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Mack · Drivetrain
190300239
In stock · ships from Knoxville
This is an air pressure regulator for the air-operated clutch assist system found on many Mack heavy-duty trucks.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 4 applications
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All confirmed applications for this part number.
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This component is a regulator, not a clutch assist cylinder, despite being listed as a 'clutch assist cylinder' by some suppliers. In the Mack parts catalog it is explicitly called a regulator. Verify that your truck's air-assist system uses this regulator before ordering.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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It controls the flow of compressed air to the clutch assist cylinder, reducing the effort needed to depress the clutch pedal. When the regulator wears out or sticks, you may experience a hard clutch pedal or inconsistent power assist. Replacing it restores smooth, easy clutch operation.
Part Number: 190300239
CLUTCH ASSIST CYLINDER
Vendor: McMahon Truck Center
Dealer: Knox Trailers
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