Description

When the AC in your cab stops working on a hot summer day, you know how miserable the next few hours can be. This hi-lo pressure switch is an essential component that ensures reliable operation of your tractor’s HVAC system, monitoring refrigerant pressure levels to protect your air conditioning system from damage. It’s the kind of part that works quietly in the background until it doesn’t—then you really notice.

What You’re Getting

Trinary design monitors both high and low pressure conditions in your AC system
Normally open electrical contacts that close when pressure levels are within proper operating range
Male thread connection for secure installation in your refrigerant line
Built to handle the pressure cycling and temperature extremes of farm equipment AC systems

Built for Real Farm Work

This switch is designed specifically for Allis Chalmers cab tractors including the 6260 Star Cab, 6265 Star Cab, 6275, 6670, and the bigger machines like the 7085, 7110, 7120, and 7145. These are the workhorses that spend long days in dusty fields where a functioning cab AC isn’t just comfort—it’s about staying alert and productive when the mercury climbs.

Made to Last

This switch is built to handle the demanding conditions farm equipment faces, including temperature extremes and pressure changes without breaking down. The electrical contacts are designed for thousands of switching cycles, and the housing protects against moisture and contamination that can cause premature failure.

Good to Know

Installation involves threading the switch into your AC system’s pressure port—make sure to use proper thread sealant rated for refrigerant systems. Before replacing the switch, check for leaks in your system since adding more refrigerant won’t help if it’s just going to leak right back out. If you’re not comfortable working with AC systems, this is a good job for your local equipment dealer who has the proper tools and refrigerant recovery equipment.