed FOR SALE. 360, 4spd. Comes with a whole bunch of extra parts and good intentions. Needs brake work.

[FLATBEDFORD]

Replaced wheel cylinder with broken bleeder today. One of the springs broke when I was putting it all back together. My parts guy says a couple weeks for hardware kit. I ordered from rockauto. Haven't even gotten to mess with the rears again. Wheel cylinders for rear are in stock. I think my truck is trying to tell me that it wants the front disc conversion.
Its gonna be on jack stands for a while now. Won't have time to mess with it again until the end of next week. Waiting for parts and working both days of the weekend again.

[71 LONG BED]

(hadda post something to subscribe to see how you make out.... )

Hey Tony!! What's new I have been thinking about you. I still have your number, I'll be calling you soon....

[FLATBEDFORD]

Hey John. How's the family? New job still OK?

[FLATBEDFORD]

Here's a diagram from the shop manual with that valve.

I started a new thread on the residual pressure check valve here
http://www.fordification.com/forum/view ... =5&t=36444

I've been reading my '70 Ford Truck Shop manual about brakes. In the section on the master cylinder, I see that there should be a residual pressure check valve on the port of the master for the rear brakes.


I replaced my master cylinder about 2 1/2 years ago. At the time, I did not have this manual and did not know about this check valve. I have no idea if there was one in the rebuilt master that I installed. Is this normally part of a rebuild? If there isn't one in there could I add something like this to the rear brake line?

ssbc_r_valve_a07642_a07652.jpg

http://www.autoanything.com/brakes/65A3153A0A0.aspx

It seems like this would be easier to get than the one that should be in the master cylinder. Any thoughts?

Maybe the inline valve is what ToughOld Ford was talking about here.

" ToughOldFord wrote:On the F-350's there another valve mounted to the L/S frame about halfway between the cab and rear axle, IIRC. I do not remember just what it is that it does. That customer of mine that has a '67 F-350 for his daily work truck was telling me he had to replace it and I had never heard of such a thing so I took a look and there it was. Next time I talk to him I'll ask him again just what the heck it's there for."

[Jake11]

It's under the seat for the flair on the tubing. You only need them on drums. To change it or to look if its there,
screw a sheetmetal screw in a few turns and just pry it out with a screwdriver. Leave the screw in and use it to
tap the seat back in. It won't leak. Jake

[Thunderfoot]

" ToughOldFord wrote:On the F-350's there another valve mounted to the L/S frame about halfway between the cab and rear axle, IIRC. I do not remember just what it is that it does. That customer of mine that has a '67 F-350 for his daily work truck was telling me he had to replace it and I had never heard of such a thing so I took a look and there it was. Next time I talk to him I'll ask him again just what the heck it's there for."

I may be wrong here and it is just a guess, but if it is what I'm thinking, it's an adjustable proportion/bias type valve... does it have an arm attached to it? Can you get a pic of it?

My 86 chev 1-ton had this (so just guessing the ford may have done something similar), It is set up so that the more you load the back of the truck down and it "squats" it adjusts and puts more rear brake bias in. When you don't have a load it adjust to less rear bias... Personally I never liked it as I never had enough weight in it empty and that is what my truck was most of the time or pulling a trailer... My buddy had the same problem with his in his chev and took it out of the system and has been happy ever since! It is real fun backing a boat into the lake and only the front brakes want to lock up (nothing from the back) [I had the same problem when I had mine, not fun sliding into the lake ]
Some have been able to re-adjust them to work better...