Multiquip 71429522540 Ring Set OS=.025 L48V/86D - OEM Replacement Part

This oversize piston ring set provides a precision replacement solution for Yanmar L48V6 diesel engines that have experienced cylinder wear beyond standard tolerances. Manufactured to .025" oversize specifications, this ring set enables technicians to restore proper compression and engine performance during overhaul procedures on tamping rammer powerplants.

The Yanmar L48V6 engine powers the MT-76D2 and MT-86D2 tamping rammers, delivering 13.3 cubic inches (219cc) of displacement in an air-cooled 4-stroke diesel configuration. When cylinder bore measurements exceed standard specifications due to normal wear or scoring, this oversize ring set allows for cylinder boring and honing to restore proper piston-to-cylinder wall clearances. Proper ring installation is critical for maintaining the engine's 3,300 RPM maximum governed speed and ensuring reliable compression for diesel combustion.

During engine overhaul, symptoms indicating the need for oversized rings include excessive blow-by, poor compression readings, increased oil consumption, and difficulty starting. This ring set must be installed following proper cylinder boring procedures and torque specifications outlined in the Yanmar engine service manual.

Compatible with the following Multiquip tamping rammer models:

• MT-76D2 Tamping Rammer
• MT-86D2 Tamping Rammer

Genuine Multiquip OEM part, sold by an authorized dealer.