Description
SAA6D125E-3 6156-01-1100 Engine Assembly by Tatan Overview
The SAA6D125E-3 6156-01-1100 Engine assembly manufactured by Tatan is a heavy-duty inline 6-cylinder, 11.04-liter industrial diesel powerplant belonging to our Diesel Engine Assembly classification. Engineered specifically for Komatsu PC400-7, PC400LC-7, and PC450-7 40-ton mining excavators, replacing your failed or cracked engine with a Tatan complete turnkey assembly eliminates wet-liner cavitation leaks, restores 246 kW (330 HP) continuous rock-trenching power, and cures low hot idle oil pressure across demanding quarry and mining applications.
Driving the excavator’s HPV165 hydraulic pump and distributing fluid through the PC400-7 main control valve, this complete diesel engine incorporates an induction-hardened forged steel crankshaft, heavy-wall wet cylinder sleeves, internal gallery-cooled pistons, and a wastegated turbocharger, ensuring 100% direct bolt-on installation with flywheel housings and chassis mounts.
Key Attributes & Technical Parameters for SAA6D125E-3 6156-01-1100 Engine
| Product Category | Diesel Engine Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Komatsu SAA6D125E-3 Heavy-Mining Engine | Brand Name | Tatan |
| Compatible Equipment | Komatsu PC400-7 | PC400LC-7 | PC450-7 | OEM Part Number | 6156-01-1100 / 6156-01-1110 |
| Matched Engine Series | Komatsu SAA6D125E-3 Industrial Diesel | Place of Origin | Guangdong, China |
| Max Relief Pressure | 246 kW (330 HP) @ 1850 RPM Rated | Pilot Control Pressure | 11.04 Liters (125mm × 150mm) |
| Spool Precision Spec | Wet Liner < 0.003 mm Tolerance | Quality Status | 100% Brand New Turnkey Assembly |
| Machinery Test Report | Provided (100% Bench Dyno Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | 15W-40 Heavy-Duty Diesel Engine Oil | Packaging | Export Wooden Box Packaging |
Supported Excavator Machinery Brands & Powertrain Lineup
In addition to Komatsu, Tatan manufactures replacement complete diesel engines, cylinder blocks, and overhaul components for major excavator brands:
45-Ton Heavy Mining Powertrain Standards & Large-Displacement Engine Engineering
Operating 40~45 ton production excavators with 2.5 m³ buckets in abrasive rock quarries demands extreme thermal durability and massive low-end torque. Tatan delivers heavy-duty complete diesel engines engineered with heavy-wall wet sleeves, gallery-cooled pistons, and forged alloy crankshafts across international earthmoving fleets:
🛡️ Anti-Cavitation Wet Sleeves
Centrifugally cast alloy iron wet sleeves with reinforced viton packing prevent vibration pitting and coolant contamination into the sump.
🔥 Reinforced Cylinder Head
High-tensile alloy iron heads with reinforced valve bridges resist thermal fatigue cracking under continuous 246 kW full-load digging.
🛢️ High-Flow Lube System
Heavy-duty 11-plate oil cooler and high-flow oil pump maintain hot oil pressure above 0.38 MPa across all 125mm main journals.
Application Scenarios & Buyer Value
When upgrading or replacing your 40-ton excavator powerplant with our SAA6D125E-3 6156-01-1100 Engine, buyers achieve maximum operational uptime and flow control:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu PC400-7 Engine Replacement | 1:1 direct bolt-on installation eliminates cylinder blow-by and restores 246 kW power for simultaneous boom, arm, and swing speeds. |
| Hydraulic Overhaul Workshops | Avoids the complex labor of block line-boring and fuel pump timing; saves mechanic hours with a pre-timed, dyno-tested unit. |
| Mining & Quarry Fleet Operations | Reinforced forged pistons and multi-layer steel head gasket withstand continuous heavy rock-breaker hammer operations. |
| Heavy Equipment Parts Stockists | Fast-moving, high-demand 40-ton engine inventory ready for immediate shipment to minimize customer downtime. |
SAA6D125E-3 6156-01-1100 Engine OEM Diagnostic & Troubleshooting Guide
Use this OEM manual diagnostic guide to troubleshoot SAA6D125E-3 engine symptoms on your Komatsu PC400-7 excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Engine oil turns milky & oil level rises in pan | Wet cylinder liner lower viton O-ring degradation or cavitation pitting eroding through the cylinder sleeve wall under high vibration. | Replace with Tatan 6156-01-1100 complete engine assembly fitted with brand-new cavitation-resistant wet sleeves and viton seals. |
| 2. Low oil pressure warning (< 0.12 MPa) at hot idle | Excessive crankshaft journal and connecting rod bearing clearance, or worn oil pump gears losing delivery volume under 246 kW heat. | Install Tatan new engine with induction-hardened forged journals maintaining > 0.38 MPa hot running pressure. |
| 3. Excessive blue-gray smoke & oil blow-by from breather tube | Piston top keystone ring groove carbon-welded or broken compression rings allowing combustion gas blow-by into the crankcase. | Install Tatan new SAA6D125E-3 diesel engine; flush intercooler piping and replace primary air intake filter elements. |
| 4. Heavy black smoke & engine bogging under 2.5 m³ bucket load | Wastegated turbocharger shaft drag or injection pump governor timing slip causing boost pressure loss (< 190 kPa). | Inspect turbo boost pressure, verify injection timing, or drop in complete replacement turnkey engine assembly. |
Transport Packaging & Certified Manufacturing Standards
Complete 11.04-liter diesel engines require absolute vibration and moisture isolation. Every Tatan PC400-7 engine undergoes anti-corrosion fogging, heat-sealed plastic wrap, and solid timber export crating:
SAA6D125E-3 6156-01-1100 Engine FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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