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The main contents of the no-load test for the wet spray carriage.
Release time:
2026-02-13
Source:
Author:
Summary:
No-load testing is an important step before putting the wet spray carriage into operation or during regular maintenance. By conducting systematic no-load operation checks, potential equipment hazards can be identified promptly, ensuring that all systems are in good working condition. A standardized testing procedure can effectively prevent failures and guarantee construction safety and efficiency.
I. Powertrain Testing
Engine/Motor Operation Test
After starting the powertrain, pay close attention to the following checks: Observe whether the start-up is smooth and whether the idle operation is stable; inspect the operating conditions at different speeds to ensure there is no abnormal vibration; listen carefully to the running sound and eliminate any unusual noises; check the exhaust color to determine whether combustion is complete; and verify the responsiveness of the emergency stop device.
Power Output Verification
Verify power output stability through no-load testing: Check the ability of the unit to maintain speed under varying load demands; confirm whether the power output meets the rated specifications; verify that fuel/electricity consumption remains within the normal range; and ensure the cooling system is functioning effectively.
II. Hydraulic System Testing
System stress testing
The hydraulic system is a key focus of the testing: verify the system pressure build-up under no-load conditions; confirm that the set values of each relief valve comply with the standards; check the pressure stability, ensuring that the fluctuation range is kept within ±0.5 MPa; and test whether the unloading pressure falls within the permissible range.
Actuator Action Check
Perform functional tests on each hydraulic actuator: Operate all hydraulic cylinders through their full stroke, performing reciprocating motions; check the forward and reverse rotation status of the hydraulic motors; verify smoothness of operation and eliminate any creeping phenomena; and test the effectiveness of limit-position cushioning.
III. Pumping System Inspection
S-Valve Function Test
Focus on inspecting the operating status of the distribution valve: test the accuracy and responsiveness of the oscillating motion; check the effectiveness of the directional change cushioning to prevent impact; verify that the swing cylinder’s operating speed meets the specified requirements; and detect whether there are any leaks at the sealing areas.
Conveyor mechanism inspection
Conduct a comprehensive inspection of the pumping mechanism: check the fit between the delivery cylinder and the piston; verify the synchronization accuracy of the main oil cylinder; test the lubrication system’s oil supply condition; and confirm that there is no abnormal wear in any component.
IV. Verification of the Electrical Control System
Operation Interface Testing
Perform functional verification of the control system: Check the sensitivity of all control buttons and switches; verify the accuracy of parameter display on the screen; test the reliability of the emergency stop device; and confirm that the alarm system is functioning properly.
Sensor detection
Verify each monitoring sensor: Validate the accuracy of pressure sensor readings; check the reliability of position sensor signals; test the monitoring function of temperature sensors; and confirm the alarm function of level sensors.
V. Auxiliary System Inspection
Lubrication System Testing
Verify the operational status of the lubrication system: Check the oil supply condition of the automatic lubrication system; confirm that oil flows smoothly at each lubrication point; verify the reasonableness of the lubrication cycle settings; and test the stability of the lubricating oil pressure.
Cooling System Inspection
Perform an efficiency assessment of the cooling system: inspect the performance of the hydraulic oil cooler; verify the operational status and air velocity of the fan; check the cleanliness and ventilation effectiveness of the radiator; and confirm the accuracy of the temperature control system.
VI. Verification of Safety Devices
Mechanical safety device
Inspect various safety protection devices: Test the leg safety locking function; verify the reliability of the boom limiters; check the integrity of safety features such as guards and shields; confirm the effectiveness of the emergency lowering device.
Hydraulic safety system
Verify the hydraulic system’s safety protection functions: Test the system’s overpressure protection device; check the high oil temperature alarm system; verify the low oil level alarm function; confirm the accuracy of the filter clogging indicator.
7. Test Records and Analysis
Data logging
Detailed records of key data during the testing process: pressure and temperature parameters for each system; action response time data; details of any abnormal phenomena and their corresponding handling measures; and records of test environmental conditions.
Results Analysis
Conduct comprehensive analysis based on test data: Compare with historical data to identify trends in performance changes; pinpoint potential failure risks; propose maintenance and improvement recommendations; and establish a baseline profile of equipment status.
Conclusion
The no-load testing of wet spray carts is an important component of equipment management. Through a systematic testing procedure, we can comprehensively assess the equipment’s condition and promptly identify and eliminate potential faults and hazards. During the testing process, operators must strictly adhere to operational procedures and meticulously record and analyze the data. It is recommended to establish a complete testing archive to provide a solid basis for equipment maintenance and fault diagnosis. Regular no-load testing, combined with scientific maintenance and upkeep, can significantly enhance equipment reliability, extend its service life, and provide robust support for construction projects. Operators should undergo specialized training to master key testing points and judgment criteria, ensuring the effectiveness and accuracy of testing operations.
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
E-mail:19967177733@163.com
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