Description
4M40 ME996860 Diesel Engine Assembly for Caterpillar 307 Excavator
4M40 ME996860 Diesel Engine Assembly Overview
The 4M40 ME996860 Engine assembly manufactured by Tatan is a 2.835-liter inline 4-cylinder water-cooled industrial diesel powerplant belonging to our Diesel Engine Assembly classification. Engineered specifically for Caterpillar CAT 307, 307B, 307C, 307C SB, and 307D 7-to-8-ton compact excavators, replacing your worn or failed engine core with a Tatan complete turnkey assembly stops crankcase oil spitting, restores 43.0 kW (57.6 HP) rated output at 2100 RPM, and cures hot-idle oil pressure loss under continuous hydraulic pump load.
Coupled directly to the machine’s main hydraulic pump and governing the KMX13 main control valve, this 4M40 ME996860 Engine incorporates an induction-hardened forged steel crankshaft, a crossflow cylinder head with pre-combustion swirl chambers, an internal trochoid gear oil pump, and an in-line mechanical Zexel VE fuel injection pump, ensuring 100% direct bolt-on installation with flywheel housings and chassis mounts.
Key Attributes & Technical Parameters for 4M40 ME996860 Engine
| Product Category | Diesel Engine Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Mitsubishi 4M40 / 4M40-E1 Diesel Engine | Brand Name | Tatan |
| Compatible Equipment | Caterpillar CAT 307 | 307B | 307C | 307D | OEM Part Number | ME996860 / ME993333 / ME444303 |
| Matched Engine Series | Mitsubishi 4M40 Series (4-Cylinder Diesel) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 40.5 kW – 43.0 kW @ 2100 RPM Rated | Pilot Control Pressure | 2.835 Liters (95mm × 100mm) |
| Spool Precision Spec | Micro-Honed Dry Liners < 0.003 mm Tolerance | Quality Status | 100% Brand New Turnkey Assembly |
| Machinery Test Report | Provided (100% Dyno Bench Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | 15W-40 Heavy-Duty Diesel Engine Oil | Packaging | Export Wooden Box Packaging |
Multi-Machinery Fleet Support & Engine Assembly Inventory
Tatan supplies factory-built turnkey diesel engines, cooling packages, water pumps, and internal overhaul rebuild parts for excavators, wheel loaders, and compact rollers globally:
Supported Excavator Machinery Brands & Global Coverage
In addition to Caterpillar compact excavators, Tatan manufactures and supplies replacement complete diesel engines, short blocks, and overhaul parts across major equipment brands:
Application Scenarios & Buyer Value
When contractors search to compare Caterpillar 307 engine replacement cost and upgrade their machine with our 4M40 ME996860 Engine, they secure measurable field reliability and lower cost per hour:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Caterpillar 307 Engine Repowering | 1:1 direct bolt-on installation eliminates starting delays and restores full 43.0 kW power for continuous 0.33 m³ rock bucket trenching. |
| Compact Machinery Repair Workshops | Avoids the complex labor of block re-boring and injector pump calibration; installs as a pre-timed turnkey unit. |
| Urban Utility & Earthmoving Fleets | Heavy-duty forged pistons and multi-layer steel head gaskets withstand continuous hydraulic breaker hammer operations. |
| Equipment Parts Stockists | High-demand 2.8L 4-cylinder engine inventory packaged in solid export wooden crates ready for immediate global dispatch. |
4M40 ME996860 Engine OEM Diagnostic & Troubleshooting Guide
Use this technical guide to diagnose common Mitsubishi 4M40 diesel engine symptoms on your Caterpillar 307 excavator:
| Engine Fault Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Hard cold starting with heavy white smoke | Mechanical VE distributor injection pump delivery valve wear or faulty glow plug circuit, dropping injection pressure below 18.5 MPa. | Replace with Tatan complete 4M40 ME996860 Engine assembly fitted with brand-new factory-timed Zexel injection pump and pre-tested glow plugs. |
| 2. Coolant boiling & expansion tank bubbling | Combustion gas blown past cylinder head gasket on rear cylinder 4 due to thermal concentration under continuous rock hammer work. | Install Tatan new engine with factory-torqued MLS head gasket and precision surface-milled parent block face. |
| 3. Heavy crankcase blow-by & oil spitting | 95mm cylinder dry liner wall micro-scoring or stuck keystone compression rings allowing combustion pressure into the oil pan. | Install Tatan new 4M40 turnkey engine; flush radiator cooling fins and install fresh dual-element air filters. |
| 4. Oil pressure lamp flickers at hot idle (< 0.12 MPa) | Excessive crankshaft main journal bearing clearance or worn trochoid oil pump rotor losing delivery volume under operating heat. | Replace complete engine assembly to maintain factory oil pressure (> 0.35 MPa rated / > 0.15 MPa idle) and prevent crankshaft seizure. |
Transport Packaging & Certified Quality Assurance
Every Tatan diesel engine undergoes internal anti-corrosion fogging, heat-sealed plastic wrap, and solid timber export crating:
✈️ Express Air Courier
Partnered with DHL, FedEx, and UPS for 3-7 day priority delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL container ocean freight for bulk equipment parts replenishment.
📦 Export Wooden Crates
Solid fumigated timber cases lined with thick shockproof foam to prevent transit damage.
4M40 ME996860 Engine FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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