The clutch brake is about 5 to 6 inches in diameter it is a floating ring at the back side of the throw out bearing around the transmissions input shaft it will have a tooth on its ID that rides in a slot on the in-put shaft ensure it is still keyed to the shaft.
When the clutch is fully depressed it gets squeezed between the back of the throw out bearing and the front of the transmission to stop the in-put shaft from freewheeling. When the truck is in gear and rolling you should never fully depress the clutch peddle so that this brake is engaged it is meant only to stop the transmission's input shaft from free wheeling. The first time that the clutch brake is engaged with the weight of the truck pushing on it, it will most likely break it buy sheering of the teeth that key it to the shaft.
That said the clutch brake is adjusted with the linkage in the pedal the clutch is not it is adjusted in the manner Racecarl described above. First step is to see if the clutch break is in good shape and adjusted properly it should be tightly held between the front of the transmission and the throw out bearing when the pedal is fully depressed right at the bottom of pedal travel. If this is the case the clutch brake should function fine and don't mess with the pedal linkage any more.
After the clutch bake is in order it is time to adjust the clutch. If the pedal is at the top of travel when the clutch engages and disengages it will need adjustment find the adjuster on the pressure plate through the square inspection hole at the bottom of the bell housing you may need too bump the motor over till it comes to the bottom and is excisable thought the inspection hole. Their are a few different types the easiest to do will have one or two smaller bolts that hold a retainer on that prevents a larger bolt from turning this larger bolt is the adjuster. This adjuster will not turn unless the pedal is fully depressed so have a friend push in the clutch while you turn the adjuster clockwise for more free play counter clockwise for less give it two or three turns let the clutch up and check the free play at the peddle continue this process till you have your two inches of free play and the clutch is fully disengaged well before the clutch brake engages replace the adjuster retainer and inspection cover and you should have a properly adjusted clutch and clutch brake.
Remember the linkage should only be messed with if the clutch brake is out of adjustment it is not used for adjusting the clutch but the brake adjustment must be done fist if needed if the brake is in adjustment leave the linkage alone the clutch is adjusted with the adjuster on the pressure plate not the linkage.
Last edited by HevyHauler; 05/22/2008 4:26 PM.
