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MODEL 220
HYDRAULIC
IMPACT HAMMER
VI.
ELECTRICAL CIRCUITRY
E. ENGINE THROTTLE
The ENGINE THROTTLE switch is located on the remote pendant. With the diesel
engine running, the MAIN POWER switch ON and the REMOTE-LOCAL switch in
the REMOTE position, momentarily turning the ELECTRIC THROTTLE switch to
the FAST position will retract the motor driven throttle actuator and increase engine
RPM. Turning the ELECTRIC THROTTLE switch to SLOW will extend the motor
driven throttle actuator decrease engine RPM
F. TACHOMETER
The TACH SENDER generates an electrical pulse every time a flywheel gear tooth
passes this sensor. This high frequency signal is converted to a visual indication of
engine RPM by the TACHOMETER GAGE (TACH). The MAIN POWER switch
must be ON and the engine running for the TACH to function.
G. OTHER
With the MAIN POWER switch ON, if the temperature of the hydraulic oil is below
60°F(16°C), the TEMPERATURE SWITCH closes and the HYDRAULIC OIL COLD
light comes on. When the temperature of the hydraulic oil exceeds 60°F(16°C), the
TEMPERATURE SWITCH turns off the HYDRAULIC OIL COLD light.
VI-3
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