If you're experiencing issues with your EVO2 automatic lifting hook not opening or closing, you're not alone. One of the most common culprits is the lock pin, a crucial safety component designed to prevent unintended movement of the hook. This article will guide you through diagnosing and resolving this issue effectively.
Symptoms
You may notice that the hook does not open or close, whether using the remote or the manual trigger button. Sometimes, the hook may have been functioning normally and then suddenly stopped without any visible damage. Additionally, if there is anything obstructing the hook's movement, the motor may attempt to operate but will be halted by an overcurrent protection mechanism.
Important Testing Note
Before proceeding with any diagnostics, ensure that the hook is hanging freely in a vertical position. Testing the hook while it is lying flat can lead to misleading results, as gravity plays a vital role in the hook's operation.
Step-by-Step Troubleshooting
Step 1 — Open the Rear Right Cover
Begin by removing the two screws from the rear right cover of the hook. Once the cover is off, you will have access to the internal mechanism, including the lock pin assembly.
Step 2 — Inspect the Lock Pin
Examine the lock pin, which consists of a metal block, a small axle, and a wheel. Check if the lock pin is correctly positioned, if the wheel turns freely, and if the shaft is bent. A misaligned or bent lock pin is often caused by lifting loads incorrectly, which can lead to operational failures.
Step 3 — Test with the Lock Pin Lifted
Using a flat screwdriver, gently lift the lock pin to free it from the cam. While holding it up, press the trigger button or send a remote command to see if the hook operates normally. If it does, the lock pin is likely the issue. If not, further investigation into the motor and gearbox may be necessary.
Step 4 — Adjust or Replace the Lock Pin
If the lock pin is slightly misaligned, you can adjust it by loosening the Allen screw, repositioning it, and then retightening the screw. Be sure to recalibrate the hook afterward. If the lock pin shaft is bent, it will need to be replaced. The complete lock pin kit (EVO2-1300) includes all necessary components and should not reuse old parts.
Important Reminder
Always lift loads from the hook saddle and never from the tip, as this is the primary cause of lock pin damage.
When to Escalate
If you encounter severe bending of the lock pin shaft, visible damage to the cam, or if issues persist after replacing the lock pin kit, please reach out to our Helpdesk with your hook's serial number and a video of the problem for further assistance.
By following these steps, you can effectively troubleshoot and resolve issues with your EVO2 hook, ensuring safe and efficient operation.