Radio Shack 20W Soldering Starter Kit User Manual page 10

Using the Desoldering Pump
1. Push down the
desoldering tool
plunger until the
cleaning shaft
protrudes from the tip.
2. Heat the bridge with
soldering iron until
solder melts and
becomes liquid.
3. Hold the pump lightly
to the melted
solder and
press the
trigger button
to vacuum
solder from the
connection.
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