# General Troubleshooting

WARNING

Troubleshooting and repair should only be performed by skilled and trained personnel.

Symtoms | Cause(s) | Solution(s)
--- | --- | ---
Arm drifts or moves extensively. | Arm is not at level Arm payload is over capacity. | Adjust leveling of arm. Decrease payload.
Arm is difficult to move laterally. | Bearing shoulder nut is too tight. Shoulder or elbow bearings are contaminated. Bearing require re-lubrication. | Loosen shoulder nut slightly. Check / clean / replace bearing. Re-lubricate bearings.
Loss of air / no air supply. | Main air supply is turned off at shut-off valve. Air hose or tubing has become disconnected. Pneumatic component is blocked. Contaminated filter element: By the increased resistance of the filter the flow is limited and/or the pressure behind the filter is too low. | Check main air supply shut-off valve. Check fitting and air hose or tubing connections. Check components for blockage and clear out contaminants. Replace filter element
Arm is difficult to raise up (high force) / easy to pull down. Arm is difficult to lower down (high force) / easy to raise up. | Load no longer balanced -incorrect setting of precision pressure regulator. | Adjust precision pressure regulator.
Load moves suddenly after air supply is engaged. | The balance pressure for the cylinder(s) is either too low or too high. | Check setting of precision pressure regulator.