High-Strength Alloy Steel Injection Pump Drive Gear with Case-Hardened Surface and Z = 60 Teeth for Isuzu 4JH1 Engine

The Injection Pump Drive Gear (OEM Number: 8-97240051-2) is a premium-quality, direct replacement engine timing component designed for Isuzu 600P medium-duty trucks equipped with the 4JH1 diesel engine.

Injection pump drive gear transmits crankshaft rotation to the fuel injection pump, driving it at the correct speed and phase. Ensures precise injection timing for optimal combustion and fuel efficiency on Isuzu 4JH1 diesel engines.

• OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and reliable timing
• Precision Gear Teeth: Hobbed and ground for accurate tooth profile, quiet operation
• Case-Hardened: Surface hardness HRC 55-60 for exceptional wear resistance
• Precision Bore: Accurately machined with keyway for proper alignment
• Restores Injection Timing: Eliminates timing drift, improving power and fuel economy
• Direct Replacement: Matches OE gear dimensions - simple bolt-on installation
• Cost-Effective: Affordable genuine-quality part for injection pump repair

This injection pump drive gear is specifically designed for Isuzu 600P trucks with 4JH1 engine.

• ISUZU 600P (medium-duty truck, 4JH1 engine)
• May also fit other Isuzu models using the 4JH1 engine (e.g., NPR70, NKR) - verify compatibility

• 4-Cylinder, Inline Diesel, OHV, Turbocharged
• Displacement: 3.0L (2999cc)

Installation steps (overview):

1. Remove the front timing cover and any components blocking access
2. Remove the old injection pump drive gear (using a puller)
3. Inspect the idler gear and crankshaft gear for wear
4. Clean the injection pump shaft and keyway
5. Install a new key (if supplied) and slide the new gear onto the shaft
6. Install the retaining washer and nut, torque to specification
7. Re-time the injection pump according to the service manual (align timing marks)
8. Reinstall timing cover and associated components
9. Start engine and check injection timing with a timing light or scan tool

• Material Verification: Alloy composition and hardness tested
• Dimensional Inspection: Tooth profile, pitch diameter, bore size, and keyway verified
• Hardness Testing: Surface hardness (HRC 55-60) confirmed
• Magnetic Particle Inspection: 100% crack detection
• Visual Inspection: 100% checked for burrs or machining 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