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4.2 Electrical Components
4.2.1 Hydraulic Pump Motor
This motor is coupled to the hydraulic pump via flexible shaft coupling and a pump adapter that bolts to the motor.
The motor runs at fixed speed of ~1800 RPM. A label is located on the pump mount designating the correct direction
of rotation (reference Figure 1-1). Verify that the motor is turning the proper direction of rotation when wiring the
system.
NOTE: DO NOT RUN THE MOTOR THE WRONG DIRECTION. DAMAGE TO THE HYDRAULIC PUMP WILL
RESULT.
4.2.2 Pump Motor Starter & Thermal Overload
The motor starter makes and breaks the power to the hydraulic pump motor. The motor is protected with a set of
overload heaters, that sense the motor current and trip if and overload occurs. If the overload trips, it will be
necessary to determine the cause and manually reset the overload module inside the starter enclosure.
4.2.3 Hydraulic Oil Heater
The immersion heater is mounted in the side of the oil reservoir to heat the oil to a suitable operating temperature.
The heater is rated at 500 watts and has in internal thermostat to shut it off at when the oil has been heated. The
thermostat should be set at 90 degrees F.
4.2.4 Vacuum Motor
The vacuum motor(s) are used to create suction at the probe tip to convey the sample to the collection cabinet. The
vacuum motor(s) are turned on during the probing of a truck and must be turned off to retrieve the sample from the
collection cabinet.
NOTE: SHUT THE VACUUM SYSTEM OFF WHEN EMPTYING THE COLLECTION CABINET. FAILURE TO
DO SO MAY RESULT MECHANICAL DAMAGE TO THE VACUUM MOTOR(S) AND WILL LIKELY PROVIDE A
BIASED SAMPLE.
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