5.19.2 OPTIONAL STEPS:
Sometimes an air leak may be more noticeable during the Drill stroke.
7. Un-plug or turn off only the Drill motor.
8. Connect power and air to the machine, and turn the Power Switch ON.
9. Place a piece of scrap wood against the Safety Buttons and depress the Foot Pedal in
order to start a normal cycle. The router will cut a normal pocket, but will stall during the
Drill stroke.
10. Leave the Power Switch ON. Now un-plug or turn off the Router motor.
11. Listen for constant hissing and feel for leaking air at the exhaust ports of the Router and
the Drill Solenoids. See Fig 20a.
12. Cycle the machine a few more times to see if the situation can be repeated.
13. If the stalled Drive Cylinder consistently leaks air, the cylinder must be replaced.
TSM-21 Diagnostic Manual Parker/Humphrey Solenoids
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