Fuel Injection Pump for Yanmar 4TNV98 / 4TNV98T & Komatsu 4D98 Engine — 729968-51420 / 729974-51370

At over $1,500, a fuel injection pump is one of the most significant service investments on a Yanmar or Komatsu-powered machine — and one of the most critical. This brand-new original-spec pump is a direct bolt-on replacement covering a wide range of cross-reference part numbers for the Yanmar 4TNV98 and 4TNV98T engines, as well as the Komatsu 4D98. Precision-calibrated to match OEM flow rates, pressure output, and injection timing — restoring full power, fuel efficiency, and reliable cold starts.

Why Replace Your Fuel Injection Pump?

A failing injection pump causes hard starts, loss of power, excessive smoke, and rising fuel consumption. Left unaddressed, low fuel pressure accelerates injector wear and can cause catastrophic engine damage far more costly than the pump itself. A new pump is the right fix — and the most cost-effective way to protect your engine investment.

Compatible Engines

• Yanmar 4TNV98
• Yanmar 4TNV98T
• Komatsu 4D98

OEM Cross-Reference Part Numbers

729968-51420 | 72996851420 | 729974-51370 | 72997451370 | 729923-51330 | 72992351330 | 729948-51350 | 72994851350 | 729992-51300 | 72999251300 | 729926-51330 | 72992651330

What's Included

• 1 × Fuel Injection Pump

Key Specs

• ✅ Brand New Original Condition — Not remanufactured or refurbished
• ✅ OEM-Spec Calibration — Correct injection timing, flow rate, and pressure output
• ✅ Direct Bolt-On Fit — No modifications required; installs like the original
• ✅ Broad Cross-Reference Coverage — Replaces 12 OEM part numbers across Yanmar and Komatsu applications
• ✅ Protects Downstream Components — Proper fuel pressure prevents accelerated injector wear
• ✅ Eliminates Failure Symptoms — Resolves hard starts, power loss, excessive smoke, and high fuel consumption

Please verify your engine serial number and existing part number before ordering. Contact us for fitment confirmation if needed.