Views: 1124 Author: Site Editor Publish Time: 2025-10-31 Origin: Site
When purchasing a second-hand rotary drilling rig, vehicle condition inspection is of utmost importance, which directly affects the subsequent performance and stability of the equipment.
 | Engine: An Examination of the Source of Power |
The engine can be called the "heart" of a rotary drilling rig, and its performance is crucial. Firstly, it is necessary to inspect the appearance of the engine and carefully observe for any signs of oil leakage. Key inspection areas include the cylinder head, fuel injection pump, cylinder nozzle, engine bottom shell, oil inlet pipe filter, etc. If there are oil stains, it may indicate aging seals or other faults. Start the engine and let it idle. Pay attention to whether the speed is stable, whether there is abnormal shaking and noise. If there is unstable speed or abnormal noise, it indicates that there may be wear or assembly problems in the internal components of the engine. You can also check the exhaust condition. Under normal circumstances, the exhaust should have a light color and no obvious odor. If the exhaust emits black smoke, it may be due to insufficient fuel combustion and engine power; If blue smoke is emitted, it is highly likely that engine oil has entered the combustion chamber, resulting in oil burning.
| Hydraulic system: guarantee for precise operation |
The hydraulic system is the key to achieving precise movements in rotary drilling rigs. Check the pump components and pipelines of the entire vehicle to see if there is any oil leakage problem. Even minor oil leakage should not be overlooked, as it may gradually develop into a serious malfunction and affect the normal operation of the equipment. For hydraulic pumps, it is necessary to detect their flow rate and pressure, measure them with professional tools, and compare them with the normal parameters of the equipment. If the flow rate is insufficient or the pressure is unstable, it indicates that the internal components of the hydraulic pump are worn or damaged, which may cause the drilling rig to excavate weakly and move slowly. The distribution valve should also not be ignored. Check for oil leakage and abnormal paint marks. If there is repainting, it may be to cover up repair or fault marks. Attention should also be paid to the entire vehicle's oil pipes to check if the brand of oil pipes is messy. If the brand is inconsistent and the quality is uneven, it may indicate that the oil pipes are frequently replaced and there are hidden dangers.
| Key components: consideration of equipment durability |
In addition to the engine and hydraulic system, there are also some key components that require special inspection. For example, for walking mechanisms, check the degree of wear on wheels, tracks, tracks, and other parts. If the wear is severe, it not only affects the stability of equipment movement, but may also require frequent replacement of parts, increasing the cost of use. Check for any deformation or cracks in working devices such as drill rods and buckets. These parts are prone to damage during high-intensity operations, and if there are hidden dangers, they may break during construction. In addition, the electrical system cannot be ignored. Check the brand, age, electrolyte level, and oxidation degree of the battery pile head. Batteries with severe oxidation or insufficient electrolyte may not be able to provide stable power, affecting equipment startup and operation.
Clear property rights are the basic prerequisite for the transaction of second-hand rotary drilling rigs. If there is a dispute over property rights, it will bring endless trouble to the buyer in the future. There has been a case where a buyer purchased a second-hand rotary drilling rig, but was informed by a third party that the equipment was mortgaged, resulting in the equipment being seized and the buyer losing both money and goods, causing heavy losses.
The equipment purchase invoice is one of the important basis for confirming property rights. By viewing the invoice, it is possible to clarify the initial purchaser of the equipment, as well as information such as purchase price and time. However, currently rotary drilling rigs mostly adopt a credit sales model, such as financial leasing, bank mortgages, installment payments, etc. Customers usually cannot obtain invoices before the payment is made, which requires further verification. For example, for equipment under financing lease, it is necessary to check the financing lease contract and rental payment records to confirm whether the seller has fulfilled its obligations as stipulated in the contract and obtained ownership or disposal rights of the equipment.
In addition to reviewing relevant documents and contracts, it is also necessary to check whether there are any debt disputes with the equipment. You can check whether the equipment has been mortgaged or sealed through some professional query platforms. You can also consult with the cooperating financial institutions of the original purchaser of the equipment to understand their loan repayment situation and ensure that the equipment has no potential debt risks. Before the transaction, the seller can also be requested to provide a property rights declaration to ensure the integrity of the equipment's property rights, without disputes or lawsuits.
Cost performance evaluation is a key step when purchasing a second-hand rotary drilling rig, as it can help buyers make decisions that best meet their needs and budget among numerous options.
The service life of equipment is an important factor affecting cost-effectiveness. Generally speaking, equipment with a shorter service life has a relatively longer remaining service life and a lower probability of major failures in subsequent use, providing users with more stable operational support. For example, a second-hand rotary drilling rig that has only been used for 2-3 years often has advantages in performance and durability compared to equipment that has been used for 8-10 years. Even if the price is slightly higher, in terms of long-term usage costs and operational efficiency, the cost-effectiveness may actually be higher. Due to the long service life of equipment, not only may it face frequent maintenance, but its technology may also be relatively outdated, resulting in reduced operational efficiency.
The number of working hours cannot be ignored either. A low working hour means that the actual operating time of the equipment is short, and the wear and tear of each component is relatively light. Assuming two second-hand rotary drilling rigs of the same model and service life, one with 5000 working hours and the other with 10000 working hours, the equipment with fewer working hours is more guaranteed in terms of remaining life and performance stability. In the case of little price difference, the former has a higher cost-effectiveness.
In addition to the device's own factors, market conditions also play a key role in determining cost-effectiveness. When the supply of second-hand rotary drilling rigs exceeds demand in the market, sellers often make concessions on prices in order to facilitate transactions. At this time, buyers have greater bargaining space and are more likely to choose equipment with high cost-effectiveness. On the contrary, when market demand is strong and supply is relatively insufficient, equipment prices may be higher. When evaluating cost-effectiveness, buyers need to be more cautious and consider the balance between the various performance and price of the equipment comprehensively.
When evaluating cost-effectiveness, it is not enough to simply look at the price. Multiple factors such as equipment performance, quality, usage cost, and maintenance difficulty should be comprehensively considered. Buyers can refer to quotes from different sellers to understand the price range of the same or similar models of equipment in the market. At the same time, they can consult professional mechanical appraisers to obtain a more objective and accurate evaluation of equipment value, and make rational purchasing decisions.
Choosing a second-hand rotary drilling rig is a highly cautious and meticulous task. In vehicle condition testing, a comprehensive and meticulous inspection of the engine, hydraulic system, key components, etc. is carried out, without missing any details that may affect equipment performance, in order to ensure stable operation of the equipment in subsequent use. Property rights verification is a key step in ensuring the legality and compliance of transactions and avoiding disputes. By examining invoices, contracts, and querying debts and claims, it builds a strong defense line for transaction security. And cost-effectiveness evaluation should comprehensively consider factors such as the service life, working hours, and market conditions of the equipment, in order to find the best balance between price and performance. Only by doing well in these three key aspects can buyers select cost-effective and reliable second-hand rotary drilling rigs in the mixed second-hand market, providing strong support for their engineering operations and maximizing economic benefits.
