Multiquip 28423403H3 Piston 0.50 Oversized - OEM Replacement Part for Rammers

This oversized piston assembly provides a precision-engineered replacement solution for worn or damaged engine cylinders in Multiquip tamping rammers. The 0.50mm oversize design allows technicians to restore compression and power output in engines that have been rebored to accommodate cylinder wear, eliminating the need for complete engine replacement. Designed specifically for the MTR40F Tier 2 engine platform, this piston maintains the critical bore and stroke specifications required for optimal performance in high-impact compaction applications.

Multiquip tamping rammers operate at 3,600 rpm delivering 600-695 impacts per minute with forces exceeding 2,000 lbs per blow. This demanding duty cycle requires precise piston-to-cylinder clearances to maintain compression ratios and prevent blow-by. Symptoms of piston wear include reduced impact force, excessive oil consumption, hard starting, and blue exhaust smoke. When reboring cylinders during overhaul procedures, proper piston sizing is critical to restore factory specifications and ensure reliable operation under load.

This piston is compatible with the following Multiquip rammer models:

• MT55F Tamping Rammer
• MTR40F Rammer
• MTR40SF Rammer

Genuine Multiquip OEM part, sold by an authorized dealer.