1. Remove the existing T-Handle from the cover of the RACOR filter
2. Replace the filter with a new one
3. Replace the cover O-Ring (supplied with new filter)
4. Press reset button on top of R2D2 T-handle gauge
5. Re-Install cover with R2D2 T-Handle Gauge
6. Hand tighten R2D2 using T-Handle ( no tools needed )
7. Done.

The button on the top of the R2D2 resets the YELLOW disk inside the R2D2. The reset should be pushed after changing the filter.
The gauge will automatically show the contamination level of the filter once the engine is restarted.

WHEN THE YELLOW INDICATOR INSIDE THE R2D2 UNIT IS AT THE BOTTOM OF THE GREEN AREA, CHANGE YOUR FILTER AND PUSH THE RESET BUTTON AT THE TOP OF THE R2D2. DO NOT WAIT FOR IT TO BE IN THE RED.

Click here for R2D2 Gauge Questions Answered

• The R2D1 can be used to monitor the condition of any Fuel Filtration system where the Filter is on the vacuum side of the pump.
• NEVER install on the pressure side of the pump; the gauge will not work !
• R2D1 is compatible with diesel, kerosene, and bio-diesel. Not for use with gas.
• ALWAYS use a fuel compatible thread sealant, such as Real-Tuff Teflon paste thread sealant. This will cover most applications BUT always check to make sure it is compatible with your application.
  
• ALWAYS use high quality Brass fittings when adapting the unit to your specific application.
• The thread is 1/8” n.p.t. (national pipe thread) and can be adapted to larger or smaller thread when needed without affecting the operation of the gauge.
• The R2D1 can be installed directly on the filter if there is an available port on the vacuum side. If the filter thread is not 1/8” female n.p.t. you can use larger or smaller adapters to fit your specific application.
• The R2D1 can also be T’d into the vacuum side a fuel line, between the filter and the pump. Simply use a brass T with 1/8” N.P.T. female threads.