150107-005420 Engine Crankshaft for Doosan D34, D34D, D34P, D34NAP

   The 150107-005420 is a high-strength, forged steel crankshaft precision-machined for the Doosan D34 4-cylinder engine family. Whether the engine is the turbocharged D34D, the performance-tuned D34P, or the naturally aspirated D34NAP, this crankshaft provides the structural integrity required to convert thermal energy into mechanical power. It features induction-hardened journals and micro-finished bearing surfaces to minimize friction and ensure a long service life in industrial environments.

The SPARKLING MACHINERY NEW 150107-005420 Crankshaft Photo:

Why Choose the SPARKLING 150107-005420 Crankshaft?

• • • • • • • • • • • • • • • • • • • • • • • •    - Universal D34 Compatibility: Engineered to fit all primary variations of the D34 3.4L platform, including turbocharged and non-turbo models.

                                              •    - Enhanced Durability: Forged construction provides superior resistance to fatigue and high-torque stresses compared to cast alternatives.

                                              •    - Balanced Performance: Counterweights are factory-balanced to reduce harmonic vibrations, protecting the engine block and transmission components.

                                              •    - OEM Specification: Matches all technical dimensions of the original 150107-005420, including gear mesh and oil passage alignment.

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                                          • Compatible Doosan D34 Engine Variations

                                            This crankshaft is the standard replacement for the following engine models:

                                            Engine Model	Aspiration Type	Typical Application
                                            D34 / D34D	Turbocharged	Bobcat Skid Steers (S770, S850)
                                            D34P	High-Performance	Doosan Compact Excavators
                                            D34NAP	Naturally Aspirated	Forklifts & Stationary Power

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Q&A Section

Q1: How do I distinguish the 150107-005420 from other D34 crankshafts?

A: While the D34 engines are similar, the 150107-005420 is specifically designed for the Tier 4 Final configurations. Always cross-reference the part number with your specific engine serial number to ensure the timing gear and oil seal surfaces are identical.

Q2: Does this crankshaft come with the main bearings or timing gear?

A: Generally, the crankshaft is sold as a standalone unit. Because bearing clearances are critical, it is highly recommended to purchase a new set of Standard (STD) main bearings and a new timing gear at the time of installation.

Q3: Can a 150107-005420 crankshaft be turned/reground if damaged?

A: If the journals are lightly scored, they can often be reground to an undersize (e.g., 0.25mm). However, for Tier 4 high-torque engines, many manufacturers recommend replacement rather than grinding to maintain the integrity of the induction-hardened surface.

About SPARKLING MACHINERY:
   - Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.

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