Mechanics

FORD F-350 BRAKES PROBLEM

1993 Ford F-350 • 370,000 miles

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?
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Guest
October 27, 2012.




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.

Caradiodoc
Oct 27, 2012.


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