(extra long cylinder,produced by Hengyu Group）

extra long cylinder are widely used ，because of excellent temperature resistance，no transmission clearance，powerful torque.So our company has designed extra long cylinder for our customers.

Introduction to extra long cylinder:

When installing the extra long cylinder, the axial ends of the extra long cylinder cannot be fixed. Due to the effect of liquid pressure and thermal expansion in the extra long cylinder, there is axial expansion. If the two ends of the extra long cylinder are fixed, all parts of the extra long cylinder will be deformed. When disassembling the extra long cylinder, it is strictly forbidden to hammer the extra long cylinder and the piston surface, such as the extra long cylinder hole and the piston surface is damaged, do not allow sandpaper grinding, to use a fine oil stone carefully grinding. The clearance between the guide sleeve and the piston rod should meet the requirements.

extra long cylinder can not drive the load troubleshooting: oil pressure is too low. extra long cylinder selection specifications are too small. Leakage in extra long cylinder or associated hydraulic system element.

When the extra long cylinder is in use, measures should be added to prevent the intrusion of pollutants. Effective measures should be taken to control the intrusion of pollutants, such as installing high-efficiency air filters in the tank breathing holes, new oil must be filtered, etc., but also must improve the anti-pollution ability of the extra long cylinder itself. In the seriously polluted environment, it is more important to pay attention to, such as the underground oil extra long cylinder should use fluorine rubber (FRM) and nitrile rubber (NBR) dust ring, and the ground mechanical extra long cylinder should use nitrile rubber dust ring; The filter device is added to the oil inlet of the extra long cylinder of the dump truck, construction machinery, work platform and other equipment, and in order to reduce the oil inlet resistance, the flow area should be increased as much as possible, which can effectively reduce the particle pollution from the system.

If air enters the hydraulic system, the extra long cylinder will not operate normally, mainly because there is a leak in the system. At this time, check the liquid level of the hydraulic tank, the seals and fittings on the oil suction side of the hydraulic pump, and whether the oil suction filter is too dirty. If so, the hydraulic oil should be replenished, seals and fittings should be treated, and the coarse filter element should be cleaned or replaced.

Answers to some questions about extra long cylinder:

What causes hydraulic cylinder oil leakage?
1. Internal leakage (1) The wear ring on the piston is seriously worn, leading to friction between the piston and the cylinder liner, and finally strain the cylinder liner, piston and seal; 2) Seal long-term use failure, piston seal (mostly U, V, Y ring, etc.) aging; 3) The hydraulic oil is dirty, and a large number of impurities enter the cylinder and wear the piston seal to bad; 2. External leakage 1) cylinder inlet and outlet tubing joint cracking; (This I see in the actual work is still more) 2) The piston rod extension end with the piston rod seal damage, mostly due to the piston cylinder is caused by hair, but also caused by aging; 3) The seal between the extended end of the piston rod and the liner is damaged.

Does the abbreviation bc stand for bucket cylinder or boom cylinder?
Hydraulic excavator hydraulic cylinder includes boom cylinder, bucket rod cylinder and bucket cylinder three parts, four cylinders. Because of the different naming conventions of major manufacturers, the meaning of BC is also different, for the sake of insurance, you need to consult the manufacturer.