I have a 648E that wont release the parking brake. It has been a gremlin for some time. The machine is not used everyday. I have checked the plug connections and the switch at the shift lever. A week ago it released but only after some time. It seemed as though after I took it out of park into neutral it did not release immediately. After about 30 seconds the "parking light" would go out and the brake would let go. Today after a long warm up it would not release at all. I have the parts breakdown and see a brake valve block where all the action takes place under the cab. I have heated it up double checked all the wire connection. The hydraulic line that release the brakes come out of this block under the cab. Im thinking maybe there might be air in the line? Or a sticky electric servo? Anyone had the same problem and how did you cure it. I have all the tools I need, visegrips and various sized hammers and of coarse duck tape. Thoughts anyone?
648E park brake wont release
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