ToughTek F680e Troubleshooting Advice

Frequently Asked Questions

  • Tighten packing nut.
  • Replace piston packings and piston if necessary.
  • Service the intake valve ball check.
  • Tighten clamps on the rubber elbow.
  • Clean the fluid hose on the applicator.
  • Use a hose with a larger ID.
  • Tighten the wet cup enough to stop leakage.
  • Replace the throat packings.
  • Increase the pressure.
  • Tighten clamps on the hopper elbow.
  • Bring the sprayer to a Graco distributor for repair.
  • Reduce length or increase diameter.
  • Turn the sprayer OFF and add hydraulic fluid.
  • Verify the pump control switch setting.
  • Verify the remote switch position.
  • If the solenoid is not receiving a signal and remains closed when the pump control switch is in the ON position, it can be manually overridden. 
    • To override, push the red button in, turn counterclockwise 180°, and release. 
    • The solenoid valve will remain open at all times.
  • Clean the hose or application.
  • Clean rod. Always stop pump at bottom of stroke; keep wet cup filled with TSL. 
  • Be sure the inlet ball moves freely.
  • Verify that the ball valve is in the open position.
  • Refill the hopper and the prime pump.
  • Clear piston valve. 
  • Service the piston ball check.
  • Replace packings.
  • Clear or service intake valve.
  • Adjust air needle valve on applicator (see applicator manual).
  • Service spray applicator (see applicator manual).
  • Disassemble and Clean the pump.
  • Try to flush the hose using water hose and/or polyurethane tube.
  • Install the outlet check valve in the proper orientation.
  • Thin and mix material thoroughly to a lower viscosity.
  • Use a pump system priming fluid (slime). Wet out the system.
  • Use a larger diameter hose.
  • Check dipstick to ensure that hydraulic reservoir is properly filled.
  • Make sure the hydraulic pump inlet fitting is fully tight, to ensure no air is leaking into the hydraulic pump inlet.
  • To prime pump: 
    • Run unit at lowest pressure setting and slowly increase pressure. 
    • In some cases it may be necessary to remove cover shroud, belt guard, and drive belt to allow for manual (counterclockwise) rotation of hydraulic pump. 
    • Turn fan pulley by hand. Verify oil flow by removing oil filter to see flow into filter manifold. 
    • Reinstall oil filter. 
    • Do NOT operate unit without a properly installed oil filter.
  • If noise continues longer than 30 seconds, turn off main power disconnect to shut off the motor. 
  • Check that the hydraulic pump inlet fittings are tight and that the pump has not lost its prime.
  • Ensure that the reservoir is properly serviced. 
  • Improve ventilation to allow more efficient heat dissipation.
  • Check drive belt condition. 
  • Replace if broken.
  • Check connections in electrical enclosure. 
  • Check for 200–240 VAC at input of motor contactor.
  • Reset breaker inside the electrical control box.
  • Wait for the motor to cool, then restart the motor.
  • Verify that the air hoses, fittings, and cooling tube on the machine are free of debris. 
  • Also, verify that the air relief valve (part 17H606) and muffler (part 120206) are clean and free of debris.
  • Verify that the air hoses, fittings, and cooling tube on the machine are free of debris. 
  • Also, verify that the air relief valve (part 17H606) and muffler (part 120206) are clean and free of debris.
  • Wait for the motor to cool, then restart the motor.
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