I HAVE A 93 F350 TOW TRUCK WHEN THE TRUCK IS ...

1993 Ford F-350

Tiny

Anonymous

October, 27, 2012 AT 7:04 PM

I have a 93 f-350 tow truck, when the truck is loaded with a car and the brakes are applied the front brakes lock up, when unloaded the fronts lock up when applied hard. What could possibly be the problem with the brake system?

1 Answer

Tiny

caradiodoc

October, 27, 2012 AT 7:48 PM

Start by checking if there's a height-sensing proportioning valve in back with the brake line(s) going to it. Look for a linkage to the axle housing or leaf spring that is disconnected. They use that valve on most trucks and minivans because there can be such a wide variety of how the load is distributed front-to-rear. Its purpose is to balance the front and rear brakes under varying conditions.

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Brake Shoe/Drum Replacement - Rear