Luk LMC525 Clutch Master Cylinder

Clutch Master Cylinder for Mercedes-Benz Diesel Manuals

Restore hydraulic clutch release performance with this LuK clutch master cylinder, part number LMC525. It is a new replacement unit with a push rod included and installation instructions included, making it a direct service part for manual transmission repairs on select Mercedes-Benz diesel models.

• New clutch master cylinder for hydraulic clutch release systems
• Push rod included for installation
• Installation instructions included
• Pre-filled fluid: No
• Pre-bled system: No
• Clutch slave cylinder included: No
• Heat shield included: No

OE-Style Hydraulic Clutch Service Part

LuK has extensive experience in hydraulic clutch release systems, and this clutch master cylinder reflects that background in a service replacement format. The LMC525 is built for manual transmission clutch hydraulics on Mercedes-Benz 300D and Mercedes-Benz 300TD applications, helping maintain consistent pedal-to-release action in vehicles that rely on a properly functioning master cylinder. This part cross-references Dorman - First Stop CM39659 for the same application.

Vehicle Fitment

• Fits 1976-1981 Mercedes-Benz 300D, N/A
• Fits 1979-1984 Mercedes-Benz 300TD, N/A

Common Problems This Part Can Address

• Soft or sinking clutch pedal caused by hydraulic leakage
• Difficulty disengaging the clutch during shifting
• Loss of clutch pedal pressure from internal master cylinder wear
• Fluid seepage at the clutch master cylinder
• Inconsistent clutch release on Mercedes-Benz 300D and 300TD manual transmission systems

Installation Notes and Tips

Use the included installation instructions during replacement. Because this unit is not pre-filled or pre-bled, the hydraulic system must be filled and bled after installation to remove air and restore proper pedal feel. Inspect the clutch hydraulic line, push rod connection, and slave cylinder condition before final assembly to avoid repeat service on Mercedes-Benz 300D and Mercedes-Benz 300TD applications.

Quality Assurance

LuK is part of Schaeffler’s clutch release system expertise, with a long history in hydraulic clutch technology. This new part is built as a service replacement for manual transmission clutch hydraulic repair.