Take care when you drive into the loading area. Maintain a safe distance from the machine in front of your machine.
Avoid hitting sharp rocks and overflow.
Park the machine on level ground.
Note: Keep the hoist control in the FLOAT position during the loading of the machine. Also, keep the hoist control in the FLOAT position when the machine travels.
The operator of the machine should stay in the cab while the truck is being loaded.
Note: Do not load any material on the canopy of the body.
- Make sure that the switch (1) for the Truck Payload Measurement System (TPMS) is ON. The TPMS calculates the weight of the material that is being loaded into the truck.
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Illustration 2 g00634648 - Use the service brake pedal (2) in order to stop the machine.
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Illustration 3 g00860215 Note: Make sure that parking brake reset valve (3) is depressed.
- Move transmission direction and speed control lever (5) to the NEUTRAL position. Move parking brake switch (4) to the ON position.
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| Illustration 1 | g00634651 |
Note: Do not dump the first load into the truck before the truck has stopped and the transmission is in the NEUTRAL position. Loading the truck too soon may affect the accuracy of the payload weight.
Note: Do not put the machine in gear before the last load has been recorded on the display. This may affect the accuracy of the payload weight.
Note: The truck can be repositioned during loading. If the truck moves more than
The TPMS measures the load by using the pressures of the suspension cylinders. The green lights that are located on the side of the machine will activate. Also, the green light on the payload operator display will activate and the weight will be displayed.
The truck may bounce during loading which will delay the display of the payload.
The display will show no weight until the suspension cylinder pressures stabilize and the truck is full enough to get an accurate weight.
When the TPMS determines that 95 percent of the target weight will be achieved with another bucket load, the red lights that are located on the side of the machine will begin to flash. When the payload weight reaches 95 percent or more of the target weight, the red lights will stay on continuously and the payload operator display will display "FULLY LOADED".
The external red lights go off and the final payload weight is held on the display when the truck has moved more than
Refer to Service Manual, SENR4733, "Truck Payload Measurement System (with Real Time Clock)" for additional information.
- Do not load the machine on a surface that has a slope of more than 5%.
- The information may not be accurate if the suspension cylinders are not properly charged.
- Do not allow the operator of the loader to press with the loader bucket on top of the last load.
- Do not move the truck more than
160 m (525 ft) while the truck is being loaded. - Do not move the hoist control while the truck is being loaded.
- Calibrate the TPMS after components are replaced. Calibrate the TPMS after substantial changes are made to the empty weight of the truck. There is a substantial change in weight when wear plates are added to the body.
- The information will not be accurate if the truck is loaded with a conveyor. If the truck is loaded with a continuous feed system, the information will not be accurate. These systems do not provide an abrupt increase in the pressure of the suspension cylinders. The abrupt increase of the pressure of the suspension cylinders causes the TPMS to begin the loading cycle.
- Do not move away from the loading site before the pressures of the suspension cylinders have stabilized. Do not move away from the loading site before the message center displays the final weight.
- Do not ignore fault codes.
Pay attention to your surroundings. Keep a safe distance from any machines in front of your machine.
Do not drive over unprotected power cables. Do not drive under low power cables.
Know the maximum height of the machine. Know the maximum width of the machine. Maintain proper clearances.
When you are on a downgrade, the repeated, intermittent application of the service brake control or of the manual retarder lever can reduce the air pressure. This can cause the air pressure to drop below the operating pressure.
Note: The manual retarder lever should not be used to park the machine.
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| Illustration 4 | g00615954 |
When you approach a downgrade that is long or steep, switch (1) for the automatic retarder control (ARC) should be in the ON position. When you drive down a grade, use the same gear range that is used for driving up a grade when the machine is loaded. The transmission direction and speed control lever should be in the desired gear before you start the downgrade. The actual gear of the transmission should also match the selected gear before you start the downgrade.
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| Illustration 5 | g00616387 |
If the machine builds up excessive speed, use the retarder control lever (2) in order to reduce the ground speed. If additional braking is needed, use the service brake pedal. This adds more brake force when the front brake control lever is in the ON position.
Note: Both the service brake pedal and the retarder control lever can apply complete rear wheel braking. The service brake pedal may also apply the front brakes in order to allow more braking effort. However, the front brake control lever must be in the ON position in order for the service brake pedal to apply the front brakes.
If the machine continues to build up excessive speed, use the retarder control lever in order to reduce the engine speed. If the engine continues to overspeed, continue to increase the transmission speed until the engine speed is reduced. When the machine slows, the transmission speed will downshift to the original gear.
Note: If the engine reaches 2300 rpm and the transmission is in the same gear as the transmission direction and speed control lever, the transmission will upshift one gear. If the transmission is in the top gear, the torque converter lockup clutch will disengage.
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Do not shift into the NEUTRAL position and do not freewheel down a grade. If the brake oil temperature gauge enters the red range, reduce the travel speed or stop the machine until the oil cools. This will prevent damage to the brake components. |
Always travel with the hoist control lever in the FLOAT position. Shift to the top speed that is anticipated. All further shifts will be automatic.
During normal operation, use the service brake pedal for all normal braking.
Roads can be slick from ice or from snow. Also, roads can be slick from being wet. Reduce the speed of the machine in order to compensate for poor ground conditions.
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Personal injury or death can occur when backing the machine over soft edges. Use care when backing into the dump area. Stay clear of soft edges that could collapse under the machine. If the load is frozen in the machine bed and dumping is attempted on a slope, the machine can tip over causing personal injury or death. |
Before you move the hoist lever to the OPEN position, make sure that the machine is at the location to dump. Also, engage the parking brake and move the transmission direction and speed control lever to the NEUTRAL position.
Be certain that no personnel are near the dump area.
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| Illustration 6 | g00634555 |
The machine will not shift into the REVERSE position while the pulled unit is being opened or the hoist control lever (1) is in the OPEN position or in the CLOSE position.
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| Illustration 7 | g00634781 |
Note: If the parking brake switch (2) is not engaged or if the service brake pedal is not applied, the machine may roll backward.
The transmission direction and speed control will shift into the NEUTRAL position if both of the following situations are true:
- The transmission direction and speed control is in the REVERSE position.
- Hoist control lever (1) is moved to the OPEN position or to the CLOSE position.
If the machine is on a slope, apply the service brake pedal in order to stop the machine from moving.
The reverse neutralizer has no effect on the forward gears. If the situation is required, the forward gears can be engaged from the NEUTRAL position or the REVERSE position.