# 504 Tractor: The All-Powerful Partner for Medium-Sized Farms

I. Overview of the 504 Tractor The 504 tractor is a classic medium-sized wheeled tractor, belonging to the main model category in the 50-horsepower class. As a representative product of China's self-owned brands, the 504 tractor has become one of the preferred models for medium-sized farms, planting cooperatives, and agricultural machinery service organizations across the country, thanks to its reliable performance, reasonable price, and wide adaptability. This tractor model strikes an excellent balance between power performance and economy, meeting a variety of agricultural production needs. II. Main Technical Parameters of the 504 Tractor ■ Engine Configuration - Model: LR4A3L-23 - Type: In-line, water-cooled, four-stroke diesel engine - Rated Power: 50 hp (36.8 kW) - Rated Speed: 2300 r/min - Number of Cylinders: 4 cylinders ■ Transmission System - Gearbox: 4×3 mechanical gearbox (12 forward gears + 4 reverse gears) - Clutch: Dual-action dry friction clutch - Braking System: Mechanical brakes ■ Hydraulic System - Hydraulic Output Flow: 26 L/min - Maximum Lifting Force: ≥10 kN ■ Power Take-Off (PTO) - Speed: 540/720 r/min (optional) - Standard 8-spline shaft ■ Travel System - Front Wheels: 7.50-16 - Rear Wheels: 12.4-28 - Drive Mode: 4×2 rear-wheel drive (4×4 optional) ■ Dimensions - Length × Width × Height: 3680 × 1880 × 2450 mm - Wheelbase: 1950 mm - Minimum Ground Clearance: 380 mm ■ Operating Weight - Basic Model: Approx. 2100 kg III. Performance Features of the 504 Tractor 1. Superior Power Performance - Equipped with a four-cylinder diesel engine, delivering high low-end torque and ample power reserve - Low fuel consumption rate with good economy (rated condition fuel consumption rate ≤245 g/kW·h) - Engine features a forced circulation water-cooling system with excellent heat dissipation 2. Strong Operational Adaptability - 12+4 gear configuration with a wide speed range (forward 1.89–30.5 km/h) - Three-point hitch system conforms to national standards and is compatible with a variety of implements - Hydraulic system provides high lifting force, capable of handling heavy-duty operations such as deep plowing 3. Comfortable and Convenient Operation - Flat floor design provides a spacious operator area - Adjustable steering wheel and comfortable seat - Well-laid-out controls for light and easy operation 4. Easy Maintenance - Engine features a mature design with high parts interchangeability - Reasonably positioned maintenance points on key components for easy routine servicing - Extensive nationwide service network with ample parts supply IV. Typical Application Scenarios of the 504 Tractor 1. Field Crop Cultivation - Deep plowing with mounted plows (recommended: 1L-430 four-bottom plow) - Rotary tillage and soil preparation (with 1GQN-180 rotary tiller) - Seeding operations (with 2BXF-12 fertilizer drill) - Intertilling and weeding (with 3ZF-4.2 cultivator) 2. Cash Crop Management - Intertill management in orchards and tea plantations - Tillage operations in vegetable greenhouses (requires optional narrow-track configuration) - Supporting planting and harvesting of crops such as sugarcane and potatoes 3. Rural Transport Operations - Hauling 5–7 ton agricultural trailers for produce transport - Material transport in rural infrastructure construction 4. Stationary Operations - Driving stationary agricultural machinery such as threshers and crushers - Serving as a power source for water pumps, generators, and other equipment V. Purchasing Recommendations for the 504 Tractor ■ Select Configuration Based on Operational Needs - For paddy field operations, choose the 4WD model with high-lug tires - For mountainous areas, consider installing a roll-over protective structure (ROPS) - For transport-dominated use, an air brake system may be added ■ Principles for Selecting Matching Implements - Plowing: Use a 4-bottom plow (sandy loam) or 3-bottom plow (heavy clay soil) - Rotary tillage: Use a 1.8-meter rotary tiller - Seeding: Use a 12-row seeder ■ Purchasing Precautions - Inspect the operation of key components such as the engine and gearbox - Verify that tool kits, manuals, and other accessories are complete - Check the distribution of local after-sales service outlets VI. Key Maintenance Points for the 504 Tractor ■ Daily Maintenance - Check engine oil, coolant, and hydraulic fluid levels daily - Clean the air filter (every 50 hours) - Inspect tire pressure and fastener condition ■ Periodic Maintenance - Engine oil change (every 250 hours) - Oil filter replacement (every 500 hours) - Transmission oil change (every 1000 hours) - Hydraulic system filter cleaning (every 500 hours) ■ Seasonal Maintenance - Use appropriate grades of diesel and engine oil in winter - Drain coolant and store the battery separately during long-term parking VII. Market Advantages of the 504 Tractor - High cost-performance ratio: Clear price advantage over imported brands of the same class - Strong adaptability: Optimized design for Chinese farmland conditions - Extensive service network: Service outlets covering virtually all county-level regions nationwide - Good value retention: Strong liquidity in the second-hand market with low depreciation rates VIII. User Feedback Based on user surveys across multiple regions, the main advantages of the 504 tractor include: - Ample engine power with economical fuel consumption - Low failure rate and low maintenance costs - Simple operation, easy for beginners to master - Convenient implement compatibility and wide adaptability Common suggestions for improvement: - Cab comfort could be further enhanced - Steering effort on some models is somewhat heavy - Electrical system stability requires improvement IX. Conclusion As a classic model in China's medium-sized tractor market, the 504 tractor has earned the trust of a broad user base with its reliable performance, economical operating costs, and wide applicability. It is particularly well suited for family farms and specialized planting cooperatives operating on 50–200 mu of land. As China's agricultural mechanization level continues to rise, the 504 tractor will keep playing an important role in the agricultural modernization process, making it a mainstay agricultural machine worth considering for medium-sized farms.