SEM wheel loader parts 5339073 Brake light switch tee

Part Number: 5339073 Standard Name: Brake Light Switch Tee Assembly / Air Brake Pressure Tee (Integrated Brake Light Pressure Sensor Switch)
Compatible Brand: SEM (Category Caterpillar)
Related Parts: Compatible with complete air brake piping accessories (5217548 oil-water separator connector, 5360518 brake hose, 5360555 brake copper pipe, 5219660 hollow bolt), suitable for loaders and graders equipped with ZF 4WG200 electronically controlled transmissions.

II. Compatible Models

1) 5-ton wheel loaders: SEM650B, SEM655D, SEM656D, SEM658F

2) Graders (ZF4WG200 gearbox model): SEM915, SEM918, SEM922

III. Installation Location and Core Functions

1. Installation Point: At the outlet branch of the vehicle's main brake valve and the branch of the air reservoir pipe. Replaces a standard tee connector. The tee has one inlet and two outlets, and integrates a pneumatic brake light pressure switch.

2. Two Core Functions

* **Air Circuit Divider Tee:** Distributes compressed air, one path to the service brake chamber and the other to the gearbox brake interlock valve.
* **Pressure-Sensitive Brake Light Switch:** When the brake is applied, air pressure is built up in the air circuit, the internal pressure contacts are activated, and the vehicle's brake lights illuminate. Simultaneously, a braking signal is transmitted to the gearbox TCU.