What Should Be Checked When Purchasing A Second-hand Rotary Drilling Rig

When purchasing a second-hand rotary drilling rig, a comprehensive and meticulous inspection is the key to avoiding risks and ensuring the performance of the equipment. The following provides inspection points from six core dimensions:

1.Engine condition inspection: After starting, observe the color of the exhaust gas (normally colorless or light gray), listen for any abnormal sounds (such as knocking, turbine howling), check if the oil dipstick is emulsified and if the coolant is abnormally consumed, and judge the health of the core power system.

2. Hydraulic system leakage inspection: Focus on checking the piston rod of the cylinder, oil pipe joints, distribution valves and other parts, observe whether there are oil stains or signs of hydraulic oil emulsification, test the smoothness and pressure stability of each action (such as drilling, rotation, and walking), and avoid hidden oil leakage or component wear.

3. Inspection of structural component damage: Check whether the welds of key structural components such as drill pipes, masts, and chassis are cracked or rusted, and whether the bolt connections are loose. Observe the wear degree of load-bearing parts such as tracks and legs, and assess the overall rigidity and safety of the equipment.

4. Electrical system function test: Test whether the indicator lights on the instrument panel, sensors (such as speed and pressure sensors), lighting and control system are normal. Check whether the wiring harness is aged or damaged, and whether the joints are oxidized or loose to ensure the accurate transmission of operation instructions.

5. Working hours and maintenance records: Check if the hours displayed on the instrument panel are consistent with those on the equipment's history sheet. Provide complete maintenance and repair records, with a focus on key maintenance histories such as major engine overhauls and hydraulic pump replacements, to assess the actual usage intensity and maintenance status of the equipment.

6. Test drive and load test: Conduct test drives under no-load and full-load conditions to observe whether the drilling speed, rotary accuracy, and braking performance meet the standards, and check whether the gear switching is smooth. Verify the power output and stability of the equipment through actual operations.

Conclusion: When purchasing second-hand rotary drilling RIGS, one should adhere to the principle of "observation, listening, inquiry, and testing", conduct in-depth verification from multiple systems such as power, hydraulics, structure, and electrical systems, and combine usage records with practical operation tests. Only in this way can the value of the equipment be accurately evaluated to avoid a sharp increase in subsequent operation and maintenance costs due to hidden defects.