4750 Gal Fire Truck
The 4750 Gal Fire Truck is a high-capacity 8×4 firefighting vehicle for urban, industrial, and extended firefighting operations. It is built for fire departments and industrial safety teams that need large water capacity, long-range discharge, and stable operation at major fire scenes.
The truck carries an 18,000 L (4,755 US gal) water tank. It is equipped with a PS50 long-range fire monitor. Under controlled test conditions, the monitor can reach 60–100 m (197–328 ft) at 1 MPa. This supports long-range water delivery and wide coverage at large fire scenes.
Built on a Mercedes-Benz 8×4 heavy-duty chassis and powered by a 426 kW diesel engine, the vehicle is designed with reference to recognized fire apparatus configuration and performance principles, including legacy NFPA 1901 / NFPA 1900 guidance. Its large water tank, long-range monitor, extended operating time, and OEM customization make it suitable for fire departments, industrial safety fleets, and emergency service contractors.
- Water Tank: 18,000 L / 4,755 US gal
- Chassis: Mercedes-Benz 8×4
- Engine Power: 426 kW
- Fire Monitor: PS50 long-range fire monitor
- Monitor Range: 60–100 m / 197–328 ft at 1 MPa
- Applications: Urban firefighting, industrial fire protection, large facilities, and extended emergency response
Detailed Description
The Poseidon 4750 Gal Fire Truck is an 8×4 water tank fire truck for urban, industrial, and long-duration firefighting. It combines large water capacity, long-range discharge, and operator-friendly controls.
Water Tank and Fire Monitor
The truck carries an 18,000 L (4,755 US gal) water tank. The PS50 fire monitor supports water and foam discharge with a rated flow of 60–80 L/s (950–1,270 gpm) at 1 MPa.
The monitor supports straight-stream and fog modes. Firefighters can switch between long-range attack and wider area coverage while reducing direct exposure to heat, smoke, and debris.
For Class B fire risks, the truck can be equipped with an optional foam system. Available options include around-the-pump or balanced-pressure foam proportioning systems, depending on project requirements.
Pump and Plumbing System
Water delivery is powered by a midship or PTO-driven fire pump. The pump and plumbing system are designed with reference to recognized fire apparatus principles, including NFPA 1900 and legacy NFPA 1901 guidance.
The system can include pressure governors, relief valves, and stainless-steel manifolds. These components help control pressure, protect the system, and improve corrosion resistance in wet, coastal, or foam-system environments.
The plumbing layout can include dual 65/75 mm discharges, 4–6 inch LDH intakes, and quick-connect couplings. This allows connection with municipal hydrants, industrial water supplies, portable pumps, and other fireground equipment.
Body, Tank, and Corrosion Protection
The body is built from high-strength carbon steel. It is protected with an epoxy-polyurethane coating system for outdoor service and long-term use.
For coastal areas, chemical plants, or other corrosive environments, optional 304 or 316 stainless-steel water tanks are available. Optional coating validation against ISO 9227 salt-spray test methods can be provided when required by the project.
The tank supports and chassis mounts are reinforced to help manage vibration and load stress during full-load operation on paved roads, industrial roads, and controlled access routes.
Chassis and Driving Performance
The truck is built on a Mercedes-Benz 8×4 heavy-duty chassis. It is powered by a 15.6 L, 426 kW (571 hp) diesel engine for heavy-load driving and pumping operations.
The drivetrain is configured for stable traction and load distribution. The 315/80R22.5 tires support paved road use, industrial sites, and controlled rough-surface access.
The wheelbase is 1,750 + 4,600 + 1,350 mm. This supports load distribution for the 37,400 kg (82,453 lb) gross vehicle weight. A dual-circuit air-brake system with ABS and ASR improves braking safety on wet roads, slopes, and heavy-load routes. An optional hydraulic retarder can be added for better downhill control.
Cabin and Control System
The cabin accommodates 2 operators and 4 crew members. It includes ergonomic seating, air conditioning, a wide windshield, and adjustable mirrors for better visibility.
The central control console places pump, lighting, and fire monitor controls within easy reach. This helps reduce operator workload during long incidents.
The 24 V dual-circuit electrical system supports warning lights, scene lights, and emergency equipment. CAN-bus diagnostics can monitor engine, pump, and electrical system status, making inspection and maintenance easier.
Safety and Visibility
The truck can be equipped with anti-slip walkways, emergency stop controls, reflective markings, warning beacons, and scene lighting. Reflective markings can be configured with reference to ECE R104 requirements for retro-reflective markings on heavy vehicles.
These features improve safety during night operations, roadside incidents, industrial emergencies, and high-traffic response scenes.
Key Features
- 18,000 L (4,755 US gal) water tank for long-duration firefighting
- PS50 fire monitor with 60–100 m (197–328 ft) range at 1 MPa
- 60–80 L/s (950–1,270 gpm) monitor flow for water or foam discharge
- 15.6 L, 426 kW diesel engine for heavy-load driving and pumping
- Mercedes-Benz 8×4 chassis with ABS/ASR braking support
- Midship or PTO-driven pump system designed with reference to NFPA 1900 and legacy NFPA 1901 principles
- Carbon-steel body with optional stainless-steel tank for corrosive environments
- ISO 9227 coating validation available for project-specific corrosion requirements
- Six-seat cabin with air conditioning, centralized controls, and CAN-bus diagnostics
- Optional foam system for Class B industrial fire risks
Core Applications
- The 4750 Gal Fire Truck is designed for municipal, industrial, large-facility, and controlled remote-site firefighting. It is suitable for operations that require large water capacity, long-range discharge, and extended fireground water supply.
- Municipal Fire Departments: Supports water supply, exterior attack, and sustained operations for dense-area fires, large-building incidents, and major emergency scenes.
- Industrial Facilities: Suitable for plants, refineries, storage depots, ports, and energy sites that require high-capacity water delivery and optional foam support.
- Class A/B Fire Risks: Supports Class A water delivery and foam-assisted Class B fire control when equipped with a compatible foam system.
- Remote Industrial Sites: Supports heavy-load travel on paved roads, industrial roads, mining roads, oilfield access roads, and controlled site routes.
- Emergency Fleets: Can serve as a tanker, water supply unit, or large-capacity support apparatus for extended firefighting operations.
Technical Parameters
| Parameter | Specification |
| Water Tank Capacity | 18,000 L (4750 gal) |
| Dimensions (L×W×H) | 11,700 × 2,520 × 3,680 mm (460.6 × 99.2 × 144.9 in) |
| GVW | 37,400 kg (82,453 lbs) |
| Payload Capacity | 17,750 kg (39,155 lbs) |
| Engine Power | 426 kW (571 hp) |
| Engine Displacement | 15,569 ml (15.6 L) |
| Fire Monitor Model | PS50 |
| Monitor Range (tested at 1 MPa) | 60–100 m (197–328 ft) |
| Pump Type | Midship / PTO-driven, NFPA 1901-aligned |
| Flow Rate (approx.) | 60–80 L/s (950–1,270 gpm) |
| Chassis | Mercedes-Benz 8×4 |
| Brake System | Dual-circuit air brake with ABS/ASR |
| Wheelbase Set | 1,750 + 4,600 + 1,350 mm |
| Tire Size | 315/80R22.5 |
| Crew Capacity | 2 operators + 4 crew |
| Electrical System | 24 V dual circuit, ≥150 A alternator |
| Tank Material | Carbon steel / optional 304/316 stainless |
| Compliance | NFPA 1901 (design reference), NFPA 20 (pump), ISO 9227 corrosion resistance |
Standards and Certification Options
- NFPA Reference Design: Designed with reference to NFPA 1900 and legacy NFPA 1901 fire apparatus principles.
- Pump System: Midship or PTO-driven pump system for fire apparatus water delivery and pressure control.
- Corrosion Testing: ISO 9227 salt-spray coating validation available upon request.
- Listed Components: Third-party listed component options available depending on configuration.
- Reflective Markings: ECE R104 reference configuration for heavy-vehicle retro-reflective markings.
