VH13610E0052 Injection Shaft Assy

Product Overview

The VH13610E0052 Injection Pump Drive Shaft Assy is a critical fuel system component engineered for the Hino J08E diesel engine used in Kobelco SK330-8 and SK350LC-8 excavators. This drive shaft assembly, also known as the fuel supply pump drive shaft or injection pump driveshaft, transmits rotational power from the engine timing gear train to the fuel supply pump, enabling high-pressure fuel delivery for the common rail injection system .

The Kobelco SK330-8 and SK350LC-8 are 33-35 ton class large excavators powered by the Hino J08E-TM engine—a 6-cylinder, 7.684-liter turbocharged diesel with intercooler producing 197 kW (268 HP) at 2,100 rpm . The J08E engine utilizes a Denso common rail fuel system, where the supply pump pressurizes fuel to the rail for distribution to the injectors .

The injection pump drive shaft assembly includes the shaft, coupling components, and timing gear connection. The engine drives the supply pump at a ratio of 1:1, and the internal camshaft operates the plungers that pressurize fuel . When the drive shaft fails due to wear, spline damage, or bearing failure, the engine may experience fuel pressure loss, rough running, hard starting, or complete shutdown. Replacing a worn or damaged drive shaft with this OEM VH13610E0052 assembly restores proper fuel pump operation.

Key Features

• OEM Specification Compliance: Manufactured to meet Hino’s exact dimensional and material specifications for the J08E engine fuel system.

• Precision Splines: Machined splines ensure positive engagement with the timing gear and supply pump drive coupling.

• Integrated Bearing Surfaces: Precision-ground bearing journals for smooth rotation and long service life.

• Direct Replacement: Matches OEM part number VH13610E0052 for a perfect fit with no modifications required.

• Heat-Treated Construction: Manufactured from hardened alloy steel to resist torsional stress and wear.

• Essential for Fuel System: Transmits engine power to the supply pump, enabling common rail fuel pressurization.

Compatibility

This injection pump drive shaft assembly is a direct OEM replacement for the following applications:

Compatible Excavator Models

• Kobelco SK330-8

• Kobelco SK350LC-8

Engine Compatibility

• Hino J08E-TM (6-cylinder, 7.684L, turbocharged with intercooler) 

• Hino J08E family engines

Part Number Reference

Also Known As: Injection Pump Drive Shaft, Fuel Supply Pump Shaft, Fuel Pump Drive Shaft, Injection Pump Driveshaft, Fuel Pump Coupling Shaft

Please verify your engine model and compare with your original part before purchasing.

How the Injection Pump Drive Works in the J08E Engine

Common Rail Fuel System Overview

The Hino J08E engine uses a Denso common rail fuel system. The supply pump consists primarily of the pump body, camshaft, ring cam, plungers, SCV (Suction Control Valve), fuel temperature sensor, and feed pump .

Drive Shaft Function

The injection pump drive shaft is the mechanical link between the engine timing gear train and the fuel supply pump. The engine drives the supply pump at a ratio of 1:1 . As the drive shaft rotates, the internal camshaft moves the plungers to pressurize fuel sent to the rail .

Power Transmission Path

1. Engine crankshaft rotation

2. Timing gear train

3. Injection pump drive shaft (VH13610E0052)

4. Supply pump internal camshaft

5. Plunger pressurization

6. Fuel delivery to common rail

The quantity of fuel supplied to the rail is controlled by the SCV using signals from the engine ECU .

Signs Your Injection Pump Drive Shaft Needs Replacement

The drive shaft can fail due to spline wear, bearing failure, or torsional fatigue. Replace your VH13610E0052 drive shaft if you observe:

1. Fuel Pressure Loss: The engine lacks power or runs poorly due to insufficient fuel pressure from the supply pump.

2. Rough Running: The engine runs unevenly or misfires, indicating inconsistent fuel delivery.

3. Hard Starting: Extended cranking time before the engine starts, often due to low fuel pressure.

4. Unusual Noise: Grinding or rattling sounds from the timing gear or fuel pump area, indicating worn bearings or splines.

5. Metal Particles in Fuel System: Metal debris in the fuel filters or supply pump, indicating internal wear.

6. During Fuel Pump Service: When overhauling or replacing the fuel supply pump, inspect and replace the drive shaft as needed.

7. During Major Overhaul: Any comprehensive engine rebuild should include inspection of the injection pump drive components.

8. Visible Wear: Worn splines, scoring on bearing surfaces, or heat discoloration.

Benefits

Why choose our VH13610E0052 Injection Pump Drive Shaft for your J08E engine?

1. Restores Fuel System Function: A new drive shaft ensures proper power transmission to the supply pump for correct fuel pressurization.

2. Eliminates Play: Replaces worn splines and bearings that cause timing and pressure instability.

3. Essential for Overhaul: Any fuel system service or engine rebuild requires inspection and replacement of wear components.

4. Prevents Contamination: Replacing a worn shaft prevents metal debris from entering the fuel system.

5. Protects the Supply Pump: A properly functioning drive shaft prevents coupling misalignment that could damage the pump.

6. OEM-Quality Assurance: Manufactured to meet or exceed original equipment standards.

Installation Tips

• Professional Installation Required: Injection pump drive shaft replacement requires timing gear access and proper alignment procedures. Professional installation is mandatory.

• Inspect Timing Marks: Before removal, mark the timing gear alignment to ensure correct reassembly.

• Check the Drive Coupling: Inspect the coupling between the drive shaft and supply pump for wear or damage.

• Replace Associated Seals: Always replace O-rings and seals when servicing the timing gear area.

• Lubricate Before Assembly: Apply clean engine oil to the shaft and bearing surfaces during installation.

• Use Correct Torque: Follow the J08E service manual for timing gear bolt torque specifications.

• Verify Rotation: After installation, verify the shaft rotates freely and engages the timing gear correctly.

• Prime the Fuel System: After reassembly, prime the fuel system before starting the engine.

Why Choose Our VH13610E0052 Injection Pump Drive Shaft?

We understand that the Hino J08E engine in your Kobelco SK330-8 or SK350LC-8 excavator relies on precise fuel system operation for reliable performance. The injection pump drive shaft is a critical mechanical link between the engine and the fuel supply pump, and wear in this component can cause fuel pressure issues that are difficult to diagnose.

Our VH13610E0052 Injection Pump Drive Shaft Assy is manufactured to OEM specifications with proper spline geometry, heat treatment, and dimensional accuracy. Whether you are performing fuel system service, replacing a worn drive shaft, or completing a major engine overhaul, this direct-fit shaft provides the reliable power transmission your J08E engine requires.

Technical Specifications

Order your VH13610E0052 J08E Injection Pump Drive Shaft Assy today and restore proper fuel system performance to your Kobelco SK330-8 or SK350LC-8 excavator. In stock and ready for immediate worldwide shipping. Bulk pricing available for engine overhaul kits and fleet maintenance.