Verify the OEM number 47307-E0310 on your original connector before ordering. This is a union connector designed for Hino medium and heavy-duty trucks. Confirm thread type, diameter, and application (air brake, fuel, or other system) before purchase. Professional installation recommended. Replace sealing components simultaneously.

: The 47307-E0310 connector is a precision-machined metal fitting for Hino 500 and Hino 700 series trucks. Constructed from high-grade steel with corrosion-resistant surface treatment. This connector serves as an intermediate fitting for pneumatic or fluid lines in heavy-duty commercial vehicle systems, including air brake circuits, fuel delivery lines, or clutch actuation circuits on manual transmission variants. Common applications include linking air lines between reservoirs and valves, connecting fuel filter housings to injection pump supply lines, or joining vacuum lines for EGR and braking assistance. Direct fit replacement for original equipment. Typical failure includes thread galling from overtorque, surface corrosion from road salt exposure, and seal groove damage from improper installation. Replacement restores leak-free connections and system integrity.

Seal Replacement: When installing a new connector, replace all associated sealing components. Copper washers, O-rings, and thread sealants have single-use lifespans. Reusing old seals invites pressure loss and system contamination.

Thread Inspection: Examine internal and external threads on the mating ports. Damaged threads compromise sealing and structural integrity. Chase damaged threads with a tap or die of the correct size before installing the new connector. Do not force the connector into cross-threaded ports.

Torque Specification: Tighten the connector to manufacturer specification. Overtorque strips threads and cracks housings. Undertorque allows pressure loss and vibration loosening. Use a calibrated torque wrench for final tightening.

Q1: Which Hino trucks use 47307-E0310?
A1: This connector fits Hino 500 series and Hino 700 series trucks. Confirm fitment for your specific chassis and year using your original part number.

Q2: What is the difference between 47307-E0310 and 43534 04300?
A2: Both numbers reference the same component. 47307-E0310 is the primary Hino part number. 43534 04300 is an alternate reference number found in parts catalogs.

Q3: Which system does this connector belong to?
A3: The 47307-E0310 connector is used in pneumatic systems such as air brake circuits on Hino 500 and 700 series trucks. Also compatible with fuel and vacuum systems.

Q4: Does the connector include sealing washers or O-rings?
A4: No. This listing includes the connector only. Copper washers, O-rings, or thread sealant must be ordered separately depending on application.

Q5: How do I identify a failed connector?
A5: Visible corrosion, stripped threads, pressure loss at the fitting point, fluid seepage around the connection, or connector body deformation from overtightening.