3/4 Inch Hydraulic Hose Assemblies

A 3/4 inch hose does not have one universal flow rate. Suitable flow depends on the hose construction, fluid velocity, pressure drop, circuit design, temperature and application. Flow should be confirmed against the specific hose manufacturer’s data and the equipment requirements. McCann can help select the appropriate assembly rather than estimating flow from bore size alone.

Yes. McCann states that custom hydraulic hose assemblies from 1/4 inch to 1 inch can be made in the shop or on site. A mobile service truck can fabricate an assembly at equipment that cannot be transported easily. Confirm availability, labour charges and the required hose and fitting configuration with the branch before dispatch.

Bring the failed hose as a sample whenever possible, along with the machine make and model, circuit application, hose length, end fitting types, hydraulic fluid and operating requirements. The failed assembly helps identify the routing and connections. Pressure rating, temperature compatibility and bend-radius requirements must be confirmed for the specific replacement construction.

A 3/4 inch assembly may be used in suitable excavator, skid steer, compact track loader and other attachment circuits, but bore size alone does not determine suitability. The circuit’s flow, pressure, impulse conditions, fluid, fittings and routing must be evaluated. McCann supports applications including auxiliary, breaker, grapple, auger, boom and return-line circuits.

SAE J517 defines hydraulic hose constructions in the 100R series, while SAE J1273 covers selection, routing, fabrication, installation, storage and maintenance. The hose, fittings and crimp die should come from the same qualified manufacturer system so the assembly’s published rating remains valid. ISO 4406 cleanliness practices may also apply to the connected hydraulic system.

Before removing a hose, isolate the equipment, lower or mechanically block suspended loads and relieve stored hydraulic pressure using the equipment’s approved procedure. Never search for a pinhole leak with your hand because pressurised fluid can cause an injection injury. Use cardboard to identify leaks, keep new assemblies capped until installation and follow applicable OSHA lockout/tagout requirements.