Hydraulic pump housing static seal groove-124-15-41920

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Komatsu Bulldozers

Hydraulic pump housing static seal groove-124-15-41920

PRODUCT DESCRIPTION:

The 124-15-41920 is a high-pressure static seal ring specifically designed for Komatsu D65/D85 bulldozer hydraulic systems. It is compatible with hydraulic pump housings, multi-way valve junctions, cylinder end covers, and other static sealing components. Featuring precise factory dimensions and oil-resistant, aging-resistant nitrile rubber (NBR) material, this seal ring ensures stable leak prevention under high-pressure hydraulic shocks and high-temperature conditions. It guarantees reliable system sealing and reduces maintenance frequency.

PRODUCT DETAILS

Core Features

High-pressure leak-proof sealing: An elastic sealing ring is formed between the groove and the mating surface, preventing internal leakage of hydraulic oil and the intrusion of external impurities.

Gap elastic compensation: Rubber elasticity fills the tiny gaps at the mating surface, offsetting the effects of assembly errors and thermal expansion and contraction.

Media isolation protection: Isolates hydraulic oil from external dust and mud, preventing oil contamination, oxidation, and component corrosion.

Shock-resistant buffering: The elastomer absorbs high-pressure pulses and vibrations, reducing the risk of failure caused by impacts to the sealing surface.


Product Superiority

Original factory precision fit: Dimensions and groove tolerances perfectly match, allowing for direct replacement without adjustment, avoiding leakage due to improper gaps.

Oil-resistant and anti-aging material: Nitrile rubber (NBR), resistant to mineral oils and anti-aging, suitable for high-pressure hydraulic conditions.

Long-lasting and stable seal: High compression resilience, not easily deformed by plasticity over long-term use, static seal life ≥4000 hours.

Strong extrusion resistance: Suitable for high-pressure conditions; with a retaining ring, it can withstand higher pressures, reducing the risk of high-pressure extrusion damage.

Easy and efficient installation: No special tools required; simply insert into the groove, reducing replacement difficulty and time.


Installation and Maintenance Points

Before installation, clean the sealing groove and mating surfaces to remove burrs, oil, and impurities to avoid scratching the sealing ring surface.

During installation, avoid twisting or stretching. After embedding into the groove, ensure even fit. For high-pressure areas, it is recommended to use a retaining ring to prevent extrusion.

Tighten the bolts symmetrically to the specified torque to avoid localized overpressure that could damage the sealing ring.

Check for leaks every 2000 hours and replace the sealing ring every 4000 hours to prevent aging and failure.


Fit scenarios and value

Suitable for: High-pressure static seals in hydraulic pumps/valves, hydraulic lines, steering/bulldozer cylinders, etc., suitable for heavy-duty, high-pressure operating environments.

Core benefits: Prevents high-pressure oil leakage, protects hydraulic components, extends system life, and reduces downtime maintenance costs.

SPECIFICATION

Project

Details

Part Number

124-15-41920 (Komatsu Original High-Pressure Static Seal Ring)

Compatible Models

Komatsu D65 (EX/PX/WX), D85 (EX/PX/WX) series bulldozers (including mainstream sub-models such as D65E 12 and D85E 12)

Compatible Parts

Hydraulic pump housing static seal groove, multi-way valve cover mating surface, steering/bulldozing cylinder end cover static seal position, hydraulic pipeline flange interface

Core Category

High-pressure static seal ring (suitable for high-pressure static sealing scenarios in hydraulic systems)

Compatible Operating Conditions

For high-pressure (≤31.5 MPa), oil temperature 80–100℃, dusty and vibrating mining/construction work environments in hydraulic systems.


Parameter Items

Values

Notes

Cross-section Diameter

Approx. 3.55 mm (Standard specification for high-pressure static seal)

Compatible with high-pressure sealing grooves

Inner Diameter

Approx. 45–55 mm (slight variations may occur with random types)

Precise factory matching of mounting positions

Material

Nitrile butadiene rubber (NBR)

High-pressure resistant, oil resistant, compatible with hydraulic oil

Operating Temperature

-30℃ to +120℃

Coveres the hydraulic system oil temperature range

Operating Pressure

≤31.5 MPa (static seal)

Suitable for high-pressure operating conditions in hydraulic systems

Hardness

70–85 Shore A

Balances sealing and extrusion resistance

Tensile Strength

≥16 MPa

Ensures durability during installation and use, preventing breakage over long term

Compression Set

≤18%(70℃×72 h)

Stable sealing


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