Komatsu 4D94E Crankshaft for PC30 PC35 PC40 eliminates the Main journal fatigue cracking often grounding PC40 Engine Parts fleet operations, providing a precision-machined 4D94E Forging Crankshaft that restores factory-grade engine compression and long-term reliability
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Featuring precision-forged steel and high-frequency induction hardening, this Komatsu 4D94E Crankshaft is engineered to restore factory-grade rotation to your 4D94E diesel powerplants. Within our Industrial Diesel Engine Parts wholesale catalog, this component serves as a critical 4D94E Forging Crankshaft solution for contractors managing compact excavator fleets. Our manufacturing process focuses on grain flow optimization to ensure the shaft can withstand the high-torque demands of modern hydraulic systems.
This Komatsu 4D94E Crankshaft for PC30 PC35 PC40 is specifically designed to address chronic mechanical issues such as Main journal fatigue cracking, which often results from sustained heavy loading in earthmoving applications. By utilizing this 4TNE94 Replacement grade component, fleet owners can eliminate engine vibration and prevent catastrophic bottom-end failure. Whether you are performing a standard overhaul or an emergency repair, our units provide the dimensional accuracy required for immediate bulk dispatch and maintenance supply.
| Product Name | Komatsu 4D94E Crankshaft |
| Engine Model | 4D94E / 4TNE94 |
| OEM Reference | YM129900-02020 / 129900-02020 |
| Application Category | Industrial Diesel Engine Parts |
| Material Construction |
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| Technical Attributes |
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Technician’s Note: When replacing a 4D94E crankshaft, always measure the main journal diameter against OEM specs. Main journal fatigue cracking is often a secondary symptom of oil pump wear or restricted oil galleries; ensure the entire lubrication system is flushed and the oil pump pressure is verified during the rebuild to protect the new forging.
| Engine Model | Application Field | Equipment Models |
|---|---|---|
| 4D94E | Compact Excavators |
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| 4D94E / 4TNE94 | Mini Excavators & Loaders |
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Ruich Value is a leading supplier of heavy-duty engine internals for the construction sector. While this 4D94E unit is a core item, our catalog features a wide range of Industrial Diesel Engine Parts for the entire Komatsu engine family.
Category coverage: We supply forged and cast crankshafts, main bearings, and connecting rods for PC, WA, and D-series machinery.
| Engine Model | Primary Part Number | Machine Model |
|---|---|---|
| S4D95 | 6204-33-1100 | PC60-5 WA150 Loader |
| S4D102 | 6732-31-1100 | PC120-6 PC100-6 Excavator |
| S6D95 | 6207-31-1100 | PC200-5 PC200-6 Excavator |
| S6D102 | 6735-01-1310 | PC200-6 PC200-7 Excavator |
| S6D105 | 6136-31-1110 | PC200-3 Excavator |
| S6D107 | 6754-01-1310 | PC200-8 Excavator |
| S6D108 | 6222-31-1110 | PC300-6 Excavator |
| S6D110 | 6138-31-1110 | PC220-5 GD605 Grader |
| S6D114 | 6742-01-1570 | PC300-7 PC300-8 Excavator |
| S6D125 | 6151-31-1110 | PC400-3 PC400-5 Excavator |
| S6D140-2 | 6211-31-1010 | PC600-6 Excavator |
| S6D140-3 | 6217-31-1010 | PC750-6 PC800 Excavator |
| S6D140-5 | 6261-31-1200 | PC800-8 PC850-8 Excavator |
| S6D155 | 6127-31-1012 | D155A-2 Bulldozer |
| NT855 | 6710-31-1111 | D85 Bulldozer |
| NH220 | 6623-31-1111 | D60 Bulldozer |
| S6D170 | 6245-31-1100 | PC1250-7 Excavator |
| 4D95L | 6204-31-1201 | PC60 PC75 Excavator |
| 4D94E/4TNE94 | - | PC30 PC35 PC40 Excavator |
View all specs in our Komatsu Industrial Crankshaft Catalog.
A: Yes, in most industrial applications, the Komatsu 4D94E and Yanmar 4TNE94 share the same crankshaft architecture. However, Ruich Value recommends verifying the rear flange bolt pattern and gear teeth count, as some generator-spec units may vary from excavator configurations.
A: Typically, our crankshafts are supplied as the bare forged shaft. If your application requires the timing gear to be pre-pressed, please specify this during your quote request so our technical team can ensure the correct interference fit.
A: We recommend using high-quality assembly lube on all journals. Before the first start, crank the engine with the fuel cut off until oil pressure is established. This is the best practice for any new Industrial Diesel Engine Parts installation.
Note: Customized/billet development based on drawings or samples is also available for high-performance or obsolete engine applications.
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