Sealing Assembly for Hydraulic Systems-17M-30-26680

Core Features

Double protection seal

Prevent internal leakage: Prevent hydraulic oil from flowing between chambers within the system to ensure hydraulic system efficiency.

Prevent external leakage: Prevent high-pressure hydraulic oil from leaking from the equipment interior to the external environment

Dust and dirt protection: Preventing the soil, gravel and other impurities from entering the hydraulic system, protecting the precision hydraulic componentsapplication scenarios

Hydraulic System of Working Device: Sealing of Piston Rod of Lifting/Tilt Cylinder and Pushing Rake Cylinder

Walking System: Sealing of Transmission Output Shaft and Final Drive

Steering System: Steering Cylinder, Central Rotary Joint Seal

Auxiliary System: Hydraulic Pump Shaft Seal, Distribution Valve Interface Seal

Product Superiority

1. Structural Design Advantages

Bilateral lip seal + metal frame structure: The primary lip seal ensures leak-proofing, while the secondary lip seal provides dust protection. The metal frame enhances structural stability and prevents deformation.

Built-in constant-pressure spring: Provides continuous radial clamping force, maintaining excellent sealing performance even after shaft diameter wear, extending service life by 30%

Multi-stage sealing combination: Adopted a three-layer protection design of "primary seal + auxiliary seal + dust lip" to ensure no leakage under high-pressure impact.

2. Material and Performance Advantages

Special synthetic rubber: Made from Komatsu's proprietary HNBR (hydrogenated nitrile rubber), with a temperature range of-40°C to +120°C. Its oil resistance is twice that of conventional NBR rubber, and its aging resistance is enhanced by 50%.

Enhanced wear resistance layer: The sealing lip employs a specialized formulation with a Shore hardness of A85-90, achieving a 40% improvement in wear resistance and adapting to high-speed friction conditions.

Anti-extrusion design: The cross-section features an arc-shaped transition, preventing "extrusion" into the mating clearance under 32MPa high pressure, thereby extending service life.

3. Reliability and Maintenance Advantages

Extremely long service life: up to 8,000 working hours under normal conditions, 2-3 times longer than conventional auxiliary components, significantly reducing maintenance frequency and costs.

Maintenance-free design: One-time installation ensures long-term reliable operation, reducing downtime for maintenance

Precision OEM compatibility: Engineered for D275 series bulldozer hydraulic systems, seamlessly integrates with all components to ensure optimal sealing performance.

Easy replacement: Modular design allows individual module replacement without dismantling the entire hydraulic system, reducing maintenance time by 50%

Installation Points

Cleaning: Thoroughly clean the shaft surface and sealing cavity before installation to ensure no impurities or oil contamination.

Lubrication Preparation: Apply a dedicated hydraulic system grease (containing MoS₂) to the sealing lip to reduce initial friction.

Correct Installation: Use a dedicated tool to press in smoothly, avoiding deformation of the sealing lip. Do not hammer.

Orientation Confirmation: Ensure the dust lip faces outwards (towards the source of contamination) and the sealing lip faces inwards (towards the hydraulic system).

Gap inspection: After installation, check that the axial clearance is ≤0.1mm and ensure there is no play.

Maintenance and Care

Daily Inspection: Visually inspect the sealing areas for leaks before each operation.

Regular Maintenance: Check the sealing condition every 500 working hours, and replenish grease if necessary.

Leak Handling: Immediately stop the machine and repair any leaks to prevent further damage from hydraulic system failure.

Preventive Replacement: It is recommended to perform preventive replacement every 4000 working hours or annually (whichever comes first) to ensure system reliability.

Summary

Seal 17M-30-26680 is the "guardian" of the hydraulic system of the Komatsu D275 series bulldozers. Its composite structure design, consisting of a double lip, metal frame, and built-in spring, ensures excellent sealing performance even in the high-pressure, high-temperature, and high-pollution working environment of bulldozers. Choosing genuine Komatsu seals not only guarantees efficient equipment operation but also significantly reduces maintenance frequency and total cost of ownership, making it a key component for improving the reliability and service life of the D275 bulldozer.