Set Plate Description
The Set Plate (Part No. YNF16489) is a critical element in the PCR-5B-30A hydraulic pump piston assembly. Commonly known as a return plate or back plate, it guides the pistons back to their resting positions after hydraulic actuation. YNF Machinery’s version is built with hardened alloy and CNC-machined surfaces to ensure consistent piston travel and minimal wear. For B2B buyers—whether stocking parts or assembling rebuild kits—this hydraulic pump set plate is vital to restoring piston group balance, efficiency, and long-term performance.
PCR-5B-30A Set Plate Technical Sheet
| Parameter |
Value |
| Part Name |
Set Plate / 回程盘 |
| Part No. |
YNF16489 |
| Model |
PCR-5B-30A |
| Application Area |
Hydraulic Pump Piston Return System |
| Compatible Machines |
Mini/Compact Excavators |
| Compatible Pump |
PCR-5B-30A Hydraulic Pump |
| Material |
Heat-Treated Alloy Steel |
| Brand |
YNF |
| Country of Origin |
China |
| MOQ |
1 Piece |
| Shipping Method |
Sea / Air / Express |
| Payment Terms |
T/T, Western Union |
| Category |
Excavator Hydraulic Pump Spare Parts |
Set Plate Applications
| Application Scenario |
Description |
| Hydraulic Pump Rebuild |
Ensures proper piston return during operation cycles |
| Mini Excavator Repair & Service |
Frequently replaced component in wear-based failures |
| Spare Part Stock for Workshops |
Critical item in piston assembly rebuild kits |
| Aftermarket Part Distribution |
High-demand component for PCR-5B-30A-based pumps |
| OEM Alternative Repair Solutions |
Replaces worn set plates in cost-effective maintenance |
PCR-5B-30A Set Plate Detail Display
What Does a Set Plate Do in a Hydraulic Pump?
The set plate (also called return plate or back plate) guides the piston to reset position during hydraulic cycling. Poor-quality plates may result in piston tilt, misalignment, or scoring inside the cylinder block. YNF’s YNF16489 is machined to high flatness and hardness, guaranteeing excellent support and wear resistance in mini excavator hydraulic systems.
Related Products:
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PCR-5B-30A Piston YNF16487
-
PCR-5B-30A Ball Guide YNF16488
-
PCR-5B-30A Valve Plate YNF16486
-
Cylinder Block YNF16485
-
Main Pump Repair Kit for Compact Excavators
FAQs:
-
Is this interchangeable with other return plates?
Only compatible with PCR-5B-30A configurations—contact us for matching help.
-
Can I include this in a full piston group kit?
Yes, we provide full kits on request with better pricing.
