EQ6661ST6D1 | Dongfeng School Bus
The EQ6661ST6D1, produced by Dongfeng Special Vehicle Co., Ltd., is a 6.6-meter-long medium-sized special-purpose school bus with a body length of approximately 6590 mm. It is primarily designed for the safe travel of primary school students and young children. Its rated passenger capacity is 24-32 people (the actual passenger capacity depends on the seating layout). The vehicle is equipped with a diesel engine meeting China VI emission standards (power range 120-170 hp), with a maximum speed limit of 80 km/h to enhance driving safety. As one of the main models in the Dongfeng Chaolong school bus series, its modular design (such as customizable side windows and doors) and passive safety technologies continue the reliability advantage of the Dongfeng Chaolong brand in the small and medium-sized school bus market.
As part of EMAC, DuraMac provides complete powertrain that integrated with DCEC engine, Fast-Eaton clutch, FAST-CAT transmission, Dongfeng-DANA axle and Komman air suspension, while the electrification of automobile is the certain future, Duramac also get involved with EV powertrain system.
We provide full life cycle services for all customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.
Advantages of EQ6661ST6D1 school bus
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The vehicle appearance is designed to highlight the characteristics of the Chaolong brand, and the product is highly recognizable.
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The narrow body design and reasonable layout of the passenger area can accommodate 19 children; the horizontal care seat is convenient for observing the situation in the car at any time.
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The vehicle has a light weight, good design power and fuel economy.
Technical Specifications
| Total Length (mm): | 6590 |
| Total Width (mm): | 2400 |
| Total Height (mm): | 2890 /3020 |
| Interior Height of Compartment (mm): | 1880 |
| Wheelbase (mm): | 3650 |
| Front Suspension / Rear Suspension (mm): | 970/1970 |
| Approach/Departure Angle (°): | 17/11 |
| Height of First Step (mm): | 340 |
| Rated Total Mass (kg): | 6500 |
| Maximum Number of Occupants (persons): | 24 – 32 |
| Maximum Speed (km/h): | 80 |
| Track Width: | 1810/1670 |
DuraMac
DCEC ISL8.9 series automotive engine is four-strokes engine with 102 mm bore and 120 mm stroke, Equipped with Bosch (or BYC or Weifu) pump. engine comes with turbocharger and Air- Air intercooler. The prime power range is from 269 HP to 394 HP.
Fast Gear
The F6A Series Automated Transmission uses the FAST automatic transmission, has six front gears, the transmission ratio step arrangement is reasonable, has very outstanding fuel economy. Adopt hydraulic automatic transmission. The F6A Series Automated Transmission has six gears, each with a different reduction ratio.
EV Truck
Electric wheel dump trucks use electricity as a power source, completely abandoning traditional fuel engines. This change enables the vehicle to achieve true “zero emissions” during operation, without the emission of pollutants such as carbon monoxide, nitrogen oxides, and particulate matter in the exhaust gas, greatly reducing the pollution to the atmospheric environment.
DANA Axle
Applying the advanced technology of DANA with high efficiency, fuel economy, strong load torque, low noise,high reliability, lower procurement cost, low repair cost and lower maintenance cost.
Datong Gear
The Datong HW25712XSJ Heavy Manual No-Sync Gearbox has a torque of 2500 N.m, a gear ratio range of 14.941-1, an oil capacity of 13 L (13.5 L when equipped with a power take-off), an overall length of 993 mm, and a weight of 428 kg.
Crane Trucks
The DFZ5258JSQSZ6D truck crane is a powerful and versatile vehicle designed for efficient lifting and transportation tasks. Equipped with a YCS06300-61 engine and a Shaanxi Auto Fast gear : 10JS120TA high-low gear with synchronizer、PTO gearbox, it provides strong and stable power for demanding operations.
Crane Trucks
The DFZ5258JSQSZ6D truck crane is a powerful and versatile vehicle designed for efficient lifting and transportation tasks. Equipped with a YCS06300-61 engine and a Shaanxi Auto Fast gear : 10JS120TA high-low gear with synchronizer、PTO gearbox, it provides strong and stable power for demanding operations.
Crane Trucks
The DFZ5258JSQSZ6D truck crane is a powerful and versatile vehicle designed for efficient lifting and transportation tasks. Equipped with a YCS06300-61 engine and a Shaanxi Auto Fast gear : 10JS120TA high-low gear with synchronizer、PTO gearbox, it provides strong and stable power for demanding operations.
Transmission Model |
Total Length(mm) |
Overall Width(mm) |
Total Height(mm) |
Maximum Speed (km/h) |
Maximum Total Mass(kg) |
| EQ6100ST6D | 10250 | 2500 | 3240/3165/3110 | 80 | 11000 |
| EQ6110ST6D | 11195 | 2500 | 3240/3200/3165/3110 | 80 | 12000 |
| EQ6580ST6D | 5840 | 1920 | 2670,2700 | 80 | 5550 |
| EQ6661ST6D | 6590 | 2400 | 2890,3020 | 80 | 6500 |
| EQ6750ST6D | 7535 | 2400 | 2900/3050 | 80 | 7250 |
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Basic information of Dongfeng EQ6661ST6D motor |
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| Motor Model | YCY24140-60 | Engine Manufacturer | Yuchai |
| Location/Fuel Type | Front-mounted/Diesel | Motor type | Four-cylinder, in-line, water-cooled, turbocharged and intercooled engine |
| Power(kW/r/min) | 103/2950 | Maximum Torque(N.m/r/min) | 400 |
| Displacement (ml) | 2360 | Bore × Stroke (mm) | 85×104 |
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Chassis Parameters And Configuration |
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| Item | Standard Configuration | Optional configuration |
| Chassis Model | EQ6620KS6T, Dongfeng Special Vehicle Co., Ltd. | — — |
| Transmission | Fast 5 – speed gearbox | — — |
| Clutch | Diaphragm spring, clutch booster | — — |
| Front Axle | Hubei Axle (2.3T), disc brake | — — |
| Rear Axle | Hubei Axle (4.2T) | — — |
| Suspension | Front 9, rear 11 | — — |
| Steering | Power steering | — — |
| Braking | Pneumatic brake, dryer, ABS, self – adjusting arm, exhaust brake, wear alarm | — — |
| Fuel Tank | 90L | — — |
| Tire | 215/75R17.5, run – flat emergency device, tire pressure monitoring | 205/75R17.5 |
| Battery Generator | 6 – QW – 105MF×2, 28V/70A | 6 – QW – 120MF×2, 28V/100A |
| others | Copper water tank, cooler, urea heater, engine preheating device | Cooler, oil circuit heating, centralized lubrication |
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Main body Assembly |
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| Item | Standard Configuration | Optional configuration |
| Body structure | Semi – integral structure | — — |
| Interior | Air – conditioned interior | — — |
| Doors and Door Pumps | Pneumatic outward-swing door with anti-pinch device (remote control lock)(Stamped assembly), rear safety door | — — |
| Side Windows | Full-vehicle lower-bonded upper-sliding side windows, with emergency exits featuring built-in sliding window structures (window-in-window), color: F-green | Integral up-down sliding windows, lower-bonded upper-sliding rear window, color: F-green, with emergency exits featuring built-in sliding window structures |
| Windshield | Front windshield laminated, rear windshield tempered | — — |
| Rearview System | Manual side mirrors, stainless steel lower view mirror, inner mirror | — — |
| Air – conditioning System | Roof-mounted air conditioner | — — |
| Heating System | — — | Oil-fired independent water heating YJ-Q16.3 (standard on the left, 2 forced radiators) Simple water heating (without heater, with 2 forced radiators) |
| Defroster | Defrosting gear, 130W | Defrosting gear, 170W |
| Audio-visual System and Monitoring System | MP3 player with fixed jack, USB charging port | MP5 system, 15″/17″ display |
| Lamp | Front combination lamp with adjustable lighting, rear round lamp combination, 4 – lamp school bus marking lights | — — |
| Satellite Positioning System and Monitoring System | Beidou satellite positioning driving recorder with storage and upload functions (dual 32G SD cards), 5 probes + 7-inch LCD monitor (1. Driver monitoring, 2. Front door boarding monitoring, 3. Passenger area monitoring from front to rear, 4. Front road surface monitoring, 5. Reversing monitoring) | With external printing function, multi-channel video recording system (32G SD card + 5 probes + 7-inch LCD monitor) |
| Safety Monitoring System | Safety patrol alarm and safety patrol switch | — — |
| Wiper | Unidirectional electric wiper | — — |
| Emergency Door | Battery compartment door, Electrical components compartment door | Left-side luggage compartment door |
| Skylight | Type 890A skylight | Type 890B ventilation skylight |
| Seats | Primary school student seating: 3+2 configuration, 2 attendant seats, shock-absorbing and adjustable seat (rear safety door, meets regulations for 31 seats), adjustable seat belt alarm. | — — |
| Paint | Domestic solid color paint (V08 national standard yellow) | Metal paint |
| Others | Speed limiter (limited to 80 km/h); blue printed floor leather, flat floor, electric parking sign, electronic clock with temperature display, semi-width roller-type sunshade curtain, driver’s fan, 2 fire extinguishers (4kg), 2 safety hammers, air horn, upper handrail, school bus guardrail, first-aid kit bracket, first-aid kit, mechanical power-off switch, automatic/manual integrated fire extinguisher (1.2kg) for engine compartment, retractable seat belts throughout the vehicle, foot pad under clutch pedal, aluminum plate at driver’s footrest, OBD socket, heavy-duty vehicle remote emission terminal T-BOX | Quartz sand floor leather, folding side curtain (standard for air-conditioned vehicles), full-width roller-type sunshade curtain, automatic/manual integrated fire extinguisher (0.3kg) for fuel heating compartment (label when optional fuel-powered independent water heating is selected), front and rear route signs, 360° panoramic surround view system, ETC on-board device |
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Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.
Engine Sale Manual
Installation Drawing
Installation Manual
Operation Manual
Parts Catalogue
Report & Certifcate
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EQ6580ST6D1 | Dongfeng School Bus
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EQ6661ST6D | Dongfeng School Bus
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EQ6661ST6D1 | Dongfeng School Bus
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EQ6750ST6D | Dongfeng School Bus
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EQ6750ST6D1 | Dongfeng School Bus
