The process is the more or less the same for hydraulic clutches across all years, makes and models of semi trucks, it resembles bleeding brakes on a car. Here are the steps for bleed the clutch on your semi truck:
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Fill the clutch / brake fluid to the maximum level in the reservoir
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Locate the bleed fitting on the transmission, usually on the slave cylinder housing if its visible, attach a clear and air tight hose to fitting and submerge it in a container with enough clutch / brake fluid to cover the hose end
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Press the clutch pedal 10-15 times or until it gets firm while pressing (if there is air in the system it will not be firm, so just press the pedal 15 times)
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Press the pedal to the very end and hold
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Unscrew the bleed fitting and watch the air bubbles go through the hose and once they stop flowing tighten the fitting back up
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Release the clutch pedal and repeat steps 1-6 until there are no air bubbles in the fluid from the bleed fitting
- This process may be lengthy, If you're in a shop environment you can expedite this procedure by creating an air adapter inside of an old clutch reservoir cap and applying a very minimal amount of air to the system, do this at your own risk.
If you're looking for a replacement clutch, check out our Drivetrain collection for your Freightliner Cascadia, we offer different options of clutches to fit your standards.
