A road roller is a core construction machine for road compaction projects. Standard pre-operation inspection is essential to ensure construction safety, avoid mechanical failures, extend equipment service life, and guarantee compaction quality. Before starting and using the road roller, operators must conduct a comprehensive, detailed inspection covering appearance, mechanical systems, safety devices, and working environment. The main inspection items are as follows.
1. General Appearance and Structural Inspection
First, conduct a visual overall check of the road roller’s body structure. Inspect the roller drum for cracks, serious wear, deformation, adhesion of hard sundries or uneven wear marks, as a defective drum will directly affect the flatness and compaction density of the road surface. Check the vehicle frame, connecting brackets and welding parts for loose deformation, cracks or damage. Examine all external bolts, nuts and fasteners to ensure no looseness, missing or falling-off parts. In addition, clean up dirt, gravel and residual materials attached to the body and drum to prevent foreign matters from interfering with normal operation.
2. Fluid System Inspection
The fluid system is the key to the normal operation of the road roller, including engine oil, fuel, hydraulic oil, cooling water and brake fluid. Check the engine oil level via the oil dipstick to ensure it is between the standard upper and lower scales; insufficient oil will cause engine wear, while excessive oil will lead to oil burning and power reduction. Verify the fuel volume to meet the construction demand and check the fuel pipeline for leakage, aging or blockage.
Inspect the hydraulic oil tank level and observe whether the hydraulic oil is turbid, deteriorated or mixed with impurities, as unqualified hydraulic oil will cause failure of the hydraulic steering and compaction system. Check the cooling water level of the water tank to prevent engine overheating during long-time operation. Meanwhile, confirm the brake fluid level is normal and the pipeline has no leakage to ensure effective braking performance.
3. Engine and Power System Inspection
Before starting the engine, check the air filter for blockage and dirt accumulation to ensure smooth air intake and sufficient engine power. Inspect the fan belt, generator belt and other transmission belts for looseness, aging, cracking or excessive wear, and adjust the belt tightness to the standard range if necessary. After starting the engine in a static state, let it idle for 3 to 5 minutes, observe the instrument panel indicators, and confirm that no fault warning lights are on. Listen to the engine operation sound to exclude abnormal noise, stalling or jitter, and check the exhaust condition to ensure no abnormal black smoke or blue smoke.
4. Steering, Braking and Walking System Inspection
The walking and control system directly determines the operation safety of the road roller. Before formal construction, test the steering system to check whether the steering is flexible, accurate and free of lag, deviation or stuck phenomena. Inspect the tire pressure (for tire rollers) and tire surface condition, ensure no air leakage, serious wear, bulges or cracks, and check the wheel hub for looseness. For steel wheel rollers, confirm the walking mechanism operates smoothly without jamming.
Test the service brake and parking brake repeatedly to verify sensitive and reliable braking effect, no brake failure, partial brake or brake dragging problems. Check the clutch and transmission system for smooth gear shifting without stuttering, slipping or abnormal impact.
5. Hydraulic and Compaction System Inspection
Turn on the hydraulic system and test the lifting, lowering and vibration functions of the roller drum. For vibratory rollers, switch different vibration frequencies and amplitudes to confirm the vibration system works normally with no abnormal vibration or noise. Check all hydraulic pipelines and joints for oil leakage, extrusion damage or loose connections. Ensure the compaction control system is sensitive and the instrument display data is accurate, which guarantees precise control of compaction parameters during construction.
6. Electrical System and Instrument Inspection
Check the battery connection terminals for firmness, no oxidation, looseness or corrosion, to avoid poor circuit contact affecting startup and operation. Inspect all lighting equipment including working lights, warning lights, turn signals and brake lights to ensure normal lighting and warning function. Check the horn, reversing alarm and warning device to confirm they work effectively for on-site safety reminder. Verify that all instrument dials (speed meter, oil pressure gauge, water temperature gauge, hydraulic pressure gauge) display normally and accurately.
7. Safety Protection Device Inspection
Safety devices are the last line of defense for construction operation. Check whether the safety guardrails, protective covers and anti-fall devices of the equipment are intact and firmly installed. Confirm the emergency stop button is sensitive and effective, which can quickly cut off power in case of emergency. Check the fire extinguisher equipped on the vehicle to ensure it is within the valid period and placed firmly for emergency use. In addition, ensure the operator’s cab has a clear view, and the seat and safety belt are intact and usable.
8. Working Environment Pre-inspection
Besides equipment inspection, the on-site construction environment must be checked in advance. Confirm the construction road surface is flat, clean, and free of large obstacles, deep pits and unstable foundations that may affect roller operation. Check the construction boundary, avoid overhead obstacles such as wires and buildings, and confirm a safe operating space. Arrange on-site warning signs and isolation facilities to prevent irrelevant personnel from entering the operation area and causing safety accidents.
Conclusion
Complete pre-operation inspection is a mandatory procedure for road roller operation. Operators must strictly implement full-item inspection, record hidden dangers in a timely manner, and stop using the equipment for maintenance if any faults are found. Only after all inspection items are qualified can the road roller be put into construction, so as to ensure safe, stable and high-efficiency compaction operation.
