Johnson Controls T-4000-119 Tool

For service technicians managing legacy pneumatic systems, the Johnson Controls T-4000-119 is the standard Allen head adjustment tool required for the precise calibration and maintenance of T-4000 series pneumatic thermostats. This specialized tool features a hardened Allen head tip specifically machined to engage with the setpoint adjustment screws and cover mounting hardware on Johnson Controls pneumatic controllers. Unlike standard hardware store wrenches, this tool?s slim profile and integrated pocket clip allow for rapid field adjustments of branch pressure and sensitivity without damaging the delicate internal bimetal elements or plastic housings of the room thermostat module.

The T-4000-119 pneumatic tool is essential for HVAC calibration tasks, including setting day/night setpoints, adjusting throttling ranges on high-volume output thermostats, and removing covers for internal inspections. Its blue plastic handle provides high visibility in mechanical rooms, while the precision-ground tip ensures a snug fit on the #4-40 hex screws commonly found in HVACR pneumatic systems. Integrating this thermostat adjustment wrench into your service kit prevents the rounding of setpoint screws and ensures the long-term reliability of commercial pneumatic temperature control equipment.

• Universal Compatibility: Engineered specifically for the entire Johnson Controls T-4000 series, including direct and reverse acting models.
• Precision Calibration: Facilitates micro-adjustments to the calibration screw to reach the exact mid-spring range of controlled actuators.
• Field Ready: Includes a durable pocket clip for easy access and a high-visibility blue finish to prevent tool loss on the job site.
• Component Protection: Properly sized Allen head prevents over-torquing and stripping of sensitive pneumatic thermostat components.

Can I use this tool on other pneumatic brands?
While designed for Johnson Controls T-4000 hardware, the hex size may fit other #4-40 set screws; however, dedicated tools are recommended for Robertshaw or Honeywell systems to ensure proper depth and torque.

Is this used for sensitivity or setpoint changes?
Both. The T-4000-119 is utilized to adjust the setpoint dial and, on many models, to access the internal sensitivity slider or calibration port screws for HVACR maintenance.

Does this tool work with tamper-proof thermostats?
No, this is a standard Allen head tool. For T-4000 series units equipped with specialized security screws, a Torx tamper-proof driver (such as the T-4000-629) is required.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.