Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

PAI Industries · Electrical & Lighting
LST-3434
In stock · ships from Knoxville
This low pressure switch monitors air pressure in heavy-duty truck air systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Direct replacement for Mack OE 1MR2414A and 20791291. Also cross-references to PACCAR numbers 80685, K301394, K301-394. Adjustable pressure setting; normally closed at 0 PSI, opens at 70–75 PSI.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It is normally closed when pressure is at zero and opens at around 70 PSI, signaling that normal operating pressure has been reached. The switch is adjustable down to 5 PSI and features a 1/4-inch NPT thread with a circular connector. It is commonly used on Mack CH models and select Volvo applications as a direct replacement for OE part numbers 1MR2414A and 20791291.
Part Number: LST-3434
LOW SWITCH,MAK1MR2414A
Unit: ea
Vendor: PAI Industries
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting