Hero City Machinery & Electric Co., Ltd
4B3.9-G1/2 Diesel Engine
Engine Technical Datasheet
In-line, 4 Cylinder, 4 Cycle, Natural Aspirate Diesel Engine
Bore×Stroke 102mm×120mm Displacement 3.9 Liters
Compression Ratio 16.5！1
Rated Speed 1500 (1800) rpm Prime Power 24kW/ 27KW Standby Power 26kW/ 30KW Fuel Injection Pump AD Injection Pump Governor GAC Electrical Governor
Or RSV Mechanical Governor Steady Speed Droop ?1%？Electrical Governor，
?5%？Mechanical Governor， Lubricant Capacity 11 Liters
Coolant Capacity 7.2 Liters？Engine Only， Net Weight 300kg
Gross Weight 320kg
Overall Dimension(L×W×H) 765mm×582mm×780mm Coolant Intake Size Φ58mm
Coolant Outlet Size Φ45mm
Flywheel/Flywheel Housing SAE3#/SAE3# Cooling Way Forced Water Cooling Cycle
All data is based on:
Standard Air Intake Temperature 25?
Air Intake Pressure 100kPa
Standard Light Diesel 0# or –10# Light Diesel Fuel Intake Temperature 40?
Air Intake Restriction 251mmHg
Exhaust Back Pressure 76mmHg
Lubricant Oil 15W40-CF4 Upgrade
Single Poly Vee belt drive for fan, alternator and water pump, with self-tensioning idler for minimum maintenance.
Complete Rebuild ability
Cylinder block has multiple rebore capability. Service cylinder sleeves and valve guides are also available.
Cast Iron Skirted Block
With five main bearings for maximum strength and rigidity, low weight and optimum crankshaft support.
Direct Injection Fuel System
For thorough mixing of air and fuel to ensure low fuel consumption; AD injection pump features advance mechanism for reliable cold starting.
Fleetguard spin-on fuel filter and full-flow lubricating oil filter.
Forged Steel, I-Beam Section Connecting Rod
With angle split cap-to-rod interface and capscrew attachment for maximum structural strength and ease of service.
Cold Start Capability
Minimum Ambient Temperature for Unaided Cold Start -12?
Minimum Ambient Temperature for Aided (with Coolant Heater) Cold Start -35?
Low Fuel consumption
Excellent fuel consumption with B.S.F.C 215g/kw.h.
Easy of installation and ready access for routine maintenance.