Sany KSMN-16BD-21B SY26 excavator Swing motor seal kit replacement

The excavator swing motor is the core component responsible for the machine's 360° rotation, converting hydraulic energy into precise mechanical motion. Our cutting-edge swing motor series combines decades of engineering expertise with advanced materials science to deliver unmatched performance in harsh working conditions.

Working Principle of the Slewing Motor

The slewing motor is a low-speed, high-torque (LSHT) hydraulic motor, typically using an axial piston or radial piston design. Its working principle is based on converting hydraulic oil pressure energy into mechanical energy:

1. Hydraulic Oil Drive: High-pressure oil enters the motor's inlet from the main pump, pushing pistons or gears to move, thereby rotating the output shaft.

2. Torque Output: Through a swash plate or eccentric mechanism, the linear motion of hydraulic oil is converted into rotational motion, delivering high torque to overcome the rotational inertia of the excavator's upper structure.

3. Oil Return Cycle: The low-pressure oil after performing work returns to the tank through the return line, completing the hydraulic cycle.

Processing&Testing

Delivery

• 1.Outside packing: standard export carton packing;
• 2.According to orders, pack the spare parts one by one in a small plastic bag;
• 3.Put them into small carton boxes one by one;
• 4.Put the packed small carton boxes into bigger carton boxes one by one;
• 5.Put the bigger carton boxes into wooden boxes if necessary especially for
• the shipments by sea.

FAQ

1.What is the warranty time of the products?

The warranty time is 3/6 months based on the item details;We don't provide warranty time for original and used products.
2.What is your delivery time?
Generally, we will arrange the goods within 24 hours after your payment;if not in stock, the delivery time will be communied in advance, usually 3-7 days.
3.What are your main products ?
We are specialized in spare parts for excavator hydraulic system, such as travel motor,swing motor, travel gearbox,swing gearbox,gear parts, hydraulic pump;hydraulic parts,etc.lf you need other excavator parts, we also can supply as yourrequirements.
4.How can I do if there is something wrong with the goods?
First at all, we have confidence in the quality of our products, if you really foundsomething wrong, please provide pictures or video for us and we will check.After it is confirmed, please return the goods to us and we will offer the correct item.
5.How do l pay?
You can pay by T/T, PayPal (for small amount) and trade assurance.

Hot-selling

GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.

Our main products are Excavator Hydraulic spare parts, Hydraulic pump, Swing motor, Travel motor, Final drive, Swing gearbox, Travel gearbox, Control valve,Monitor,Controller, Hydraulic cylinder and other hydraulic items with genuine and aftermarket quality. Until now, our products enjoy high reputation all over the world and have been exported to more than 150 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with its own brand "Belparts" are widely acclaimed by foreign customers.

In February 2023, Belparts Yunnan Tourism Team Building

In April 2024, Belparts participated in the Brazil Construction Machinery Exhibition and visited local clients in Brazil.

In April 2024, Belparts participated in the French Construction Machinery Exhibition and visited clients in France and Spain

In May 2024, Belparts Travel Thailand