Castle TSM-21 Diagnostic Manual - Manual (Page 41)

Castle Inc TSM-21 Diagnostic Manual v2 Page 41 of 63
3.
Attach the air supply to the machine and see if the router now extends instead of the drill.
If it does then the Drill Solenoid has stuck open.
4.
Swap the air lines back again.
5. Perform procedure 21.50 – “Unclogging the Drill Solenoid” .
5.19 Drive Cylinder Check 21.60
The Drive Cylinder provides the forward and back stroke to the Motor Carriage for the Router
and Pilot Drill phases. If the cylinder fails or if the air lines become clogged, the machine may
not complete one or both of these phases. Occasionally the cylinder seal may need to be
reseated. Do this by rocking the carriage back and fourth by hand through the rear door. It is
normal to detect a “puff” of air at the Drive Cylinder mounted SQE (Super Quick Exhaust) valves
when rocking the carriage.
Machines with Serial numbers after 62480, do not have SQE valves, therefore, it is normal to de-
tect a “puff” of air at the exhaust ports of the Router and Drill Solenoids when manually rocking the
carriage.
5.19.1 TO DETECT A BAD CYLINDER SEAL:
If the cylinder seal is dry, damaged, or not seated properly, air may bypass the cylinder piston
and constantly exhaust out the SQE on the opposite end of the cylinder (often accompanied by
an audible hissing sound).
Note: Machines with Serial numbers after 62480 do not have SQE valves, Inspect for leak-
ing air at the exhaust ports of the Router and Drill Solenoids.
1.
Un-plug or turn off both routers.
2. Connect power and air to the machine, and turn the Power Switch ON.
3.
Place a piece of scrap wood against the Safety Buttons and depress the Foot Pedal to
induce a stall during the router stroke.
4. Listen for constant hissing and feel for leaking air at the open barbs on the SQE valves
(or at the exhaust ports of the Rout Solenoid and the Drill Solenoid). See Fig 21.