Hydraulic Piston Pin Description
The Pin (Part No. YNF16491) is a crucial small part that plays a big role in the PCR-5B-30A hydraulic piston pump system. Commonly referred to as a top pin or piston alignment pin, it ensures that pistons and their guiding components stay in proper position during high-speed hydraulic cycling. This part from YNF Machinery is crafted from hardened alloy steel and ground to exact specifications for perfect fitment. Whether you’re rebuilding a mini excavator pump or maintaining a parts inventory for customer service, this hydraulic pump piston pin is an essential component.
PCR-5B-30A Pin Technical Sheet
| Parameter |
Value |
| Part Name |
Pin / 顶针 |
| Part No. |
YNF16491 |
| Model |
PCR-5B-30A |
| Application Area |
Hydraulic Pump Piston Group |
| Compatible Machine |
Mini Excavators |
| Compatible Pump |
PCR-5B-30A Hydraulic Pump |
| Material |
Hardened Alloy Steel |
| Function |
Aligns and retains pistons in position |
| Brand |
YNF |
| Country of Origin |
China |
| MOQ |
5–10 pieces (or as per order) |
| Shipping Method |
Air / Sea / Express |
| Payment Terms |
T/T, Western Union |
Piston Pin Applications
| Application Scenario |
Description |
| Hydraulic Pump Rebuild |
Ensures piston group alignment and secure placement |
| Excavator Pump Maintenance |
Commonly replaced due to wear or during full pump service |
| Piston Assembly Fixation |
Keeps pistons properly oriented in cylinder block |
| Spare Parts Resellers |
Small, fast-moving item in parts inventory |
| OEM or Aftermarket Repair Kits |
Included in complete PCR-5B-30A piston kits |
PCR-5B-30A Pin Detail Display
Why the Pin Matters in a Hydraulic Pump?
While small in size, the pin is critical in ensuring the pistons, ball guide, and set plate remain securely aligned in motion. A damaged or loose pin can lead to misalignment, excessive vibration, or internal wear. YNF’s YNF16491 is manufactured to tight tolerances, making it a trusted component in excavator hydraulic piston repair applications.
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