LD4BT3.9 Series Fire Pump Diesel Engine
30-130 HP Fire Fighting Pump Drive
LD4BT3.9 Series Fire Pump Diesel Engine
Product Overview
The LD4BT3.9 series fire fighting pump diesel engines are 4-cylinder 3.9 L engines rated at 3000 r/min, covering 30-130 HP (22-96 kW) with a fitting pump set power of 20-110 HP. Engine assemblies are built with standard China Cummins parts, delivering high quality and stable power with excellent parts availability for fire pump duty.
Key Features
- 4-cylinder engines designed at 3000 r/min, covering 30-130 HP, fitting pump set power 20-110 HP
- Engine assembly with standard China Cummins parts, high quality and stable power
- Rated power tested by factory per China standard method (without radiator)
- Naturally aspirated, turbocharged and turbocharged-intercooled models across the range
Technical Specifications
| Model | Rated Power/Speed (kW/r/min) | Intake | Cylinders-Bore×Stroke (mm) | Displacement (L) | Min Fuel Consumption (g/kW·h) | Oil Capacity (L) |
|---|---|---|---|---|---|---|
| LD4B3.9-30G | 22/3000 | Natural | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4B3.9-45G | 33/3000 | Natural | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4B3.9-60G | 44/3000 | Natural | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4BT3.9-75G | 55/3000 | Turbocharged | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4BT3.9-85G | 63/3000 | Turbocharged | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4BT3.9-105G | 78/3000 | Turbocharged | 4-102×120 | 3.9 | ≤200 | 10-12 |
| LD4BTAA3.9-130G | 96/3000 | Turbocharged & Intercooled | 4-102×120 | 3.9 | ≤200 | 10-12 |
Series common specifications: direct injection, vertical, inline, 4-stroke; water cooled; electric starting, 24V; noise limit ≤98 dB(A); meets the 4-hour continuous operation standard for fire fighting duty.
Performance Curve
Performance curve shown for LD4BT3.9-85G, a representative model of this series.
| Engine Speed (r/min) | Power (kW) |
|---|---|
| 3000 | 63 |
| 2700 | 60 |
| 2500 | 58 |
| 2300 | 55 |
| 2100 | 52 |
| 1900 | 49 |
| 1700 | 45 |
| 1500 | 38 |
| 1300 | 32 |
Applications
- Fire pump set drive
- Fire truck pump drive
- Fixed fire protection systems
- Industrial and municipal fire protection