5.17 Unclogging the Drill Solenoid 21.50
1. Disconnect power from the machine. Open the rear door.
2. Remove the air out line and the exhaust muffler from the Drill solenoid and press
the override button for several seconds to flush the solenoid. Air should flow through the
solenoid. Press the override switch several more times for several seconds to throughly
flush the solenoid. See Fig 18a and Fig 18b.
Note: All Solenoid Air Fittings are "Push In" connections. To remove an air line, push in
the plastic or metal rim of the fitting and pull the air line out. To re-install, push the air line
in until it meets resistance and then push in another 1/2".
Fig 18b
TSM-21 Diagnostic Manual Parker/Humphrey Solenoids
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