High-strength alloy steel oil pump drive pinion heat-treated HRC 50-55 direct OEM replacement for Isuzu NPR 4BD1 engine

The Oil Pump Drive Pinion (OEM Numbers: 8-94130420-0 / 8941304200) is a premium-quality, direct replacement engine lubrication component designed for Isuzu NPR medium-duty trucks equipped with the 4BD1 diesel engine (3.9L).

• OE Quality: Manufactured to Isuzu dimensional and material specifications
• Precision Gear Teeth: Hobbed and ground for smooth, quiet operation
• Heat-Treated: HRC 50-55 surface hardness for wear resistance
• Restores Oil Pressure: Eliminates low oil pressure caused by worn drive gears
• Direct Replacement: Matches OE tooth profile and mounting
• Cost-Effective: Affordable alternative to genuine OEM gears

This oil pump drive pinion is specifically designed for Isuzu NPR trucks with 4BD1 engine.

• ISUZU NPR (NPR59, NPR66, etc. with 4BD1)
• May also fit other Isuzu engines using the same oil pump drive system - verify

• 4-Cylinder, Inline Diesel
• Displacement: 3.9L (3856cc)

Installation steps (overview):

1. Remove the oil pan and access the oil pump assembly
2. Remove the old oil pump drive pinion from the crankshaft or pump shaft
3. Clean the shaft and keyway
4. Install the new pinion, aligning the key or spline
5. Torque retaining bolt/nut to specification
6. Reassemble oil pump and oil pan with new gasket
7. Refill engine oil, prime the system, and start engine
8. Check oil pressure

• Material Verification: Alloy composition and hardness tested
• Dimensional Inspection: Tooth profile, bore diameter, and runout verified
• Hardness Testing: Surface hardness (HRC 50-55) confirmed
• Visual Inspection: 100% checked for defects
• Packaged Safely: Coated with anti-rust oil, wrapped in plastic, boxed with foam

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea