Castle TSM-21 Serial 61076 to 64233 (Parker) Operator Manual - Manual (Page 31)

Foot Switch
Designed to work in series with the Safety Switch, the Foot Switch is a simple mechanical
micro-switch operated by a spring-loaded pedal. At rest the switch condition should be normally
open. Closing the switch begins the cycle.
ƒ Turn the power to the machine off.
ƒ Turn the Foot Pedal and guard over and remove the two small screws that hold the pedal
to the base.
ƒ Use a flat tip screwdriver to pry the pedal free from the yellow guard (it is held by a
silicone caulk).
ƒ Using a flat or phillips screw driver, remove the two screws on the left and right side of
the pedal. This will allow the pedal to come apart exposing the switch underneath.
ƒ Use two leads of the ohmmeter to probe the wire terminals while the switch is still in the
pedal. (Figure 25)
Figure 25
ƒ Without depressing the spring plate, the switch should register as an open circuit. When
depressing the plate, the switch should register as a closed circuit (approximately 0
ohms).
ƒ If an open circuit is still registered, then a new switch should be installed.
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