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When the suspension is lowered clearances between the machine frames and suspension components are reduced. Persons on or near the machine could be injured by crushing. Keep all personnel clear of the machine until the suspension has been lowered. |
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Checking the Suspension
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| Illustration 1 | g00762238 |
The suspension cylinder on the left side of the machine is located in front of the hoist control valve. | |
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| Illustration 2 | g00762247 |
The suspension cylinder on the right side of the machine is located in front of the check and pressure reducing valve for the brake system. | |
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| Illustration 3 | g00781263 |
Check dimensions (A). Compare the results against the dimensions from previous checks on the suspension ride height. The suspension height will be different for each machine.
If the ride height is incorrect the ride height must be adjusted.
Lowering the Suspension
Personnel must be clear of the machine prior to setting the suspension.
- Before the suspension is lowered, park the machine on a level surface. Engage the parking brake and shut off the engine.
Note: The tractor wheels must be allowed to rotate as the suspension lowers.
- Use a suitable screwdriver to open the doors that are located on the tread plates on either side of the operator's compartment. The doors on either side of the operator's compartment cover the suspension control valves.
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| Illustration 4 | g00739590 |
- Open control valve (1) on the left side of the machine and control valve (3) on the right side of the machine in order to lower the suspension. Close both control valves when the suspension is fully lowered.
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| Illustration 5 | g00739588 |
Control valves for the suspension on the left side of the machine. | |
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| Illustration 6 | g00739461 |
Control valves for the suspension on the right side of the machine. | |
- Use a suitable screwdriver to close the doors on the tread plates.
Setting the Suspension
Personnel must be clear of the machine prior to setting the suspension.
Park the empty machine on a level surface. Engage the parking brake and lower the dump body.
- Lower the suspension. Refer to "Lowering the Suspension".
- Start the engine.
- Open control valve (2) on the left side of the machine and control valve (4) on the right side of the machine in order to raise the suspension. Close both control valves when the suspension has fully raised.
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| Illustration 7 | g00739588 |
Control valves for the suspension on the left side of the machine. | |
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| Illustration 8 | g00739461 |
Control valves for the suspension on the right side of the machine. | |
- Measure dimension (A) on both sides of the machine. Dimension (A) is the distance from the top of the rim to the bottom of the fender. Make a mark on each fender in order to record the measurement. Subtract 35 mm (1.38 inch) from dimension (A) in order to determine the correct dimension for setting the suspension. Record this number for both sides of the machine. Dimension (A) will be different for each side of the machine. Open control valve (1) on the left side of the machine. Allow the suspension on the left side of the machine to lower approximately 10 mm (0.4 inch). Close control valve (1) .
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| Illustration 9 | g00781263 |
- Move to the right side of the machine. Open control valve (3). Allow the suspension on the right side of the machine to lower approximately 10 mm (0.4 inch). Close control valve (3). Measure dimension (A) .
- You should alternate this procedure between the left side and the right side of the machine. The final measurement for each side of the machine will be 35 mm (1.38 inches) below the original measurement.
- Shut off the engine. Use a suitable screwdriver to close the doors on the tread plates.