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Experts,
Need some help on 68 F-600 Brakes:
1) Everything Shoes, Whl Cylinders, hardware front and back is new. Master Cylinder is new.
2) Problem is Back Brakes lock up in rear after some driving and heat build up. Never feels like the front brakes engage at all. I have adjusted the shoes front and back. Pedal Travel might be 1/2 inch at best.
3) I have attached pics of the Vin Plate, Booster and Master Cylinder that is on the truck. I'm no engineer but I feel I don't have enough pedal travel to push fluid to front brakes or pull the fluid back from the rear wheel cylinders once the pedal is released..
4) Not sure the Booster on the truck, came on the truck, or I'm missing a spacer between the Booster and firewall. Some one used lug nuts over the studs to pick up Booster spacing so the rod would connect to the pedal. Rod is too long without spacing.
From looking at the Vin Plate Booster and Master Cylinder does anyone know if this truck even came with a Booster.
Does anyone know a Part Number for a Dual Port Master Cylinder that will fit this truck and the right proportioning valve to do away with the Booster.
Thanks
Don
I am guessing about this, just to be clear. Your truck might have come with a hydro-vac type booster located under the driver seat inside the frame. Those had a vent hose that came up into the cab just behind the driver seat. Are there any remnants of that type of system?
Lug nuts for spacers, rod too long, limited pedal travel all point to a mismatch of components at best.
E85,
Thanks for the info no Hydro Vac system. No brackets under the cab and no vent tube. We have a 70 f-600 parts truck that has that system. So if this truck had a booster it was firewall mounted. I think the problem is the booster. The booster on the truck is the same booster as a 70 Model Louisville. So the problem is mixed components. I will keep working it. Do you think a none booster system will work. I'm thinking of going to another firewall mounted master cylinder and see waht happens.
KULTULZ,
The diagram posted is a great help. This truck didn't have the under the truck Hydra Vac system. Brackets under cab and no hole in floor pan for vent hose. I do have a parts manual and will go to that. This is a dash mounted system I feel certain. The back brakes are 15x4, not sure on the front will check but I think they are 14x2. I will reference the manual and start the hunt. Do you feel just a two port Master Cylinder the right proportional value and no booster would work?
I will reference the manual and start the hunt. Do you feel just a two port Master Cylinder the right proportional value and no booster would work?
Thanks
Southriver
If you want to go to SPLIT BRAKES, there is some chassis plumbing to do also. How heavy (with load) will the truck be? I would consider acquiring the correct booster.
The valve you are describing is not a Proportioning Valve but a Pressure Differential Valve.
The donor truck you are describing may well have everything you need to changeover. You might have to buy a reman booster and/or MC but at least you will have exchange cores. I can also give you original FORD PN's so that a changeover catalog will be easier to use.
Just for my curiosity, can you show a reverse photo of your present booster and MC?
JMO: I would put in a split system, using Ford OEM or equivalent parts.
I would definitely have power assist. You need all the help you can get to stop these, and in normal driving, the power assist makes driving them more pleasant.
You ask that I send you some more pics of my Booster and MC. They are attached. Still looking for a donor truck and other parts options to go with the right stuff.
You ask that I send you some more pics of my Booster and MC. They are attached. Still looking for a donor truck and other parts options to go with the right stuff.
.
I really appreciate that. It seems you have the wrong booster. Are there any STAMPING NOS. or TAGS on it?
FORD did have SGL HYD on later models. I thought you said you have a 70 SPLIT BRAKE donor? Otherwise I can give you booster I.D. NOS if you decide to stay SINGLE.
KULUTZ,
No I have not found a split donor yet. I had a 70 Louisville which has the exact same booster as the one in the pic I sent you (much larger brakes system than what I have. If you have a Part # for NOS booster and MC that should be on my TRUCK Please send.
No I have not found a split donor yet. I had a 70 Louisville which has the exact same booster as the one in the pic I sent you (much larger brakes system than what I have. If you have a Part # for NOS booster and MC that should be on my TRUCK Please send.
Thanks
Southriver
OK ...
It appears to me your truck has/had a dash mouted booster at some point due to the appearance of the mounting position of a booster (paint not faded) -
Your application is shown on the chart below - Line 108. It calls for a MIDLAND BOOSTER (PN shown will be vendor).
1970 APPLICATION is Line 111. It calls for a different booster (on split system).
Line 108 below will give you FORD PN for BOOSTER and MC
It appears C9TZ 2005-E is the FORD PN you need. You will have to have the FORD PN crossed to current MIDLAND and see if a TRUCK PARTS HOUSE can order a reman and then compare.
Ask if I have confused you.
If you decide to go split, you will need a donor as they are completely different (hydraulic systems) (IMO)
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