American Hakko Products Desoldering Tool 472D

Remove the pump head from each side of the pump

Remove the valve plate and fixing plate

Clean the inside of the filter case

Inspect and replace the ceramic paper filter (S) if necessary

Insert the small ceramic paper filter into the filter retainer at the station

Turn off the power switch and disconnect the power plug before performing any maintenance procedure.

Plug in the power cord and turn the power switch 'ON' to heat up the nozzle.

Clean out the hole of the nozzle with the nozzle cleaning pin.

Did the nozzle cleaning pin pass through the nozzle?

Use the cleaning drill if the nozzle cleaning pin does not pass through.

Is the solder inside the nozzle completely melted?

Turn the back holder knob counterclockwise

Filter Inspection and Replacement

Is there solder in two-thirds of the spring filter?

Replace the spring filter if necessary

Is the ceramic paper filter stiff with flux and solder?

Replace the ceramic paper filter if necessary

Measure resistance between pins 1 and 3 (heating element)

Measure resistance between pins 2 and 4 (sensor)

Are the resistance values within the normal range?

Remove the nut, element cover, and nozzle

Turn the back holder knob counterclockwise and pull out the filter pipe