In recent years, due to the increase of infrastructure construction in China, long arm excavators are more and more important in construction sites, and the demand for long arm excavators is also increasing. As a leader in the machinery industry, Qineng often receives phone calls from many excavator owners asking about the problem of increasing the long arm of the excavator. Now, I want to share some common problems with you.

1.什么样的挖掘机可以改装成长臂挖掘机

1. What kind of excavator can be converted to long arm excavator

不建议对新机器进行改造，因为长臂挖掘机改造后，挖掘机的负荷增加，保修期后容易与原厂产生售后服务纠纷；不建议将机器改装到新机器的50%以下，因为机器的使用寿命相对较长，各方面的性能都会下降。另外，长臂本身具有一定的重量，很难充分发挥长臂挖掘机的效率。好消息是5-80%的新挖掘机被改造成长臂挖掘机。

It is not recommended to retrofit the new machine, because the load of the long arm excavator will increase after the retrofit, and it is easy to have after-sales service disputes with the original factory after the warranty period; it is not recommended to refit the machine to less than 50% of the new machine, because the service life of the machine is relatively long, and all aspects of performance will decline. In addition, the long arm itself has a certain weight, it is difficult to give full play to the efficiency of the long arm excavator. The good news is that 5-80% of new excavators have been converted into long arm excavators.

二、长臂挖掘机的使用范围

2、 Application scope of long arm excavator

有两级挖掘机、三级挖掘机和长臂挖掘机，主要适用于土方基础和深路堑开挖及河道疏浚；长臂三级挖掘机主要适用于高层建筑等工程的拆除。根据杠杆原理和力学原理，长臂挖掘机的受力比原挖掘机要小，所以尽量不要去重的工作场所。

There are two-stage excavators, three-stage excavators and long arm excavators, which are mainly used for earthwork foundation, deep cutting excavation and river dredging; long arm three-stage excavators are mainly used for demolition of high-rise buildings and other projects. According to the lever principle and mechanics principle, the force of the long arm excavator is smaller than that of the original excavator, so try not to go to the heavy workplace.

三.长臂和长臂挖掘机的主要支撑机器重量和配置

3、 Main support machine weight and configuration of long arm and long arm excavator

1.10-16吨位的挖掘机可定制增加长臂和加长大小臂，可加长13米。其配置如下:一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一个连杆组件、一套高压软管、一套长臂(7.1米)和一套长臂(5.9米)、一三吨配重；

1.10-16 tonnage excavators can be customized to add long arms and long arms, which can be extended to 13 meters. Its configuration is as follows: a bucket, a bucket cylinder, six pin shafts, four high-pressure hoses, three grease pipes, a connecting rod assembly, a set of high-pressure hoses, a set of long arms (7.1m) and a set of long arms (5.9m), and one to three ton counterweight;

2.20-22吨挖掘机定制增加长臂和加长大、小臂，可加长15.38米。挖掘机配置有一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一套连杆组件、一套高压软管、一套长臂(8.22米)和一套长臂(7.16米)以及一个配重。

The 2.20-22t excavator can be customized to add long arm, long arm and small arm, which can be extended to 15.38m. The excavator is equipped with a bucket, a bucket cylinder, six pins, four high-pressure hoses, three grease pipes, a set of connecting rod assembly, a set of high-pressure hose, a set of long arm (8.22m) and a set of long arm (7.16m) and a counterweight.

3.20-25吨的挖掘机可定制增加长臂和加长大小臂，可加长18米。其配置如下:一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一套连杆组件、一套高压软管、一套长臂(10m)和一套长臂(8m)以及一三吨配重；

The 3.20-25 ton excavator can be customized to add long arm and long arm, which can be extended to 18 meters. Its configuration is as follows: one bucket, one bucket cylinder, six pin shafts, four high-pressure hoses, three grease pipes, a set of connecting rod assembly, a set of high-pressure hose, a set of long arm (10m) and a set of long arm (8m) and one to three ton counterweight;

4.25-34吨挖掘机定制增加长臂和加长大、小臂，可加长20米。它们的配置如下:一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一套连杆组件、一套高压软管和一套长臂(11米)和长臂(9米)以及一三吨配重；

The 4.25-34t excavator is customized to add long arm, long arm and small arm, which can be lengthened to 20m. Their configuration is as follows: a bucket, a bucket cylinder, six pin shafts, four high-pressure hoses, three grease pipes, a set of connecting rod assembly, a set of high-pressure hose, a set of long arm (11m) and long arm (9m) and one to three ton counterweight;

5.35-40吨位的挖掘机定制增加长臂和加长大、小臂，可加长22米。其配置如下:一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一套连杆组件、一套高压软管和一套长臂(12米)和长臂(10米)以及一三吨配重；

The 5.35-40 tonnage excavator can be customized to add long arm, long arm and small arm, which can be lengthened to 22 meters. Its configuration is as follows: one bucket, one bucket cylinder, six pin shafts, four high-pressure hoses, three grease pipes, a set of connecting rod assembly, a set of high-pressure hose, a set of long arm (12m) and long arm (10m) and one to three ton counterweight;

6.40-50吨的挖掘机可定制增加长臂和加长大小臂，可加长26米。其配置如下:一个铲斗、一个铲斗油缸、六个销轴、四根高压软管、三根黄油管、一套连杆组件、一套高压软管、一套长臂(14米)和一套长臂(12米)，以及一三吨配重。

The 6.40-50t excavator can be customized to add long arm and long arm, which can be extended to 26m. Its configuration is as follows: one bucket, one bucket cylinder, six pin shafts, four high-pressure hoses, three grease pipes, one set of connecting rod assembly, one set of high-pressure hose, one set of long arm (14m) and one set of long arm (12m), and one to three ton counterweight.