One slipped O-ring or an uneven mallet strike can instantly compromise a fresh lower engine overhaul. The M20105 Liner Puller & Press Combo provides the uniform mechanical force required to pull and seat 5.5" bore wet liners safely.

The Dual-Function Advantage in Precision Rebuilding

On classic Cummins NT and N14 engine blocks, servicing wet cylinder liners is a high-accuracy, high-load operation. Over hundreds of thousands of operating hours, mineral scale accumulation and localized cavitation literally weld the liner walls into the lower block counterbores. Yanking out these stubborn cores using loose universal pulling fingers frequently scores the block's seating surfaces. Furthermore, installing fresh liners by hammering on a block or plate runs an immediate risk of chopping or twisting the critical lower fluid O-rings. The M20105 combo eliminates both vulnerabilities within one heavy-duty system. This specialized assembly applies centered, axial force to smoothly pull out frozen liners, and seamlessly transitions into a mechanical screw-press to press fresh sleeves flat down onto their seat landing blocks with micrometric precision.

• Application-Specific 5.5" Bore Engineering – Fabricated exclusively to fit the exact structural bore profile of Cummins NT and N14 heavy-duty commercial blocks.
• Unified Pull & Press Architecture – Eliminates tool bench clutter by handling both safe extraction and smooth mechanical installation within a single kit layout.
• Uncompromising O-Ring Defense – The press driver mechanism guides the liner vertically down into the block channels without letting the seal rings roll or shear.
• In-Frame Performance Optimization – Rigid, heavy-duty build allows line mechanics to comfortably run full sleeve replacements inside the frame rail.
• Industrial Strength Construction – Forged out of high-tensile premium tool alloys with a substantial 24.00 lbs profile built to endure continuous high-torque operational loads.

Eradicate Liner Drop and Fluid Contamination

The M20105 Cylinder Liner Service System is a baseline infrastructure requirement for independent diesel machine shops, commercial fleet truck operations, and long-haul transport maintenance bays. Protect your engine block from internal leaks and maintain absolute control over your liner protrusion heights.

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