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To prevent personal injury when checks are made while the machine is in operation, make sure only approved personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in an open area. |
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The operation checks can be used in order to find leakage in the system. The operation checks can be used to find a bad valve or a bad pump. The speed of the rods during cylinder movement can be used as an indication of the cylinder condition and of the pump condition.
Make sure that the machine is resting on a smooth, level surface. The machine should be moved away from other operating machines and away from personnel.
Start the engine. Move the hydraulic lockout control to the UNLOCKED position.
Warm the hydraulic oil to normal operating temperature.
Repeatedly move the work tool into the LIFT position and into the LOWER position.
- Watch the cylinders during the extension and during the retraction. Cylinder movement must be smooth and regular.
- Listen for noise from the pump.
- Listen for the sound of the line relief valves. The line relief valves must only open during the full extension of the cylinders or during the full retraction of the cylinders.