Red Jacket STP Hydraulic Troubleshooting

In order to successfully troubleshoot the hydraulic system of the Red Jacket PMA you will need to have a pressure gauge. 

1.  With the power removed via lockout/tagout close the product line ball valve to isolate the line.
2. Turn the check valve service screw clockwise to relieve pressure from the PMA (packer manifold assembly) continue until the screw is fully depressed. Back off the screw 4 turns to lift the check valve and let fuel drain from the manifold's cavities. 
    
3. Locate the line port on the PMA, remove the 1/4" plug and install your line gauge making sure to use thread sealant. 

4. Turn the check valve service screw counterclockwise until you hear the check valve drop back into place. You are now ready to activate the motor and begin pressure checks. Open the air purge screw and activate the motor. Let the motor run 3-4 minutes before closing the air purge screw. This will vent all PMA air back into the tank.
    
   • Lockdown the check valve and turn on the motor. Note the pressure reading. Turn off the motor and wait 60 seconds. Record the new PSI. If there is a greater than 2 PSI loss you will need to replace the O-rings on the air purge screw.
   • If there is no pressure loss, place the check valve back into operation by unscrewing the service screw until you hear the check valve release and drop. Test again. If there is a greater than 2 PSI loss, replace the check valve. 
   • Wait an additional 15-minutes pressure should have dropped to around 18 PSI. If pressure drops below 18 PSI the check valve will need to be replaced. 
      
   • If there is no pressure loss AND the relief pressure is between 18-25 PSI your PMA is functioning properly.
      
5. Remove the pressure gauge, by closing the discharge ball valve and screwing down the service screw to relieve PMA pressure. Once completed remove the pressure gauge from the PMA, open the air purge screw three turns and apply power to the motor. Allow the motor to run 2-3 minutes to purge air from the PMA.
    
6. Screw down the air purge screw and place the check valve back in service.