Yanmar 129004-11650 Rocker Arm Assembly

The Yanmar 129004-11650 rocker arm assembly is a critical valve train component engineered for Yanmar TNV and TNE series industrial diesel engines. It converts camshaft rotation into linear valve stem movement to control intake and exhaust valve timing. Manufactured to OEM specifications using forged steel or high-strength cast iron for wear resistance and fatigue strength under high-cycle engine operation. This assembly fits Yanmar 4TNE88, 4TNV88, 4TNE84, 4TNV84, 3TNE88, and 3TNV88 engine models. Common applications include Komatsu PC30MR-3, PC35MR-3 and Hitachi ZX30U-3F, ZX33U-3F, ZX35U-3F, ZX38U-3F mini excavators. Direct interchange for Komatsu part number YM129004-11650 and Hitachi reference YNM129004-11650. Installation requires valve clearance adjustment per service manual specifications.