Sitrak C7H Tractor

Sitrak C7H Tractor - Introduction, Detailed Specifications & Operation Guide

Basic Parameters

• Brand & Model: Sinotruk Sitrak C7H Heavy-Duty Tractor (optional configurations for different transportation scenarios, energy types and regional needs)
• Drive Type: 4×2 / 6×4 (optional), mainly 6×4 drive configuration (6 wheels in total, 2 front steering axles and 2 rear driving axles), suitable for heavy-load long-distance and mountain road transportation
• Wheelbase: 3200mm / 3600mm / 3800mm / 4200mm (optional configurations, adjustable according to traction needs and trailer matching)
• Overall Dimensions (L×W×H): 6800–7800mm × 2550mm × 3900–4100mm (varies with cab type and configuration)
• Curb Weight: 8.9–9.5 tons (lightweight optimized design, adopting high-strength materials to balance weight and load-bearing capacity, meeting national and international standard limits)
• Gross Combination Weight (GCW): 49–60 tons (in line with global heavy-duty vehicle standards, customizable according to export regional requirements, such as Australia's load demand calibration)
• Emission Standard: Euro 4 / Euro 5 / Euro 6 (China National IV / V / VI); the hydrogen internal combustion version achieves zero carbon emissions, adapting to the global "double carbon" strategy
• Tire Specification: 12R22.5 / 295/80R22.5 (6 tires in total), optional low-rolling resistance energy-saving tires and all-weather tires, adapting to different road conditions such as mountain roads and long-distance transportation

Powertrain System

• Engine: Optional Sinotruk MAN MC series (MC11 / MC13) high-efficiency diesel engine; optional Weichai engine for specific markets; hydrogen internal combustion engine version available for green transportation needs
• Displacement: 10.5L (MC11) / 12.4L (MC13) / optional hydrogen internal combustion engine (with mass power density of 605W/kg)
• Max Power: 440–540 HP (324–397 kW) for diesel version; the hydrogen internal combustion engine adopts intelligent thermal management control technology, with a service life of up to 30,000 hours; the 540-horsepower version performs excellently in mountain road transportation, with rapid power response
• Peak Torque: 2100–2500 N·m, with maximum torque speed of 900–1400 rpm (wider economic speed range), ensuring excellent climbing performance and low-speed torque, easily adapting to heavy-load starting and long uphill sections in mountainous areas
• Features: Diesel version adopts inline 6-cylinder, turbocharged & intercooled, direct injection, electronic control high-pressure common rail technology, with strong low-speed torque, fast heat dissipation and excellent fuel economy; the fuel consumption of mountain road transportation is 31–33L per 100 kilometers, which is significantly lower than that of similar models; the B10 service life is as high as 1.5 million kilometers, with a long maintenance cycle, suitable for long-distance high-intensity continuous operation; the hydrogen internal combustion version realizes zero carbon emissions, with high efficiency and durability
• Transmission: The Sitrak C7H Tractor comes standard with a 12-speed AMT automatic transmission and can be equipped with a manual transmission according to user needs; it is perfectly matched with the engine to form an efficient power chain with stable performance and high reliability.

Traction System & Fuel Supply

• Traction Device: Equipped with a high-strength traction saddle (optional 50# / 90#), made of high-quality alloy steel, with strong traction capacity and wear resistance; the traction pin is quenched and tempered, with high hardness and impact resistance, suitable for long-term heavy-load traction work
• Traction Capacity: 170–210 kN, meeting the traction needs of different types of trailers (container trailers, bulk cargo trailers, cold chain trailers, etc.)
• Design: Equipped with a quick-release device, which is convenient for connecting and disconnecting the trailer, improving operation efficiency; the traction saddle is adjustable, adapting to different trailer connection positions, ensuring stable traction and reducing chassis wear during long-distance and mountain road driving
• Fuel Supply System: Diesel version is equipped with a 1000L large-capacity aluminum fuel tank as standard, corrosion-resistant and lightweight, realizing a long endurance of 3000 kilometers, avoiding frequent refueling during long-distance transportation; optional 600L+400L dual fuel tank configuration, meeting the needs of ultra-long-distance transportation without refueling; hydrogen internal combustion version is equipped with a high-pressure hydrogen storage system, ensuring efficient and stable energy supply
• Fuel Filter (Diesel Version): Equipped with a high-efficiency multi-stage fuel filter, which can effectively filter impurities and water in the fuel, protect the engine fuel injection system, and adapt to different fuel quality in various regions
• Additional Configuration: Optional fuel tank heating function for diesel version, suitable for low-temperature areas, preventing fuel from freezing and ensuring normal operation in cold weather; hydrogen internal combustion version adopts high-precision control technology, realizing high-precision control of dynamic and steady-state working conditions

Cabin & Safety Configuration

• Cabin: Integral all-steel collision-proof structure, ECE-R29 collision safety certification, 4-point full hydraulic suspension; overall adoption of cage structure, which significantly improves impact resistance and deformation resistance, and the safety reaches the world-class level; high-top double sleeper cab with flat floor design, improving interior space comfort and accessibility, suitable for long-distance drivers to rest
• Interior: Spacious and comfortable, adopting advanced noise reduction technology, NVH noise reduction as low as 53dB, effectively isolating noise and vibration during driving; equipped with multi-adjustable airbag shock-absorbing driver seat with ventilation and heating functions, 820mm wide sleeper bed, multi-functional LCD instrument panel, 10.25-inch intelligent central control screen, automatic constant temperature air conditioning, high-fidelity audio and multi-layer storage space, creating a "mobile home" for drivers and effectively reducing driving fatigue during long hauls and mountain road driving
• Additional Configuration: Optional electric cab lifting, intelligent terminal, 360 panoramic camera, intelligent fault diagnosis system (real-time monitoring of vehicle status), manual sunroof and parking air conditioning; the central control panel is reasonably arranged, with various function switches within easy reach, improving operation convenience; the hydrogen internal combustion version is equipped with a special safety monitoring system for hydrogen storage, ensuring safe operation
• Safety Configuration: Comprehensive safety protection, focusing on solving the safety problems of mountain road and long-distance driving, in line with European safety standards

 Pre-Operation Inspection
Before starting the vehicle, conduct a comprehensive inspection to eliminate potential safety hazards and ensure normal operation, in line with the safety operation specifications of heavy-duty tractors, especially suitable for mountain road and long-distance transportation:

1. Exterior & Chassis: Check the tire pressure and wear condition of all tires, ensure wheel nuts are fastened (pay special attention to mountain road driving needs); inspect the traction saddle, traction pin and connecting bolts for looseness, deformation or wear; check the drive shaft, axle and chassis bolts for tightness and damage; confirm the ground clearance is normal, and remove obstacles on the driving path to avoid tire or chassis damage during driving; check the integrity of the differential lock and its pipeline, and ensure it can work normally on slippery roads.
2. Fluid Inspection (Diesel Version): Check the levels of engine oil, coolant, fuel and brake fluid to ensure they meet the standard; drain the accumulated water in the fuel filter in time; inspect the oil pipeline and brake pipeline for tightness, and check for oil leakage or air leakage; ensure the oil temperature and water temperature are within the normal range before operation, especially in cold areas; check the hydraulic oil level of the cab suspension system. For the hydrogen internal combustion version, check the tightness of the hydrogen storage system and the normal operation of the safety monitoring system.
3. Cab & Electrical System: The Sitrak C7H Tractor checks the vehicle's lights, horn, windshield wipers, automatic headlights, and automatic windshield wipers to ensure all electrical equipment is functioning properly; check the airbag seat, suspension system and steering system for normal operation; confirm the parking brake is in effective braking state; adjust the rearview mirror and central control screen, and check the 360 panoramic camera and blind spot monitoring function to ensure good driving vision (especially important for mountain road driving); check the traction saddle locking device to ensure it is locked reliably; test the one-button start function if equipped.

 Vehicle Starting & Daily Driving

1. Enter the cab, turn the key to the "ON" position (or press the one-button start switch), wait for the vehicle self-inspection to complete (no fault alarm), then start the engine. For the AMT automatic gearbox version, ensure the gear is in neutral before starting; start the engine in a well-ventilated area to avoid exhaust pollution (the hydrogen internal combustion version needs to check the hydrogen supply system before starting).
2. After starting, let the engine idle for 3–5 minutes to warm up, observe the instrument data (engine speed, oil pressure, water temperature) to ensure all indicators are normal. In low-temperature areas, preheat the engine to 30–40℃ before starting; do not start the engine with full load when the water temperature and oil temperature do not meet the requirements, to avoid damaging the powertrain.
3. Release the parking brake, confirm the gear is in neutral (for automatic gearbox, switch to D gear), step on the accelerator gently to start smoothly, avoiding violent acceleration and harsh gear shifting, especially when pulling a heavy-load trailer to prevent drive shaft or tire slipping; honk the horn before starting to warn surrounding personnel, which is more important in mountain road areas with poor vision.
4. Maintain a stable speed during driving: the maximum speed on highways shall not exceed 90km/h, and the speed on ordinary roads and mountain roads shall be controlled within 60km/h. For long downhill sections, use low gears and engine brake (or hydraulic retarder) to avoid frequent braking, which may cause brake failure; do not change direction or shift gears when the vehicle is moving at high speed, and keep a safe distance from the vehicle in front; use the cruise control function appropriately on flat roads to reduce driving fatigue.
5. When driving on muddy, snowy or slippery roads (common in mountainous areas), turn on the differential lock to improve wheel grip and passability; avoid sharp turns at high speed to prevent rollover. For steep slopes, use low gears to ensure sufficient power and avoid slipping; when climbing, maintain a stable speed and do not shift gears frequently; use the hill-start assist function when starting on slopes to prevent slipping.
6. During long-distance driving, pay attention to the fuel (or hydrogen) level and instrument prompts, and refuel (or replenish hydrogen) in advance when it is low; pay attention to the prompts of the intelligent fault diagnosis system, and deal with abnormal conditions in time; check the trailer connection status regularly during driving to ensure safe traction; for mountain road driving, pay attention to observing road signs and avoid driving in dangerous areas.

 Trailer Connection & Disconnection Operation

1. Trailer Connection: Drive the tractor to the front of the trailer, keep the tractor and trailer in a straight line, and slowly approach the trailer until the traction pin is aligned with the traction saddle; lower the tractor's suspension appropriately to make the traction pin insert into the traction saddle; lock the traction saddle locking device, and check to confirm it is locked reliably; connect the trailer's air circuit and circuit connectors, and test the trailer's lights and brakes to ensure they work normally; check the trailer's tire pressure and connection bolts, and confirm there is no looseness; use the 360 panoramic camera to check the surrounding environment to avoid blind spots, especially in narrow areas.
2. Trailer Disconnection: Drive the tractor and trailer to a flat, solid and open area, shift to neutral gear, and firmly pull the parking brake of the tractor and trailer; disconnect the trailer's air circuit and circuit connectors, and place the connectors in a clean and dry place to avoid pollution; lift the tractor's suspension to separate the traction saddle from the trailer's traction pin; slowly drive the tractor forward to separate it from the trailer, and park the tractor and trailer in a safe area respectively; place wheel blocks under the trailer's wheels to prevent slipping, which is more important on slopes.

 Post-Operation Maintenance

1. Clean the dust on the cab, chassis and traction saddle to prevent dust accumulation from affecting the service life of the vehicle; clean the air filter regularly to ensure engine intake smoothness, especially in dusty mountain road areas; clean the 360 panoramic camera lens and sensor to ensure clear vision and normal function; clean the residual dirt on the trailer connection part.
2. Check the levels of all oils and liquids again (diesel version), replenish fuel, engine oil, coolant and brake fluid in time; check for oil leakage, air leakage and loose bolts (focus on chassis, powertrain and traction system), and tighten or repair them immediately if any problems are found; when inflating the tires, do not stand in front of the tires to avoid injury from explosion; check the wear condition of the brake pads and tires (mountain road driving requires more frequent inspection). For the hydrogen internal combustion version, check the hydrogen storage system and safety monitoring system, and conduct regular maintenance according to the manual.
3. Park the vehicle in a dry, ventilated and flat area, turn off the engine, pull the parking brake tightly, and put the gear in neutral. If the vehicle is parked for a long time, cover the cab and traction saddle to avoid dust and corrosion; turn off the main power switch and close the doors and windows; disconnect the power supply of the trailer if it is not connected; retract the cab suspension to the appropriate position; the hydrogen internal combustion version needs to cut off the hydrogen supply before parking.
4. Carry out regular maintenance according to the vehicle manual: replace engine oil, filter elements (air filter, oil filter, fuel filter) and gear oil regularly; check the wear condition of tires, brake pads and transmission parts, and conduct comprehensive inspection and maintenance of the powertrain, traction system and brake system to ensure the long-term stable and efficient operation of the vehicle; the hydrogen internal combustion version needs to maintain the hydrogen storage system and related components regularly; when maintaining the vehicle, support the lifted parts firmly to avoid accidents.