Description
The PAI LST-3632 is a normally-open pneumatic stop-light switch that replaces Freightliner FSC1749-1121 and the Mack 1MR3359 / 1MR2413 family. The switch closes at 4 psi of supply pressure, completing the brake-light circuit whenever the air-brake service line is pressurized. Coated 1/8 in-27 NPT brass body with 2-pin circular connector.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | LST-3632 |
| Part Type | Stop Light Switch (Pneumatic, Normally Open) |
| Activation | Closes at 4 psi (open at 0 psi) |
| Thread Size | 1/8 in – 27 NPT (with coating) |
| Pin Count | 2 |
| Connector Shape | Circular |
| Overall Length | 1.87 in |
Cross References
This switch replaces or is equivalent to the following part numbers:
- Freightliner: FSC1749-1121
- Mack: 1MR3359, 1MR3359AP1, 1MR3359P1, 25161904, 1MR2413, 1MR2413A
Applications
This stop-light switch fits Mack and Volvo air-brake stop-lamp circuits and Freightliner applications using the FSC1749-1121 pneumatic switch:
- Mack CH, CHN, CXN, CV, CL, CT, RD, Granite, Pinnacle, Vision
- Volvo VN, VNL, VNM, VHD
- Freightliner Cascadia, Columbia, Century, Coronado (with FSC1749-1121 pneumatic stop-light switch)
Verify port thread size, switch polarity (NO/NC), and circuit pressure before ordering.
