Electric Chain Hoist: Final Checks Before Usage
Read carefully what has been stated in the instruction manual provided along with the Chain hoist, making sure that each step is correctly completed and all parts are strongly fixed.
- Is electric chain hoist correctly installed to the trolley?
- Is trolley stopper correctly located on the beam?
- Are bolt, nut and split pin tightened?
- Can push button cord wire support the pulling force made on controller suspension?
- Is cable support strongly fixed on cable support arm?
Danger: Do remember to cut off power source or breaker switch before repairing any machinery or electrics.
2. Lifting Test
Connect main switch power to the hoist and press down push button switch. If the hook travels in the wrong direction, power supply phase is not right. Therefore, cut off power source or breaker switch, exchange any two phases of the three phase electric power at power switch of hoist, and then hook will travel towards the push button direction.
3. Traversing Test
Test whether the control over trolley keeps the same direction as it travels. Make sure that trolley stably travels. Paste E/W or N/S on push buttons.
4. Limit Switch Test
Refer to name plates AB or AC on which writes upper limit or upper/lower limit. They are attached on the hoist to tell which type of limit switch is fixed. No name plate means that there is no limit switch.
(a) Upper Limit Switch
Press UP push button until lifting hook touches upper limit switch. Check if the hoist stops at upper limit.
(b) Lower Limit Switch
Press down push button until bottom hook reaches lower limit and the reverse chain stopper touches limit switch. Check if it stops at lower limit.In such two cases, you should check if chain spring has enough space when it is compressed.
5. Lifting & Falling Brake Test
Lift a moderate load. Press down push button switches to lower and/or lift or descend hook several times. When the button is released, brake should immediately stop motor from running and the weight should stop at the very position.
6. Emergency Stop Button Test (optional)
While pressing down push button switches , press down emergency stop button and then check whether the hook has stopped running and whether the hoist works in line with push button switch. Finally, turn emergency stop button to the right, release it after it pops out. Then operate it again. If any one step fails, check connection wire and self lock of emergency stop button.