CAT 126-8185 FLANGE

CAT 126-8185 is a Caterpillar original hydraulic hose flange, primarily used for high-pressure hydraulic hose connections in equipment such as loaders and excavators (e.g., main pumps, main valves, cylinder ports). It is compatible with Caterpillar standard four-bolt flange connections, ensuring sealing and connection strength under high-pressure conditions. It is suitable for models such as the 320D/336D excavator and the 950H loader.

Core Technical Parameters

Item Details
Part Model CAT 126-8185 Hydraulic Hose Flange

Material Low carbon alloy steel (e.g., SAE 1045), galvanized and passivated surface, corrosion resistant, hardness HB 180-220, suitable for high-pressure hydraulic systems, temperature resistance -40℃ to 120℃, suitable for mineral oil/synthetic hydraulic oil, working pressure ≤42MPa

Key Dimensions Suitable hose inner diameter 38mm (1.5 inches), flange outer diameter 140mm, bolt hole center distance 110mm, number of bolt holes 4, hole diameter 14mm, flange thickness 16mm, sealing groove for O-ring (e.g., AS568-214), flange surface roughness Ra≤0.8μm

Compatible Models Suitable for 320D/323D/336D excavators, 950H/962H This product is used in loaders, such as the 430F2 loader, for high-pressure oil pipe connections at main pump outlets, main valve inlets, and large cylinder ports.

Performance Characteristics: Suitable for high-pressure hydraulic systems; four-bolt design ensures connection strength; sealing grooves and O-rings provide reliable sealing to prevent hydraulic oil leakage; galvanized passivated surface enhances corrosion resistance; suitable for frequent vibration and impact conditions.

Core Functions and Structure:

High-Pressure Sealing Connection: As a connecting component between hydraulic oil pipes and hydraulic components, it achieves leak-free transmission of high-pressure hydraulic oil through O-ring sealing and bolt fastening. Suitable for high-pressure components such as main pumps, main valves, and cylinders, ensuring stable hydraulic system pressure.

Positioning and Guiding: The bolt holes and positioning surfaces of the flange ensure precise alignment of the oil pipe and hydraulic components, preventing seal failure due to installation deviations. It meets the rigid connection requirements of high-pressure oil pipes, reducing the impact of vibration on the connection.

Load Bearing and Protection: Withstands the high-pressure load and mechanical vibration of the hydraulic system, protecting the oil pipe connection end and preventing fatigue damage caused by vibration. The galvanized passivated surface prevents corrosion and extends the service life of the flange.