SCHUNK KHM 40 - 5 Troubleshooting; Product Does Not Move; Linear Unit Is Not Performing the Entire Stroke; Lifting Unit Opens or Closes with a Jerk

Troubleshooting
02.00 | KHM | Assembly and Operating Manual | en | 389171
25
5 Troubleshooting
5.1 Product does not move
Possible cause Corrective action
Pressure drops below minimum. Check air supply.
Air connection [
}
21]
Compressed air lines switched. Check compressed air lines.
Air connection [
}
21]
Proximity switch defective or set incorrect. Readjust or change sensor.
Unused air connections open. Close unused air connections.
Flow control valve closed. Open the flow control valve.
Component part defective. Replace component or send it to SCHUNK
for repair.
5.2 Linear unit is not performing the entire stroke?
Possible cause Corrective action
Pressure drops below minimum. Check air supply.
Air connection [
}
21]
Mounting surface is not sufficiently flat. Check the evenness of the mounting surface.
Mounting the linear unit [
}
20]
Component part defective. Send product with a SCHUNK repair order or
dismantle product.
5.3 Lifting unit opens or closes with a jerk?
Possible cause Corrective action
Too little grease in the mechanical guiding
areas.
Clean and lubricate product.
Maintenance [
}
26]
Compressed air lines blocked. Check compressed air lines of damage.
Mounting surface is not sufficiently flat. Check the evenness of the mounting surface.
One-way flow control valve is missing or
adjustet incorrectly.
Install and adjust one-way flow control
valve.
5.4 Piston force decreasing?
Possible cause Corrective action
Compressed air can escape. Check seals, if necessary, disassemble the
product and replace seals.
Too much grease in the mechanical
movement space.
Clean and lubricate product.
Pressure drops below minimum. Check air supply.
Air connection [
}
21]