ANÁLISIS DE LA DEMANDA DE CÍTRICOS IMPORTADOS
2. INFORME ENTREVISTAS A IMPORTADORES Y A OTROS EXPERTOS EN SHANGHAI
The 320D-336D hydraulic excavator operator station has an updated look with a new color scheme. The cab post and rear of the cab have been changed to black while the counterweight design has been changed with an enlarged CAT®decal and distinctive styling.
The newly designed cab features improved visibility and operator comfort. Conveniently placed switches, gages, information display, and controls improve operator comfort, awareness, and efficiency. Frequently used switches have been relocated to improve accessibility.
A full color Liquid Crystal Display monitor provides vital operating and performance
information, alerts in text, in a simple, easy to navigate format. The monitor provides increased functionality for the operator.
For operator comfort, the new cab offers a fully adjustable air suspended seat with side-to-side shock absorption, which provides maximum operator comfort.
The fuse panel has been moved to the left side of the lunch box compartment and behind the operator's seat for easy access.
A 24-volt AM/FM radio, mounted in the right console, is standard. 28
Controls in the cab include the:
- left (1) and right (2) travel pedals - left (3) and right (4) travel pedal levers - straight travel pedal (5) (attachment)
- right joystick (6) to control the bucket and boom (SAE excavator pattern) - left joystick (7) to control the swing and stick (SAE excavator pattern)
The switch for one-touch low idle (AEC) is on the right joystick. The left joystick includes the horn switch.
If the machine is equipped with a magnet, the trigger switch on the front of the right joystick turns the magnet on, while the trigger switch on the front of the left joystick turns the magnet off.
The service hour meter (8) can be seen to the left of the attachment pedal. 29 1 2 3 4 5 6 7 8
The hydraulic activation lever (1) has been redesigned, however, the lever serves the same purpose as before.
With the lever in the down position (shown), the hydraulic activation solenoid is in the
de-activated position. No hydraulic functions are available with the lever in the down position. When the lever is moved to the up position the hydraulic activation solenoid is energized and pilot oil is available to operate the joysticks.
The ground level emergency engine shutoff switch (2) is located on the bottom of the seat mount. The shutoff switch will shut off the engine without having to climb into the cab. Once the shutoff switch is turned ON and then OFF, the key start switch must be cycled for the machine to operate again.
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All of the operator functions are incorporated into the right side of the operator's station. The functions are:
- engine speed dial switch (1) - key start switch (2)
- cigarette lighter (3) - soft switch panel (4) - rocker switches (5) - HVAC controls (6) - radio (7) 31 1 2 3 4 5 6 7
The soft switch panel includes switches that either turn a function ON/OFF or allows the operator to toggle through different modes of the selected function. The soft switches provide the operator with the following functions:
Two-speed travel switch (1): When the button is pushed the travel speed is toggled between low and auto.
- The rabbit indicator indicates auto speed. - The tortoise indicator indicates low speed.
Automatic Engine Control (AEC) switch (2): The AEC function automatically reduces engine speed while there is no hydraulic demand, which reduces noise and fuel consumption.
- The AEC switch disables and enables the AEC function.
- Initially, AEC reduces the engine speed by 100 rpm after there has been no hydraulic demand for approximately three seconds.
- Then AEC reduces the engine rpm to approximately 1300 rpm after there has been no hydraulic demand for an additional three seconds.
- The additional three second AEC delay time and the low speed of 1300 rpm can be changed using the monitor or Caterpillar Electronic Technician (Cat ET).
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Travel alarm cancel switch (3): The travel alarm cancel switch is a momentary two-position switch.
- The travel alarm sounds when travel is detected.
- The travel alarm stops immediately if the travel alarm cancel switch is depressed. - The travel alarm switch is reset every time the travel pressure switch opens.
Work tool switch (4): The work tool switch will show the selected work tool on the monitor display. Press the switch repeatedly to change the selected work tool. When the desired work tool is highlighted in the monitor display press the "OK" button on the monitor to select the work tool shown.
Work lights switch (5): The work lights switch toggles between the different work light combinations. Two different work light patterns are available.
- Pattern 1: Chassis work lights and cab work lights.
- Pattern 2: Chassis work lights, cab work lights, and boom work lights.
Upper window wipers switch(6): The wiper switch toggles between the following different modes of the wipers.
- six second delay. - three second delay. - continuous operation. - off
Upper window washer switch(7): The windshield washer fluid switch is an ON/OFF switch. Heavy lift mode switch (8): The Heavy lift mode switch can be selected to increase lifting capability and provide improved controlability of heavy loads.
- When heavy lift is turned on, the main relief valve maximum pressure increases from 35,000 MPa (5080 psi) to 36,000 MPa (5225 psi), making it possible to operate the system at a higher pressure.
- In Heavy Lift Mode, the maximum engine speed is limited to engine speed dial 6 (1510 ± 90 rpm).
The toggle and rocker switch panel contains switches that control additional functions: Quick coupler lock control switch (1): The quick coupler lock control switch is a spring centered toggle switch.
- The top position locks the quick coupler. - The bottom position unlocks the quick coupler.
Fine swing control switch(2): The fine swing control switch is a two-position rocker switch. - The top position activates fine swing control. Fine swing control improves the swing
control during swing deceleration.
- The bottom position deactivates fine swing control.
Rear window washer switch (3): The rear window washer fluid switch is a two-position rocker switch.
- The top position activates the windshield washer fluid. - The bottom position deactivates the windshield washer fluid.
Rear window wiper (4): The rear window wiper switch is a two-position rocker switch. - The top position activates the wiper.
- The bottom position deactivates the wiper. 33
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The heating and air conditioning system (HVAC) is electronically controlled. The control panel for the heating and air conditioning system is located on the right console. The switches on the control panel are:
ON/OFF switch (1): Push the ON/OFF switch in order to power on the system. Push the switch again in order to power off the system.
Automatic control switch (2): In order to enter the full "AUT" Mode for automatic climate control, push this switch. However, if the switch is pushed again, the air conditioning can not be turned off using this switch. When the system is in full "AUT" Mode, specific functions can be manually changed by pushing another switch.
If a specific function is manually changed, "AUT" will not appear in the display, but the unchanged functions will remain in "AUT" mode.
In order to take advantage of the full "AUT" setting of the climate control system, always keep the sunlight sensor clean. Do not obstruct the sunlight sensor. If the climate control system is in the full "AUT" setting at engine start-up and the temperature inside the cab is too warm or too cool, the damper for fresh air ventilation may automatically close for a few minutes. This action will help to bring the air temperature to the preset temperature more quickly.
NOTE: "AUT" represents "auto".
Temperature switch (3): This switch controls the temperature of the air entering from the air outlets in order to achieve the preset temperature. The preset temperature appears on display. If the heating and air conditioning system is in the automatic mode, pushing these switches changes the preset temperature.
LCD panel (4): The panel displays the settings of the HVAC system.
Fan switch (5): The fan switch directly controls the fan speed. If the climate control system is operating in the automatic mode, pushing this switch overrides the automatically selected fan speed.
Compressor switch (6): Push the switch in order to turn on the compressor or push the switch in order to turn off the compressor. In humid conditions, the compressor may be used to remove moisture from the air in the cab. In cool weather, operate the compressor weekly in order to prevent leakage of the refrigerant gas and to help maintain the compressor in optimum working order.
Defrost mode switch (7): Depressing this switch will defog the windows. The air will also be dehumidified while the compressor is running.
Air inlet select switch (8): This switch selects the position of the air inlet for recirculation or for fresh air.
Air outlet select switch (9): This switch selects the position of each air outlet. Each switch controls a different air outlet.
- upper body switch
- upper body and floor switch - floor switch
- floor and defroster switch
NOTE: In order to convert the temperature reading from Degrees Celsius to Degrees
Fahrenheit, depress both keys of the fan switch at the same time for five seconds. This same action is used for converting the temperature reading from Degrees Fahrenheit to Degrees Celsius.
The backup switches are located behind the right armrest. The engine speed selector switch (1) (closest to the right console) controls the engine rpm. The main backup switch (2) toggles between Manual Mode and Auto Mode. The backup switches are used whenever the Machine ECM malfunction to allow limited mobility of the machine.
In the Manual Mode, the Monitoring System will display the message "LIMITED MOBILITY MODE" and the Monitoring System will sound the action alarm.
The main backup switch activates or deactivates the Manual Mode. When Manual Mode is active, the Machine ECM is bypassed and a fixed power shift pressure is provided to the main hydraulic pumps. The fixed power shift pressure limits maximum pump output and allows the machine to continue operating in a Derate Mode. Machine productivity will be limited while the machine is in the Manual Mode.
In the Manuall Mode, the AEC switch and the low idle switch will not function.
The engine speed switch is used to control the engine speed while the Manual Mode is active. Holding the engine speed switch in the DOWN position decreases the engine rpm. Holding the engine speed switch in the UP position increases the engine rpm.
When the switch is released the switch returns to the NEUTRAL position and the machine will maintain the engine speed. This switch overrides the function of the engine speed dial.
The diagnostic connector (3) is located inside of the operator's station behind the right armrest, beside the back-up switches. The connector is used to connect the machine to Cat Electronic Technician.
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The fuse panel (1) has been relocated to the left side of the lunch box panel behind the operator's seat.
Some of the relays (2) are also part of the fuse panel.
A decal (3) on the cover identifies the circuit for each fuse or relay. 36
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The 300D monitor has been updated. The new monitor is used on the 308D, 311D, 312D, 314D,3 315D, 319D, 320D, 321D, 323D, 324D, 325D/329D, 328D, 330D/336D, 345C, 365C, and the 385C hydraulic excavators.
The monitor is a full color Liquid Crystal Display (LCD) that displays the various parameters of the machine. Shown above are the:
- alert indicator (1) - clock (2)
- fuel gage (3)
- hydraulic oil temperature gage (4) - engine speed dial indicator (5) - engine coolant temperature gage (6) - operating hours (7)
- work tool indicator (8)
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The monitor uses eight buttons to control navigation on the monitor screen. The four directional buttons are:
- left (1) - up (2) - down (3) - right (4)
The directional buttons navigate the cursor through the various screens. The four navigational buttons are:
- home (5) - menu (6) - back (7) - OK (8) 38 1 2 3 4 5 6 7 8
Cat ET or the monitoring system can be used for testing and calibrating the machine. Extended fluid change intervals are available with the proper S•O•S procedures. Maintenance intervals for several components and systems on the machine are programmed into the monitor. The operator can access component maintenance intervals to see the hours remaining before maintenance is due. Some of the maintenance items are:
- hydraulic oil and hydraulic oil filter changes - swing drive oil change
- travel drive oil change
- engine oil and engine oil filter changes
NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C
Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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The illustration above shows the display setup for the 300D Series excavators.
NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C
Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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