Description
CAT 6L-2731 ADAPTER
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The CAT 6L-2731 is a Caterpillar original hydraulic port adapter (also known as a conversion connector), used for connecting and sealing different specifications of oil ports in hydraulic systems. It adapts to the hydraulic pipelines and pump valve interfaces of equipment such as excavators and loaders, ensuring stable transmission of high-pressure hydraulic oil. It is a key adapter for hydraulic system pipeline connections, which can solve the problem of mismatched oil port specifications and reduce the risk of leakage. Here are the core information and key points:
Core Technical Parameters
Item Details
Part Model: CAT 6L-2731 (6L2731) Hydraulic Port Adapter, Original Equipment Manufacturer, Suitable for Specific Hydraulic Interface Conversion Scenarios
Material: Main body is 4140 chromium-molybdenum alloy steel, surface hardened + galvanized passivation treatment, precision machining of sealing surface, corrosion resistance ≥96 hours neutral salt spray test
Key Dimensions: One end is 3/4″-16 UNF external thread, the other end is 1″-12 UNF internal thread, compatible with JIC 37° conical seal, length 165.1mm, width 38.1mm, height 165.1mm, weight 1.73kg, compatible seal model 238-5082
Compatible Models: CAT 320D/323D excavator, 966H/972H loader, D6R Used in bulldozers and other applications for hydraulic pump outlets, main valve interfaces, cylinder ports, and other pipeline conversion points.
Performance Parameters: Rated working pressure 35MPa, burst pressure 105MPa, working temperature -40℃ to 120℃, compatible with mineral oil, synthetic hydraulic oil, and other media.
Core Functions and Structure:
Interface Conversion and Sealing: Enables conversion between 3/4″-16 UNF and 1″-12 UNF thread specifications. The JIC 37° conical seal structure ensures leak-free operation under high pressure, adaptable to different hydraulic pipeline connections.
High Pressure Bearing and Impact Resistance: Made of 4140 chromium-molybdenum alloy steel, quenched to a hardness of HRC 32-38, capable of withstanding high-pressure hydraulic oil impacts without deformation or breakage.
Corrosion Resistance and Wear Resistance: Galvanized passivated surface treatment resists corrosive environments such as damp and dusty construction sites. Precision machining of the sealing surface reduces seal wear and extends seal life.
Precise Positioning: Thread accuracy grade 6g/6H, taper runout ≤0.02mm, ensuring coaxiality after connection and preventing leaks caused by pipe twisting.
Installation and Maintenance Points
Installation Specifications: Clean the threads and sealing surfaces, removing oil and rust. Apply a small amount of CAT-specific thread sealant (do not use Teflon tape). Tighten with a torque wrench to 35-40 N·m, avoiding over-tightening to prevent damage to the threads or sealing surfaces.
After installation, check the interface for leaks. Ensure there are no leaks and that the pipe connection is smooth and free from twisting.
Maintenance Recommendations: Check every 500 working hours: for leaks at the interface and for damage to the threads. If leaks are found, replace the seals or adapter immediately. When replacing, simultaneously check the compatible pipe interface to ensure there is no deformation.
The original 6L-2731 adapter must be used. Do not use ordinary connectors to avoid high-pressure leaks and equipment failure due to incompatible materials, sizes, or sealing structures.
