Set Plate (OLD) Description
The SG04 Swing Motor Set Plate (Part No. YNF16546) is the OLD-version return plate used in SG04 9805047 swing motor assemblies for excavators. This plate serves as the foundation for piston retraction during hydraulic cycling, ensuring smooth motion, minimal friction, and structural balance. Manufactured by YNF Machinery with hardened steel and accurate machining, this set plate helps restore performance in swing systems that use legacy motor builds. It’s a critical replacement part for hydraulic swing motor rebuilds and aftermarket support of discontinued OEM assemblies.
SG04 Swing Set Plate Technical Sheet
| Parameter |
Value |
| Part Name |
Set Plate / 回程盘（OLD版本） |
| Part No. |
YNF16546 |
| Model |
SG04 |
| Reference No. |
9805047 |
| Application Area |
Swing Motor Return Stroke Section |
| Version |
OLD Type |
| Material |
Hardened Alloy Steel |
| Surface Finish |
Precision Ground |
| Compatible Machine |
Excavators (14-48T class using SG04 motors) |
| Brand |
YNF |
| Origin |
China |
| MOQ |
1 Piece |
| Shipping |
Sea / Air / Express |
| Payment |
T/T, Western Union |
Return Plate Applications
| Application Type |
Description |
| Swing Motor Repair (Old Models) |
Replaces worn return plates in legacy SG04 systems |
| Excavator Rotary Group Service |
Critical for accurate piston retraction motion |
| Parts Stock for Discontinued Units |
Supports hard-to-find pump configurations |
| Aftermarket Distribution |
Popular replacement part for older swing motor assemblies |
| Rebuild Kit Inclusion |
Often paired with piston, cylinder block, valve plate |
SG04 Swing Set Plate OLD Detail Display
What Is a Swing Motor Set Plate (Return Plate)?
The return or set plate ensures the pistons return to position after each hydraulic stroke. In older SG04 motor assemblies, even a slight dimensional deviation in the set plate can cause vibration, stroke imbalance, or oil leakage. YNF16546 provides the original structure and dimensions needed for proper retraction control in hydraulic swing motor systems.
Related Products:
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SG04 Cylinder Block YNF05059
-
SG04 Valve Plate YNF05060
-
SG04 Swing Motor Piston YNF05061
-
Set Plate Ring YNF16545
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Full Swing Motor Rotary Group Kit SG04 Series
FAQs:
-
What does OLD version mean here?
It refers to early-generation SG04 configurations. Confirm with our tech support before ordering.
-
Is this compatible with the latest SG04 builds?
For newer builds, please refer to our updated set plate version.
