How to Extend the Lifespan of a Crushing Hammer

Crushing operations are familiar to those in the excavator industry. Prior to construction, many projects require the removal of stubborn rocks, necessitating the use of high-paying crushing operations. This comes with higher risk and difficulty levels than general operations. For operators, selecting, striking, and maintaining the crushing​ hammer are basic skills. However, in practice, besides hammer breakage, lengthy repair times are also common issues faced by everyone. This article will share how to prolong the lifespan of a crushing hammer.

Inspection: 

The most basic step is to inspect the crushing hammer before use. This cannot be overlooked. Many excavators encounter hammer malfunctions during operation, mainly due to minor abnormalities in the hammer that went unchecked. For example, is the high and low-pressure oil pipe of the crushing hammer showing signs of loosening? Is there any oil leakage in some pipelines? These small details need to be carefully checked to avoid oil pipe detachment due to the high-frequency vibration of crushing operations.

Maintenance:

Regular Lubrication: Regularly and quantitatively apply grease to the crushing hammer during use to prevent excessive wear of vulnerable parts and extend its lifespan. Correct grease application: Insert the drill rod vertically into the ground and press it down. Otherwise, if grease enters the impact chamber and is carried into the cylinder with the piston, it can cause "black oil." Apply grease to the guide sleeve and liner sleeve, trying not to adhere grease to the piston.

Excavator Hydraulic System Maintenance: Replace the hydraulic oil every 2000 hours and the hydraulic return oil filter every 500 hours. (If the working environment is harsh with high dust levels, the replacement time needs to be advanced.)

Crushing Hammer Usage Precautions:

Prevent Air Strikes: During crushing hammer operations, situations where the drill rod is not kept vertical to the crushed object, not tightly pressed against the object, or not immediately stopping operation after crushing often occur. Air strikes can cause body, shell, and arm collisions, leading to malfunctions. Additionally, prevent oblique strikes; strikes should be vertical to the object to prevent the piston from moving non-linearly in the cylinder, potentially causing scratches to the piston and cylinder body.

Minimize Drill Rod Movement: No matter how long you've been in the industry, minimizing drill rod movement during operations is crucial. Accumulated movement can lead to damage to bolts and drill rods. Moreover, promptly correct the bad habits of fast falling and heavy impact on crushed objects.

Operation in Water and Mud: While the probability of using a crushing hammer in water or mud is small, there is still a possibility of construction in such conditions. In these cases, apart from the drill rod, the remaining hammer body parts should not be submerged in water or mud. This is because crushing hammers are composed of precision parts, which are most susceptible to water and mud, seriously affecting piston performance and potentially causing premature hammer failure.

Continuous Operation: During urgent construction periods, drivers may engage in continuous operation. In such cases, extra caution is required. Continuous crushing on hard objects should not exceed one minute in the same position to prevent high oil temperature and drill rod damage.

Pushing Heavy Objects: Pushing heavy objects with the protective plate of the crushing hammer is a dangerous operation. This behavior can damage the hammer itself and, if the crushed model is small, may cause dangerous accidents such as arm breakage or rollovers.

Storage of Crushing Hammer: 

When removing the crushing hammer from the excavator for storage, elevate the rear cylinder side to prevent rainwater from entering. It is best stored in a low humidity room. Improper storage of the crushing hammer, when not in use for a long time, can lead to rusting of the piston and oil leakage. Immediately seal the hydraulic system with a plug when disassembling to prevent foreign objects from entering. Release the nitrogen gas during long-term storage. Pay attention to rust prevention of the piston. After releasing the nitrogen gas from the rear cylinder, push the piston all the way in with the push rod and finally apply rust prevention oil. After removing the drill rod, frequently check the wear of vulnerable parts in the cylinder body and inspect the piston, drill rod striking surface, drill rod, and stop ring sealing cone.

While crushing operations may impact the lifespan of excavators and crushing hammers, as shown in the above discussion, the lifespan of a crushing hammer depends on the adequacy of daily usage and maintenance work. Paying attention to these details when using hydraulic crushing hammers can avoid excavator damage. It can be said that for the same brand of crushing hammer, with proper maintenance and usage, the probability of failure occurring will be much lower.

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