9Y-4124 Piston Body for 3304 3306 3306B Engine | Cross Ref 7W0552 9Y4124

Product Overview

The 9Y-4124 Piston Body Assembly is a high-performance engine component designed for Caterpillar 3300 and select 3400 series diesel engines. Engineered for heavy-duty industrial and construction applications, this piston ensures optimal thermal expansion control and high-pressure resistance. It is a direct replacement for the legacy part number 7W-0552, providing a reliable solution for engine overhauls.

Part Numbers & Cross-Reference

Compatible with the following Caterpillar (CAT) part numbers:

• Main Part Number: 9Y-4124 / 9Y4124
• Superseded Number: 7W-0552 (7W0552)
• Related Reman Numbers: 0R-3200 (0R3200)  |  0R-8153 (0R8153)
• Condition: Brand New Aftermarket Replacement

Technical Specifications

• Material: High-Strength Aluminum Alloy (heat-treated for maximum durability)
• Design: Body AS-Piston (Standard Size)
• Piston Pin Type: Full Floating
• Weight: Approx. 4.6 lbs (2.1 kg)
• Features: Ni-Resist ring inserts for reduced groove wear and improved oil control

Applications & Engine Compatibility

Widely used across Caterpillar's medium-duty and industrial engine range:

• Compatible Engine Models: CAT 3304, 3304B, 3306, 3306B, 3406
• Excavators: 235, 235B, 235C, 330, 330L
• Track-Type Tractors: D6D, D6E, D6G, D6H, D7G, D7H
• Wheel Loaders: 966C, 966D, 966E, 966F, 966G
• Motor Graders: 12G, 14G, 140G, 140H
• Industrial: Marine engines, Generator sets, and Articulated trucks (D250, D300)

B2B Export Advantage

• Precision Engineering: Built to exact OEM dimensional tolerances for perfect fit and long-term reliability.
• Wholesale Supply: Competitive pricing for international distributors, engine repair shops, and fleet owners.
• Export Ready: Anti-rust treatment and reinforced packaging for safe international transit via air or sea.