Combination Seal Ring for Komatsu-14X-15-29230

Core Features

High-pressure dynamic seal: Forms a stable oil film under high-frequency reciprocating piston rod, preventing hydraulic oil leakage and preventing dust and mud from entering the cylinder, protecting the internal piston and cylinder wall.

Low-friction guide: Reduces frictional resistance between the piston rod and the seal, preventing creep and ensuring linear cylinder response and smooth operation.

Automatic compensation: The elastomer provides continuous preload, compensating for wear and assembly clearances, maintaining sealing force over the long term.

Extrusion protection: Built-in retaining ring prevents the sealing lip from being squeezed into the gap under high pressure, adapting to pressure shock conditions.

Product Superiority

1. Material and Structural Advantages

High-end Material Combination: The main sealing ring is filled with polytetrafluoroethylene (PTFE + copper powder), with a friction coefficient ≤0.15 and wear resistance; the elastomer is fluororubber (FKM), oil-resistant, high-temperature resistant (-40~+120℃), aging-resistant, and with a lifespan ≥5000 hours.

High-efficiency Combination Structure: The shaft seal (PTFE ring + FKM elastomer + metal retaining ring) has a dynamic seal leakage rate ≤0.1 mL/min and a static seal leakage rate ≤0.05 mL/min, meeting original factory standards.

Precise Original Factory Matching: The groove dimensions are completely consistent with the D65/D85 cylinder end cap, requiring no re-grinding during installation, with a fit ≥99%.

Compatible with All Operating Conditions: Adaptable to 35 MPa high pressure and ≤1.2 m/s reciprocating speed, impact-resistant and extrusion-resistant, preventing seal failure caused by pressure fluctuations.

2. Performance and Maintenance Advantages

High Sealing Reliability: Dynamic seal life ≥ 5000 hours, 60% longer than ordinary NBR seals.

Low Friction and Low Power Consumption: Frictional resistance ≤ 50 N, reducing hydraulic system energy consumption and improving operational efficiency.

Low Maintenance Costs: Modular replacement eliminates the need to disassemble the cylinder, reducing maintenance time by 40% and avoiding machine

downtime.

Installation and Maintenance Points

1. Installation Points

Cleaning Inspection: Clean the piston rod and end cap grooves, ensuring no scratches or burrs; check the sealing ring for deformation and the lip for damage.

Assembly Specifications: Use a special tool to press the sealing ring into the groove, with the lip facing the pressure side; apply a small amount of hydraulic oil to the elastomer to prevent the lip from turning over.

Clearance Control: The radial clearance between the sealing ring and the piston rod should be ≤0.05 mm to ensure a tight seal and smooth reciprocating motion.

Pressure Test: After assembly, hold the pressure at 35 MPa for 5 minutes; no leakage indicates it is合格 (qualified).

2. Maintenance and Care

Daily Inspection: Visually inspect the piston rod every shift for oil film buildup and leakage, and ensure the dust seal is undamaged.

Regular Replacement: Preventative replacement is recommended every 5000 hours or 3 years (whichever comes first) to prevent seal failure.

Troubleshooting: When the cylinder leaks, first check the wear of the sealing ring and the condition of the retaining ring; replace if necessary and repair any scratches on the piston rod.

Fit scenarios and value

14X-15-29230 delivers reliable dynamic seals for D65/D85 bulldozer cylinders, featuring composite materials, precision engineering, and high-pressure compatibility. Manufactured with original factory-grade quality assurance, it ensures low friction, extended service life, and zero leakage – effectively reducing maintenance frequency and costs while enhancing overall operational efficiency. For specific technical specifications, please refer to Komatsu's official technical manual. Installation recommendations are available through authorized dealers.