Set Plate Ring Description
The Swing Motor Set Plate Ring (Part No. YNF16545) is a precision-machined spacer used in the SG04 swing motor assembly for excavators. Known as a “介子” in Chinese hydraulic repair terminology, this component is positioned between the set plate and piston group to maintain correct spacing, motion clearance, and pressure distribution. YNF Machinery’s set plate ring is engineered with tight dimensional tolerances to avoid misalignment and premature wear in hydraulic swing systems. It is a critical part for excavator swing motor rebuilders and parts distributors ensuring performance consistency.
SG04 Set Plate Ring Technical Sheet
| Parameter |
Value |
| Part Name |
Set Plate Ring / 介子 |
| Part No. |
YNF16545 |
| Model |
SG04 |
| Reference No. |
9805047 |
| Function |
Maintains spacing in swing motor assembly |
| Material |
Hardened Steel Alloy |
| Surface Treatment |
Polished or Anti-Rust Coating |
| Compatible Machine |
14-48T Excavators with SG04 Swing Motor |
| Application Area |
Swing Motor Hydraulic Section |
| Brand |
YNF |
| Country of Origin |
China |
| MOQ |
1 Piece |
| Shipping Method |
Express / Air / Sea |
| Payment Terms |
T/T, Western Union |
Set Plate Ring Applications
| Application Area |
Description |
| Swing Motor Repair |
Spacer for piston group alignment and stroke control |
| Excavator Hydraulic System |
Ensures correct component spacing in SG04 motor |
| Repair Kit Assembly |
Included in full swing motor rebuild kits |
| Spare Part Inventory |
High-frequency wear part for service centers |
| OEM/Aftermarket Replacements |
Alternative to original SG04 9805047 intermediary ring |
SG04 Set Plate Ring Detail Display
Why Is the Set Plate Ring Important?
Also referred to as an “intermediary ring” or “swing motor spacer,” this part keeps the internal components like the set plate, piston group, and valve plate properly aligned. Without it, component clash, imbalance, or oil leakage may occur. YNF’s SG04 set plate ring YNF16545 is built to ensure lasting integrity under rotational stress in excavator swing motor systems.
Related Products:
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SG04 Swing Motor Piston YNF05061
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SG04 Valve Plate YNF05060
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SG04 Cylinder Block YNF05059
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Swing Motor Bearing and Seal Kits
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Full Rotary Group Assembly for SG04
FAQs:
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Is this ring model-specific?
Yes, only for SG04 series motors. Confirm your motor model with us.
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Can I order in bulk for resale?
Absolutely—contact our sales team for B2B pricing tiers.
