Hydraulic pump caused the main reason for the boom can not raise the load 1. pump heavy wear. At low speed pump leak serious; high-speed operation, the pump pressure is slightly increased, but due to wear and internal leakage of the pump, volumetric efficiency significantly decreased, it is difficult to reach the rated pressure. Pump wear and tear aggravated by long working hours, temperature rise, the resulting wear of hydraulic components and seals of aging, damaged, loss of sealing ability, hydraulic oil deterioration, leading to failure. 2. The selection of hydraulic components unreasonable. The boom cylinder specifications for the 70/40 non-standard series, seals also non-standard parts, high manufacturing cost and inconvenience of replacing the seal. Boom cylinder bore small, is bound to make the system set pressure is high. 3. The hydraulic pump system design is unreasonable. Figure 1 shows, control valves and hydraulic steering gear as a single pump series, the safety valve set pressure points 16MPa, while the rated working pressure of the hydraulic pump is 16MPa. Pumps often work at full load or prolonged overload conditions, pneumatic drills sales, and system Hydraulic shock, Shandong pneumatic drills, long-term oil changes, hydraulic oil contamination, increased pump wear, hand-held pneumatic drills, so that hydraulic pump casing burst. How rotary drilling rig works, what works? Currently rotary drilling rig works the drill pipe in the form of multi-use connection bucket dig and dig slag slag during drilling mud circulation mode in the use of pneumatic drills, mud lubricant for such rigs, support, replacement and carry drilling slag effect. With the urban construction and environmental protection requirements become more stringent, the traditional rig face greater crisis. The rotary drilling rig power head forms and rotary drilling rig working principle is to use a short screw drill or auger bucket, using the powerful torque directly to the soil or gravel mining and other rotary drilling residue, and then quickly make holes outside, without the need for mud Supporting the case of dry construction can be achieved, even in the case of special needs Slurry Wall formation, the mud also play a supporting role only, the drilling mud content is very low, which makes pollution greatly reduced, thereby reducing the construction cost , but also improve the construction environment, high efficiency into the hole. This is the rotary drilling rig with good environmental properties. Hand-held pneumatic drills, dragon industry machinery, pneumatic drills provided by Shandong Machinery Co., Ltd. Dragon. Machinery Co., Ltd. Shandong Long (www.longyejixie.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!