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Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system. |
Preparing the Machine for Maintenance
Before you perform any testing or adjusting, eject all material from the body and fully retract the ejector blade.
Park the machine on a level surface. Move the parking brake control to the ENGAGED position and shut off the engine. Move the ejector control to the HOLD position.
Install the steering frame locks before entering the area around the oscillating hitch. Refer to Operation and Maintenance Manual, "Steering Frame Lock".
Allow only one operator on the machine. Keep all other personnel away from the machine. Also, all personnel should be visible to the operator.
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Personal injury or death can result from sudden suspension cylinder movement. Sudden movement, up or down, can cause the clearance above your head to change rapidly. Read all warning labels on the suspension cylinders before servicing. Do not check the oil in the suspension cylinder until all the nitrogen pressure has been released. Do not, under any condition, remove valves, cover or plugs from the cylinder unless the rod is fully retracted and all the nitrogen pressure is released. Do not stand under the machine when testing or adjusting the suspension cylinders. |
- The machine must be on level ground when you inspect the suspension cylinders. The truck must be empty. Coast the machine to a gentle stop without using the brakes. Apply the parking brake.
- Check the ride height of the machine and compare the dimensions against the dimensions from the previous servicing. The suspension height will be different for each machine.
- Both of the front suspension cylinders must be charged at the same time. If only one suspension cylinder needs servicing, perform the procedure on both suspension cylinders.
The oil for the hydraulic system should be at operating temperature before troubleshooting the hydraulic system.
Without operating the machine for at least 10 minutes the oil will not warm effectively. Perform the following procedure in order to warm the oil.
- Start the engine.
- Eject the blade and then retract the blade.
Repeat this procedure 10 times or repeat the procedure until the oil for the ejector and braking systems is at operating temperature.
- Check for adequate sideways clearance. Articulate the machine fully to the left. Articulate the machine fully to the right.
Repeat this procedure until the oil for the steering and fan drive systems is at operating temperature.