There are different called names for center joint.

It goes by rotary manifold, rotary union, center swivel, and swivel joint.

On hydraulic excavators, the center joint makes it possible for the housing to turn without affecting the flow of pressurized hydraulic fluid to the travel motors.

Sometimes, the travel motor final drive will act without power.

And you may think it is necessary to replace your final drive.

But wait a minute. You should check your center join first.

Sometimes a problem with the center joint can affect the performance of your final drives.

When the center joint seals start leaking, after a while, the hydraulic motors may no longer be receiving all the hydraulic fluid they need.

Thus the hydraulic motor shows powerless.

Sonka Company offers high-quality products and outstanding OEM service.

HQPA stands for High Quality Product Assurance!

The TPU seal raw material is from HUNTSMAN, LANXESS, BASF, Parker. PTFE Seal is using raw material DAIKIN imported from Japan.

At present, Sonka Company has established long-term relationship with many foreign companies. To

choose the seals of Sonka Company is the assurance of the quality.

Guangzhou Sonka Engineering Machinery Co., Ltd.

Loion: Guangzhou, China

Business scope:excavator spare parts

Fit for machine model brand: Komatsu, Hitachi, Kobelco, Kato, , Daewoo, Sumitomo, Hyundai, Volvo

Start

Sonka Company grew out of Global Engineering Machinery.

Time back in 2009, a spare parts shop named GLOBAL ENGINEERING MACHINERY established in Guangzhou City. Soon but stably, it sold its spare parts to more than 30 cities in domestic China in the same year, with the fame spreading far and wide, for the good product quality and service.

At that time the shop mainly sold mainly in seal and seal kits lines: excavator seal kits, loader seal kits, bulldozer seal kits, breaker seal kits and other construction machinery-related seals.

Growing

To meet customer’s growing needs on seal kits, in 2013, a new company named Guangzhou Huanqiu Seal Technology Co. LTD was set up to handling the seal factory. Factory manufactures all kinds of seals for construction machinery.

It then lay solid foundations for oncoming development.

HQPA stands for High Quality Product Assurance!

Expand

With rich experience and established technique, customers are satisfied with our seal kits for high quality and good performance.

And we would like to share these seal kits with the world outside China. In the year of 2014, we creates the Guangzhou Sonka Engineering Machinery Co. Ltd, a branch trading company, to deal with all the oversea business.

Prospect

In the year 2020, Sonka Company will upgrade our brand. We will set up Management Service Center in the oversea market to promote our uniform brand all over the world.