Description
Tatan Machinery supplies professionally remanufactured Komatsu 3D68E diesel engine assemblies (OEM reference: 22A-01-11100) engineered specifically for Komatsu PC15-3 compact mini excavators. Built upon the robust Yanmar 3TNE68 core architecture, this compact 3-cylinder power unit is remanufactured strictly to OEM micrometer tolerances with 100% brand-new internal wear parts. This page details verified compact diesel specifications, tight-engine-bay failure diagnostics, workshop bench-testing, and critical installation advice for utility contractors, landscaping fleets, and mini equipment workshops.
Supplier Information & Build Status
| Supplier: | Tatan Machinery (Professional Excavator Parts Supplier) |
| Product Category: | Diesel Engine Assembly / Excavator Engine Parts |
| Engine Model: | Komatsu 3D68E-3 (Yanmar 3TNE68-EKM Base) |
| OEM Reference: | 22A-01-11100 (Alt: 119265-01330, 11926501330) |
| Engine Build Condition: | Professional Remanufactured to OEM Specs (100% Brand-New Wear Components, Tested Ready-to-Install) |
| Other Parts Condition: | All other excavator components on our site (Hydraulic Gear Pumps, Main Valves, Travel Motors) are 100% Brand New. |
| Target Machine: | Komatsu PC15-3 Mini Excavator |
🏢 Tatan Machinery Engine Staging & Workshop Facility
Physical inventory storage, mini excavator engine remanufacturing staging, and pre-export testing facility:
Physical inventory — ready for global crating. Video calls and warehouse visits welcome.
Technical Specifications
| Parameter | Specification Data |
|---|---|
| Displacement | 0.784 Liters (784 cc / 47.8 cu in) |
| Cylinder Configuration | Inline 3-Cylinder, 4-Stroke Mechanical Diesel |
| Bore × Stroke | 68 mm × 72 mm (2.68 in × 2.83 in) |
| Combustion & Fuel System | Indirect / Swirl Chamber with Mini Mechanical In-line Fuel Pump |
| Aspiration | Naturally Aspirated (Compact Engine Bay Profile) |
| Dry Engine Weight | Approx. 82 kg (180 lbs) Complete Assembly |
| Hydraulic Pump Interface | Flanged Flywheel Housing matched for PC15-3 Hydraulic Gear Pump |
| Standard Machine Match | Komatsu PC15-3 Mini Crawler Excavator |
Remanufacturing Standard: Precision Rebuilt for 3D68E
Small 3-cylinder diesel engines operate at sustained higher RPMs. They cannot survive on cheap salvage parts. Our 3D68E engines are rebuilt to exacting micrometer standards with 100% brand-new critical wear parts:
- Block & Head Core Verification: Cylinder block and cylinder head are chemically de-greased, decarbonized, and pressure-checked for thermal warping. Block fire deck surface precision ground.
- 100% Brand-New Wear Components: Brand-new 68mm pistons, complete piston ring sets, wrist pins, connecting rod bushings, crankshaft main bearings, rod bearings, and thrust washers.
- Valvetrain Overhaul: New intake and exhaust valves, ground valve seats, new valve guide stem seals, and new valve springs to restore full cylinder compression.
- 100% Brand-New Gasket & Seal Pack: Premium graphite head gasket, front and rear crankshaft oil seals, and water pump gaskets renewed to prevent weeping in tight compartments.
- Mechanical Fuel Pump & Injection Nozzles: Mechanical injection pump elements cleaned, calibrated, and nozzles pressure-tested for crisp atomization.
Common PC15-3 Engine Failure Triggers: Field Diagnosis
Because the Komatsu PC15-3 features an ultra-compact, tightly enclosed engine bay, failure patterns differ significantly from large 30-ton excavators:
- Overheating & Blown Head Gasket: Landscaping and trenching generate high dust and grass chaff that quickly clog the tiny aluminum radiator fins. Unnoticed overheating causes cylinder head thermal warping, white steam in exhaust, and compression blowing into the radiator.
- Frequent Short-Run Cold Starts & Bore Glazing: Utility mini excavators frequently run for just 10-15 minutes at a time. Incomplete combustion glazes cylinder walls, causes severe oil blow-by through the breather, and leads to hard starting when cold.
- Seasonal Fuel Stagnation & Pump Plunger Seizure: Machines parked over winter months suffer from bio-diesel gelling and water condensation, seizing the tiny mechanical fuel pump plungers and bending governor control forks upon spring startup.
- Connecting Rod Bearing Knock: Low oil volume (only ~2.5L capacity) combined with operating on steep trench slopes causes momentary oil pickup starvation, spinning rod bearings and scoring the crankshaft.
Workshop Testing Standards (Pre-Delivery Inspection)
Every remanufactured Komatsu 3D68E engine undergoes 5-step quality verification before packaging:
- Manual Crankshaft 720° Barring Test: Smooth rotation verification without valvetrain binding or mechanical interference.
- Mechanical Fuel Pump Timing & Plunger Check: Verification of fuel spill timing and injection nozzle atomization pattern.
- Lube Oil Gallery Pressure Priming: Pre-filling the oil circuit to confirm pressurized flow through main journals and valvetrain.
- Block & Head Pneumatic Leak Hold Test: Air hold test to guarantee cylinder head gasket and water jacket sealing integrity.
- Flywheel Coupler Concentricity Dial Check: Ensuring 100% true alignment for the hydraulic gear pump drive coupling.
📹 Live Sample Engine Workshop Inspection Video
Watch our workshop technician verify rotation, stamped serial numbers, and mounting ports:
✓ Real physical unit filmed at Tatan Machinery workshop
Export Heavy-Duty Packaging Process
Although compact, the 3D68E is packed to full industrial export standards to survive rough ocean and air cargo transit:
- Internal & External Anti-Rust Preservation: All raw machined surfaces, crankshaft snout, and flywheel teeth coated with high-grade anti-corrosion grease.
- Dust Caps on All Openings: Intake manifold, exhaust elbow, water inlets, and fuel feed fittings sealed with heavy-duty protective plugs.
- Direct Sump-Skid Bolting: The engine is anchored securely to heavy timber base skids through rigid mounting brackets.
- ISPM 15 Fumigation-Free Solid Crate: High-density export plywood crate secured with galvanized steel strapping.
Actual export wooden crate packaging and internal skid bracing for 3D68E
Global Shipping & Customs Documentation
Fast, reliable dispatch tailored for commercial contractors and parts wholesalers worldwide:
- Emergency Machine Down (AOG Freight): Priority air cargo via DHL Aviation, FedEx Heavy Cargo, or direct airline belly freight within 3–7 business days.
- Ocean Container Freight (LCL / FCL): Consolidated container shipping to all major commercial seaports worldwide.
- Complete Export Documents: Commercial Invoices with correct HS Code (8408.20), Packing Lists, and Certificates of Origin for smooth customs clearance.
Container loading and air freight dispatch supported by global logistics partners
Critical Installation Guidelines (PC15-3 Mechanic Checklist)
Because the PC15-3 has an extremely tight engine bay, field mechanics MUST follow these procedures during installation:
- Deep Radiator Core Debris Blowout: You MUST remove the radiator from the machine and thoroughly back-flush the cooling fins with compressed air and degreaser. Installing a fresh engine with a partially clogged mini-radiator will blow the new head gasket on day one!
- Hydraulic Gear Pump Spline Coupling: When remounting the hydraulic gear pump to the flywheel housing, align the spline coupler by hand. NEVER pull the pump tight with bolts if the splines have not fully engaged, or you will crush the pump drive seal!
- Mini Fuel System Air Bleeding: The 3D68E mechanical pump has small fuel delivery passages. Bleed the fuel filter base and pump inlet bleeder screws until no foam appears. Dry-cranking on small 12V mini-excavator batteries will quickly burn out the starter motor!
- Engine Bay Clearance Check: When lowering the engine on its rubber mounts, ensure the throttle cable, alternator wiring, and lower radiator hose do not rub against the counterweight or boom swing cylinder bracket.
- Initial Oil Fill & Filter Priming: Pre-fill the new spin-on oil filter with 10W-30 or 15W-40 diesel oil. Crank the engine with the stop solenoid disconnected until the oil pressure light extinguishes before running at working RPM.
Buyer Frequently Asked Questions (Purchasing FAQ)
Q: Is this Komatsu 3D68E engine brand new or remanufactured? Is it identical to a Yanmar 3TNE68?
A: This engine assembly is professionally remanufactured strictly to Komatsu/Yanmar OEM tolerances. Komatsu 3D68E is built on the proven Yanmar 3TNE68 engine platform. We do NOT sell junkyard salvage pulls. The cylinder block and head are sonically cleaned and crack-tested, and 100% of internal wear parts (pistons, rings, bearings, valves, and full seal kits) are replaced with brand-new parts. It provides OEM-level performance at a fraction of the dealer price.
Q: Are your hydraulic pumps and other mini excavator parts remanufactured too?
A: No. Only our diesel engine assemblies are professionally remanufactured. All other Komatsu PC15-3 replacement components—including the hydraulic gear pump, main control valve, final drive travel motors, and rubber tracks—are 100% Brand New (OEM-Grade Aftermarket) ready for immediate field installation.
Q: How do you guarantee the engine matches my PC15-3 hydraulic pump and throttle linkage?
A: Komatsu PC15-3 configurations can differ in bellhousing depth or stop-solenoid connector styles depending on production year. Send your machine’s serial number plate and photos of your old engine’s pump mounting face to Gavin. We cross-verify the exact parts arrangement in the official Komatsu parts system within 10 minutes.
Q: Can I see live photos and stamped block numbers of the actual engine before paying?
A: Absolutely yes. Prior to balance payment and dispatch, we send clear photos and live video of the specific unit assigned to your order. You will see the stamped serial numbers, mechanical injection pump tags, flywheel teeth, and the complete wooden box packaging process.
Q: What happens if the crate is damaged during sea freight, and what customs paperwork do you provide?
A: Every shipment from Tatan Machinery is protected by full commercial marine cargo insurance. The engine is bolted down directly onto internal skids within a fumigation-free solid plywood crate. We supply commercial invoices with accurate HS Codes (8408.20), detailed packing lists, and Certificates of Origin for smooth customs clearance at your destination port.
🔗 Frequently Purchased Together with Komatsu PC15-3 Diesel Engine:
- MAIN VALVE:
Main Control Valve Assembly for Komatsu PC15-3 Excavator
100% Brand New - HYDRAULIC PUMP:
Main Hydraulic Gear Pump Assembly for Komatsu PC15-3
100% Brand New - TRAVEL MOTOR:
Final Drive Travel Motor Assembly for Komatsu PC15-3
100% Brand New - BRAND CATALOG:
View All Komatsu Excavator & Heavy Equipment Parts Collection
Get Wholesale Factory Quote for 3D68E 22A-01-11100 Engine
Looking for direct factory pricing, stock availability, or technical verification for Komatsu 3D68E engines? Contact senior specialist Gavin now!
💡 Fast Quote: Send your engine serial number or nameplate photos for an accurate match within 10 minutes!
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote based on freight destination and configuration.
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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