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PAI · Probes & Sensors
LST-3633
In stock · ships from Knoxville
This is a low-pressure air brake switch that is normally closed at 0 psi and opens when system pressure reaches 75 psi.
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Verified fitment for 3 applications
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Direct replacement for Mack OE part numbers 745-275083 and 1MR2414. Typically found in stop light circuits or low air pressure warning systems.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 3 of 3.
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It is commonly used in Mack and Volvo trucks to activate the stop lights or signal a low-air warning. When the switch fails, brake lights may stay on or fail to illuminate, indicating it's time for replacement. It threads into the air system via a 1/4-18 NPT port and is a direct aftermarket replacement for Mack OE sensor 745-275083.
Part Number: LST-3633
LOW PRESSURE BRAKE SWITCH NORMALLY CLOSED
Vendor: PAI Industries
Dealer: KP Services Crossville
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