I-2 / I-3 Valve Preliminary Adjustments
August 2019 - 89130 v.3.0 11
Relief Pressure Adjustment
Stop the power unit immediately if the pressure exceeds 625 PSI.
1. Close the line shut-off valve, and install a pressure gauge.
2. Place the controller on Inspection Operation.
3. Turn the power ON, start the motor, and read the pressure.
4. Adjust the relief valve to relieve at the pressure indicated on the power unit nameplate.
See Figure 4.
5. Tighten the locknut.
6. Turn OFF, Lockout, and Tagout the mainline disconnect.
7. Open the manual lowering valve to relieve the jack pressure.
8. Close the manual lowering valve.
Figure 4 - Relief Pressure Adjustment
9. Turn the power ON, and recheck the relief pressure.
10. Turn OFF, Lockout, and Tagout the mainline disconnect.
11. Repeat steps 7 and 8.
12. Open the line shut-off valve.
Relief Pressure Valve:
IN (CW) =
Increases Relief
Pressure
OUT (CCW) =
Decreases Relief
Pressure
Manual
Lowering
Valve
Relief
Pressure
Valve
Power Unit
Nameplate
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