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Extracting stubborn wet or dry cylinder liners during engine overhauls on heavy-duty diesel engines using Apex or Kent-Moore Universal Liner Pullers (M50010 series)? Attempting to pull carbon-bound or press-fit cylinder sleeves with worn, rounded, or thin puller feet (fingers) causes slippage off the lower liner flange ledge. A slipping puller foot pop-off gouges precision cylinder block bores, deforms sleeve bottom landing shoulders, and dumps metal shavings into internal oil passages. Engineered for heavy-duty commercial repair facilities, fleet overhaul bays, and engine rebuild shops as a direct precision replacement set, the M50010-20 Thick Replacement Feet (Set of 2) with retaining screws delivers maximum mechanical engagement and pull force for high-stress liner extraction.

The Critical Physics of Flange Engagement & Mechanical Extraction Force Transfer

Heavy-duty diesel cylinder liners are installed with tight interference fits and exposed to intense combustion heat, soot buildup, and coolant scale over hundreds of thousands of miles. During engine overhauls, pulling these sleeves requires tremendous upward axial force transmitted through the spring-loaded lower feet (fingers) of a Universal Liner Puller. As the forcing screw is tightened, the puller feet pivot outward to hook under the bottom lip of the cylinder liner flange. When original feet become worn, rounded, or bowed from repeated high-tonnage extractions, the contact surface area drops dramatically. Under heavy load, worn feet deflect and slip off the narrow liner ledge. Slipping feet strike the engine block bore with immense force, deeply scoring precision block walls and requiring expensive sleeve sleeve-press sleeve repairs or complete block replacement. The M50010-20 Thick Replacement Feet Set restores peak mechanical grip and tool stability. Precision-machined from high-strength alloy tool steel, these thick feet feature enlarged landing shoulders that grip maximum flange surface area. Included with new mounting screws, the M50010-20 set installs directly onto Apex and Kent-Moore universal liner puller assemblies, ensuring dead-straight 360-degree force distribution to pop stuck liners free cleanly without bore contact or tool failure.

• Universal Compatibility Across Major Tool Brands – Designed as direct replacement gripping feet (fingers) for Apex M50010 series and Kent-Moore Universal Liner Pullers.
• Thickened Contact Geometry for High-Load Grip – Engineered with thicker contact ledges to deliver maximum leverage and pull force on stubborn, carbon-bound cylinder sleeves.
• Complete Replacement Package with Mounting Hardware – Includes a matched set of 2 thick steel feet and precision mounting screws for immediate shop installation.
• Protects Precision Engine Block Bores – Prevents puller slippage, pop-offs, and deep bore scoring by maintaining positive mechanical engagement under maximum force.
• Heavy-Duty Heat-Treated Tool Steel Build – Manufactured from high-tensile alloy steel engineered to withstand continuous high-tonnage extraction cycles in demanding shop bays.

Stop Slipping Off Liner Flanges. Restore Total Universal Liner Puller Performance.

The M50010-20 Thick Set of 2 Replacement Feet (Finger) For Universal Liner Puller is an essential, low-cost maintenance asset for commercial truck repair centers, fleet maintenance facilities, and heavy diesel rebuilders. Restore your liner puller's mechanical grip, protect expensive engine blocks, and extract cylinder sleeves with complete mechanical authority using Apex tools.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Tool Assemblies	Apex M50010 Series & Kent-Moore Universal Liner Pullers
Primary Operational Function	Replacement lower gripping fingers for cylinder liner flange extraction
Kit Contents	Set of 2 Thick Steel Replacement Feet (Fingers) + 2 Retaining Screws
Part / Model Reference Number	M50010-20 (M5001020 / 50010-20)
Construction Metallurgy	High-tensile precision-machined heat-treated alloy steel
Total Package Shipping Weight	1.00 lb (Compact, essential replacement component set)

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