Castle TSM-21 Serial 61064 and lower (Mead) Operator Manual - Manual (Page 25)

Air Pressure
Solution One Steps:
Figure 19
The drill solenoid is an air switch that controls the flow of air to the drive cylinder. (Figure 19)
The drive cylinder, in turn, provides the pressure to move the carriage (with the drill attached)
through the cutting part of the cycle. If the air line becomes blocked the drive cylinder won't
have enough pressure to pull the drill all the way (or potentially any of the way) through it's
stroke. To clear the drive cylinder lines from any potential debris, follow these steps.
ƒ Open the back door of the machine. Inspect the hoses coming from the drive cylinder for
holes and/or pinches.
ƒ Unplug these two drive cylinder hoses from the rout and drill solenoids. This is done by
pressing on the push-in fitting rings where the hoses go into the solenoid. The space is
tight for large fingers so you may need to use a pair of needle-nosed pliers to get in there
to press the rings. The hoses should remain attached to the drive cylinder at the cylinder
SQEs.
ƒ Next, you will need to dry cycle the machine. To do this, first turn off the power
switches at the router motors. Next, hold in one safety button with a scrap of wood,
being careful to leave room for the router to come up.
ƒ Press the foot pedal.
ƒ Reach into the rear door opening and firmly grasp the yellow carriage. Steadily pull and
then push the carriage fully back and then forth to force air through the hoses. It's
important to allow the pressure generated to fully exhaust out the hoses.
ƒ Make sure air is coming out of the solenoid while dry cycling.
ƒ This should kick any blockage out of the brass SQEs where the hoses attach to the
cylinder, as well as clearing any potential debris out of the hoses.
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