Swing Motor Piston Description
This SG04 Swing Motor Piston (Part No. 9805047, YNF05061) is designed to convert hydraulic pressure into mechanical swing motion in excavators. Each piston is precision-ground to exacting tolerances, ensuring smooth reciprocating movement inside the cylinder block. Manufactured with treated alloy steel, it resists deformation and surface scoring, even under heavy loads. Whether you’re a B2B buyer maintaining a parts inventory or a service workshop conducting motor overhauls, this piston is essential for reliable swing function. Explore more about hydraulic swing motor parts to match your full repair needs.
Swing Motor Piston Technical Sheet
| Parameter |
Value |
| Part Name |
Swing Motor Piston (柱塞) |
| Part No. |
9805047 |
| YNF No. |
YNF05061 |
| Model |
SG04 |
| Function |
Converts hydraulic energy to motion |
| Fitment |
SG04 Swing Motor Cylinder Block |
| Compatible Machines |
Excavators with SG04 swing system |
| Material |
High-strength heat-treated steel |
| Installation Area |
Swing Motor Chamber |
| Origin |
China |
| Brand |
YNF |
| MOQ |
1 Set |
| Shipping |
Air Freight / Sea Transport |
| Payment |
T/T, Western Union |
Swing Piston Applications
| Application Area |
Description |
| Excavator Swing Motor Overhaul |
Key wear component in piston-cylinder mechanisms |
| Hydraulic Pump Servicing |
Restores optimal piston-driven swing movement |
| Fleet Maintenance |
Keeps swing functionality efficient and powerful |
| Equipment Distributor Stock |
Commonly replaced part for SG04-type swing drives |
| Aftermarket Component Kit |
Used in piston + block + shoe combo repairs |
SG04 Swing Piston Detail Display
Why the Piston Matters in Swing Motors?
The piston in swing motors plays a core role in hydraulic-to-mechanical energy conversion. A damaged or worn piston leads to reduced swing torque, fluid leakage, and mechanical noise. YNF’s SG04 piston is machined to high precision, ensuring stability and pressure resistance.
Related Products:
-
SG04 Swing Cylinder Block YNF05059
-
SG04 Valve Plate YNF05060
-
Swing Motor Complete Repair Kits
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Hydraulic Swing Motor Seal Kits
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Excavator Swing Gearbox Assemblies
FAQs:
-
Is this piston sold individually or as a set?
Typically offered in sets, but individual units can be arranged.
-
What is the piston diameter and stroke length?
Dimensions match OEM SG04 standards. Please request spec sheet.
