Front brakes hanging

[drjohn33]

New Dodge owner…sorry I am a ford guy…. But I got a good deal on a bit of a basket case 1990 w150 plow truck that has been converted to carb it looks like with a full motor swap. So lots of wiring hacking. I’ve got it running and brakes are hanging…I have not tackled yet thought I would get some advice first. So prev owner replaced calipers, brake lines everything bled…brakes are good and firm but hang up and heat up if going down the road. Is there some sort of proportioning valve that may be stuck or is that not a concept on this truck?

Any advice help you can provide is appreciated.

Thanks,
David

 

[u2slow]

Both sides or one side? Does it pull to one side? I've had several sticking calipers... on the same truck, oddly.

Are the caliper slide surfaces good? I've had one with a worn notch that a pad would hang up in.

The 150 does have a prop valve (250/350 is a combo valve). They generally will cut off the half of the brake system that is failing to pressurize, and may jam from age/rust.

 

[drjohn33]

Thanks u2slow…it is both sides, both heating up, stops straight with no pull. Deer season is starting up, so I will have to dig into next week. I am pulling the carb to bring to deer camp to rebuild and entertain my self in the evenings.

 

[u2slow]

Did the rubber line that drops from the frame to front diff get changed?

 

[PaPitt]

Back when I had my parts store I saw 3 or 4 times one of the Rubber lines COLLAPSE INSIDE & block any fluid from being able to pass & lock up peoples breaks ..
ON my old 1980 Bronco the calipers pistons were made out of ''HOOF'' Plastic material.. & A lot of them twisted ''turned side ways'' in the caliper & that locked up my calipers.. I finally dropped that line of cheaper plastic piston rebuilt calipers & Went back to the Aluminum piston ones.

 

[u2slow]

If you're talking about phenolic pistons... Yeah, when I've had sticking calipers, that's what they had.