Tag: maintenance

General Engine Maintenance

Regular maintenance on an HPA engine should be performed every 25-50k rounds depending on the conditions it is being used in. The dustier and dirtier the conditions, the more frequently it should be serviced. Maintaining the INFERNO requires disassembling the engine and lubricating/cleaning/replacing the O-Rings.

For detailed instructions, please see the Owner’s Manual for your engine.

For detailed instructions on the solenoid, please see the Solenoid Maintenance Guide.

Spartan Electronics for MTW-Spec Optical Sensor Cleaning

If the optical select-fire sensor on the MTW Spartan Electronics Control Board is giving inconsistent results, it may be necessary to clean the contacts on the board. After removing the electronics from your MTW, remove the electrical tape from the back of the board to reveal the sensor contacts. Clean them thoroughly with 70% or better isopropyl alcohol. After allowing the contacts to dry, re-apply the electrical tape and reinstall the board in your MTW.

For instructions on removing/installing the control board, see this video.

Troubleshooting INFERNO/Reaper Air Leaks

If your INFERNO Gen 2 is leaking, use this diagram to determine which O-ring may be faulty. For example, if your engine is leaking from around the nozzle, you should check the location and condition of O-ring #4.

For instructions in replacing an O-ring, please see the INFERNO Gen 2 Owner’s Manual.

If your INFERNO Gen 2 is leaking, use this diagram to determine which O-ring may be faulty. For example, if your engine is leaking from around the nozzle, you should check the location and condition of O-ring #4.

For instructions in replacing an O-ring, please see the INFERNO Gen 2 Owner’s Manual.

Cylinder Plugs

The cylinder plugs are part of the manufacturing process and are not adjustable or removable. Never attempt to remove or adjust the cylinder plugs. Doing so will cause leaking and engine malfunction. Already done it? Follow these steps…

  1. Remove the valve from the engine.
  2. Clean the threads of the plug(s) and valve housing thoroughly with acetone or fingernail polish remover and a sharp tool like an O-ring pick.
  3. Apply a small amount of black Vibra-Tite super glue or Loctite to the cylinder plug(s) threads and work it completely around the threads.
  4. Reinstall the cylinder plug(s) flush with the outside of the valve housing. DO NOT screw the plug in all the way as it may damage the valve.
  5. Allow to dry for at least one hour.
  6. Attach an air source and ensure an air-tight seal.

Airflow Animation

See also: Solenoid Leaks