Comprehensive Maintenance Guide for Changjian Loader Summer Cooling System

Comprehensive Maintenance Guide for Changjian Loader Summer Cooling System I. High-Temperature Warning Indicator Monitoring System 1. Core Temperature Threshold Monitoring - Water temperature gauge warning range: 85-95°C (red zone). - Hydraulic oil temperature critical value: ≤85°C (efficiency drops by 15% when exceeded). - Turbocharger housing temperature: ≤120°C (detected with infrared thermometer). 2. Intelligent Warning System Settings - Install temperature sensors (three-channel monitoring for engine/hydraulic/transmission). - Cab audible and visual alarm linkage (automatic alert when temperature exceeds limits). - Mobile phone remote monitoring (4G module for real-time data transmission). II. In-Depth Maintenance Process for Cooling System 1. Water Cooling System Maintenance (every 250h) - Radiator dust removal: use 0.3MPa compressed air for reverse blowing. - Antifreeze replacement: ethylene glycol type (freezing point -35°C/boiling point 129°C). - Pipeline pressure test: hold at 1.5 times working pressure for 5 minutes. 2. Hydraulic Oil Cooler Maintenance - Fin gap cleaning (dedicated comb-tooth tool). - Air guide shroud sealing inspection (air leakage rate <5%). - Install insect screen (20-mesh stainless steel mesh). 3. Special Maintenance for Air Conditioning System - Condenser cleaning (neutral cleaner pH6-8). - Refrigerant pressure detection (high pressure 1.5-1.8MPa/low pressure 0.2-0.25MPa). - Compressor belt tension adjustment (deflection 10-15mm). III. High-Temperature Working Condition Adaptive Modification 1. Active Cooling Solutions - Install electric fan (power ≥300W). - Oil cooler upgrade (heat exchange area increased by 30%). - Thermal insulation wrapping (ceramic fiber material for turbocharger section). 2. Passive Protection Measures - Reflective film application (engine hood surface). - Sunshade extension (cab roof extended by 60cm). - Ventilated seat modification (with 4 cooling fans). IV. Typical Fault Emergency Handling Fault Phenomenon Temporary Treatment Solution Fundamental Solution Water temperature too high Turn on heater to assist heat dissipation Clean radiator/check thermostat Poor air conditioning cooling Flush condenser fins Replenish R134a refrigerant Hydraulic system overheating Pause operation and run at idle Replace 32# anti-wear hydraulic oil Tire overheating Reduce driving speed Adjust tire pressure to 80% of standard value V. Operating Procedure Optimization 1. Time Period Management - Avoid continuous operation from 11:00-15:00 (implement "work early, rest at noon" system). - In high-temperature warning weather (35°C+), shorten single operation to 2 hours. 2. Load Control - Reduce rated load by 10-15%. - Adjust lifting speed to 80% of standard gear. 3. Shutdown Management - Run at idle for 3 minutes before shutting off (turbocharger cooling). - Park with front facing the wind direction. - Cover exhaust pipe (prevent rainwater backflow). VI. Maintenance Cycle and Record Table Item Daily Check Weekly Maintenance Monthly Maintenance Coolant level √ - - Radiator cleaning - √ - Belt condition √ - √ Air conditioning refrigerant - - √ Hydraulic oil temperature √ √ - Appendix: Changjian Original Cooling System Parts Codes - Water pump assembly: CJ-WP2035. - Silicone oil fan: CJ-FAN4820. - Radiator assembly: CJ-RAD3050. VII. Economic Benefit Analysis 1. Preventive Maintenance Benefits - Failure rate reduced by 60%. - Cooling system lifespan extended by 2 years. - Fuel efficiency improved by 8-12%. 2. Cost Comparison - Daily maintenance cost: approximately 200 yuan/month. - Overhaul cost: ≥15,000 yuan/time. Case Data: After a certain quarry implemented this plan: - Engine overhaul interval extended from 4000h to 6000h. - Summer downtime rate reduced from 18% to 5%. - Annual maintenance cost savings of 23,000 yuan per unit. It is recommended to establish a "High-Temperature Season Special Care File" to record daily key temperature data and maintenance measures, providing data support for equipment health management. When temperature warnings occur for 3 consecutive days, in-depth system maintenance should be carried out immediately.