Description
1MR2415 is a Bendix LP-3 style low pressure switch (PAI LST-3634) replacing Mack 1MR2415, Mack 25111726, and Bendix 279472. Normally closed at 0 PSIG with the contacts opening at roughly 70-75 PSIG, fully adjustable down to 5 PSIG, with a 1/4″-18 NPT pipe thread. Used on Mack CH and assorted Mack / Volvo air-system warning circuits.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | LST-3634 (PAI 3634) |
| Replaces | Mack 1MR2415 |
| Part Type | Low Pressure Switch (Bendix LP-3 style) |
| Switch Action | Normally Closed at 0 PSIG; opens ~70-75 PSIG |
| Adjustable Range | Down to 5 PSIG (clockwise = decrease set point) |
| Thread | 1/4″-18 NPT |
| Sealant | No Lock-Tite required |
Cross References
This switch replaces or is equivalent to the following part numbers:
- Mack: 1MR2415, 25111726
- Bendix: 279472 (LP-3)
- PAI: 3634
Applications
This low pressure switch fits the following Mack and Volvo air-system circuits:
- Mack CH series tractors with Bendix LP-3 low-air warning at 1/4″-18 NPT port
- Assorted Mack and Volvo applications using the LP-3 style normally-closed switch on the air system
Verify the existing switch action (NC vs NO), set point, and port thread before ordering. Adjust the set point clockwise to decrease, counter-clockwise to increase.
