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Adjusting the Maxton UC-4/4M

The Maxton UC-4 or UC-4M (mirrored layouts) have similar instructions to several other valves. However, the adjuster locations are unique. View the information page for your exact valve to quickly identify the features:

Your valve is basically pre-adjusted. Please do not go to factory pre-sets!

1. Watch Getting Started Video

2. Bypass Adjustment

  • Start pump, making sure that NO solenoid coils are energized
  • Turn the BPS adjustment in (clockwise) until the car just begins to move
  • Next, turn the BPS adjustment out (counter-clockwise) until the car stops, then out a half turn more, and stop the pump

3. Operating Adjustments

  • Make normal runs up and down, making minor adjustments as necessary to attain the desired operation

4. Pressure Relief Setting

  • Install pressure gauge
  • Determine operating pressure with fully loaded car
  • Close pit valve
  • Back out pressure relief adjustment
  • Register an up call and adjust pressure according to local code, but not more than 25% higher than loaded operating pressure

5. Call For Assistance

We are happy to help you get the valve adjusted. Please call us at 208-754-4884 if you have any issues.