Castle TSM-21 Serial 61076 to 64233 (Parker) Operator Manual User Manual
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Pressure Regulator
The Pressure Regulator determines the Drill Feed rate and overall speed of the machine. It’s
important that at least 80 PSI is going into the machine from the compressor. Other machines on
the same line as your Castle machine can affect this pressure.
IMPORTANT
Do not adjust the internal Pressure Regulator unless absolutely necessary.
The internal Pressure Regulator knob is located on the Control Box, just below the duplex power
outlet for the Router and Drill motors. (Figure 26) If in doubt whether the internal Pressure
Regulator is set correctly, follow the steps described below:
Unlock the knob by pulling it slightly away from the Control Box.
Turn the knob counter-clockwise until it reaches a mechanical stop.
Turn the knob clockwise five full revolutions (it’s helpful to make an index mark on the
knob as a reference.)
Lock the knob by pushing it slightly toward the Control Box.
Figure 26
IMPORTANT
Cycling too slow will burn drill bits and cause separation at the shank. Cycling too fast will
put too much pressure on the drill bits and cause them to break and/or cut over-size holes.
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