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The instability of the machine can result in injury or death. In order to ensure the stability during operation, the following conditions must be observed. The tires must be inflated correctly and the tires must have the correct amount of ballast (if equipped). The machine must be level. The correct load chart must be referenced for the work tool that is installed on the machine. The specified weights and load centers must never be exceeded. The machine must never be moved when the boom is raised above the travelling position. |
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| Illustration 1 | g00905153 |
Location of the Machine Load Capacity Charts on Type 1 machines | |
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| Illustration 2 | g01121250 |
Location of the Machine Load Capacity Charts on Type 2 machines | |
On Type 1 machines, the load charts are located on the right side window. On Type 2 machines, the load charts are located on the dash panel near the steering column. Ensure that the correct load chart is used. The load charts may be in metric units (meters and kilograms) or conventional units (feet and pounds).
Note: The weight of the intended load should always be known before the load is picked up. When the machine is equipped with forks, the center of gravity of the load should not be more than 500 mm (20 inch) in front of the fork uprights.
Note: Both rear tires on Type 1 TH215 machines must contain liquid ballast for safe handling. The correct amount of liquid ballast must be installed in order to ensure that the rated load carrying capacity can be met. Refer to Operation and Maintenance Manual, "Tire Ballast" for more information regarding tire ballast.
When the machine is performing a lift, always check the status of the longitudinal stability indicator (if equipped). Refer to the Operation and Maintenance Manual, "Longitudinal Stability Indicator" for more information.
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| Illustration 3 | g00913198 |
(1) Boom Extension Reference Scales (2) Boom Angle Indicator | |
The machine boom has two scales which must be used for reference with the load chart in order to assess the lift operation. The boom extension reference scale (1) gives an indication of the boom length. The letters "B" and "C" correspond to the same letters on the load chart. The letter "A" on the load chart corresponds to the fully retracted position of the boom. The letter "D" on the load chart corresponds to the fully extended position of the boom.
The boom angle reference scale (2) gives an indication of the angle of the boom.
Follow the instructions below in order to assess the intended load:
- Carefully position the machine. The machine should be as close as possible to the intended load. For more information on operating the machine, refer to Operation and Maintenance Manual, "Operation Information".
- In order to move the work tool into position for the operation, raise the boom and extend the boom, as required. Do not make the lift operation.
- Look at the boom extension reference scale and the boom angle reference scale and note the readings. Refer to the load chart and use these two values in order to locate the equivalent load zone.
- If the intended load is equal to the value in the equivalent load zone the lift operation can be attempted with caution. Also, if the intended load is less than the value in the equivalent load zone the lift operation can be attempted with caution.
- If the intended load is heavier than the value in the equivalent load zone the lift operation cannot be made.
Examples of Estimating the Lift Operation from the Load Chart
Note: In the examples that follow, the numbers are from the load chart that is shown at the end of this section. This load chart is only for illustrative purposes. This load chart does not relate to any particular machine. The numbers that are quoted are in kilograms. The units on the load charts which are installed in a particular machine may be kilograms or pounds. The examples below refer to the lifting capacity chart for a machine that is equipped with forks.
Example 1
- The weight of the intended load is 800 kilograms.
- The boom angle reference is 52 degrees.
- The boom extension reference is in the area of the letter "B" on the boom.
With reference to the load chart, "X" is the point of intersection for the values of the boom angle reference and the boom extension reference. This point of intersection is in the load zone for 2500 kilograms. The intended load of 800 kilograms is less than the value in the load zone so the load chart indicates that the load is within the capacity of the machine.
Example 2
- The weight of the intended load is 1500 kilograms.
- The boom angle reference is 30 degrees.
- The boom extension reference is in the area of the letter "C" on the boom.
With reference to the load chart, "Y" is the point of intersection for the values of the boom angle reference and the boom extension reference. This point of intersection is in the load zone for 1500 kilograms. The intended load of 1500 kilograms is the same value as the value in the load zone so the load chart indicates that the load is at the maximum capacity of the machine.
Example 3
- The weight of the intended load is 1200 kilograms.
- The boom angle reference is 17 degrees.
- The boom extension reference is approximately 40 percent between the letter "C" on the boom and full extension. Full extension is "D" on the load chart.
With reference to the load chart, "Z" is the point of intersection for the values of the boom angle reference and the boom extension reference. This point of intersection is in the load zone for 1000 kilograms. The intended load of 1200 kilograms is greater than the value in the load zone so the load chart indicates that the load is beyond the capacity of the machine. The lift operation must not be attempted.
If the load chart indicates that the lift operation is within the capacity of the machine, attempt to make the operation but proceed with care. Remember that the load may weigh more than the estimate for the load. The load chart is for estimating the lift operation only.
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| Illustration 4 | g00913611 |
Typical Load Chart, Type 1 machine | |