1. Location
  2. Home
  3. Products
  4. SANY
  5. SY75C

SANY Genuine Excavator Piston Back-up Ring 60065260 - PTFE Anti-Extrusion Ring

  1. Home
  2. SANY Genuine Excavator Piston Back-up Ring 60065260 - PTFE Anti-Extrusion Ring
SANY Genuine Excavator Piston Back-up Ring 60065260 - PTFE Anti-Extrusion Ring

Order genuine SANY 60065260 PTFE piston anti-extrusion back-up ring. Specifically designed to protect piston Glyd ring 60065249 from high-pressure gaps on SANY SY55C, SY65C, SY75C, and SY95C excavators. Prevents internal cylinder drifting and seal tearing.

Genuine SANY 60065260 Piston Back-up Ring

1. Technical Specifications & Part Profile

Official Part Number60065260
Industry DesignationBack-up Ring / Anti-Extrusion Ring
Material CompositionPremium Virgin PTFE (Polytetrafluoroethylene)

This component acts as a structural defense shield for the main dynamic seal. The internal piston head assembly utilizes a multi-piece pressure group:

  • Bi-Directional Dynamic Seal: 60065249 (Double-Acting Piston Glyd Ring)

  • Anti-Extrusion Shielding: 60065260 (PTFE Back-up Rings — This Product, configured as a matched pair flanking the Glyd ring).

2. Operating Parameters

  • Working Pressure: Rated up to 32 MPa (structural safeguard for high-load environments).

  • Thermal Endurance: -30°C to +100°C.

  • Architecture: Flat, precision-machined, thin-profile annular ring for dual-groove installation.

3. Core Functional Engineering

Installed inside the piston seal groove (Left Back-up Ring + Glyd Ring + Right Back-up Ring):

  • Anti-Extrusion Safeguard: Bridges structural clearance gaps under high pressure, preventing the O-ring from being shredded or sheared.

  • Dynamic Stabilization: Locks the Glyd ring in axial alignment, preventing rolling or twisting during reciprocating strokes.

  • Heat Reduction: Self-lubricating PTFE profile ensures low-friction contact, reducing cylinder shudder and noise.

  • Leakage Prevention: Maintains main seal integrity, curing symptoms like cylinder drifting and loss of breakout force.

4. Equipment Application

Calibrated for Piston Head Assemblies on SANY Mini Excavator Boom, Arm, and Bucket cylinders:

  • Series: SY55C, SY60C, SY65C, SY75C, SY95C (-9 and -10 models)

5. Diagnostics & Overhaul Thresholds

Replacement is required if:

The back-up rings display stress-flattening, chipping, or fractures. Unified Overhaul Rule: Never reuse old back-up rings. Always replace them concurrently with the 60065249 Glyd ring to ensure proper tolerance matching and prevent premature failure.

6. Genuine vs. Aftermarket

Genuine SANY 60065260 rings feature solid virgin PTFE with laser-etched part numbers and high memory retention. Avoid substandard aftermarket rings, which use brittle, recycled polymers that shatter under pressure, leading to catastrophic seal shredding.

Technical Support: Xuzhou Sinoswift Import & Export Co., Ltd. | Email: [email protected]

Hot Recommendations