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Electric Chain Hoist: Final Checks before Usage

                                                                 



Electric Chain Hoist: Final Checks before Usage


You just got your new Electric Chain Hoist installed and want to start using it immediately. However, make sure you check the following guidelines for a safe environment for your organization.

1. Preparations

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.



electric hoist test
Electric Chain Hoist Primary Checks

Such  as:  
  • 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

conntion supply
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 the 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 nameplates 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 nameplate 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 the upper limit.

(b) Lower Limit Switch

Press down push button until bottom hook reaches the lower limit and the reverse chain stopper touches limit switch.  Check if it stops at the 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 pushbutton switches to lower and/ or lift or descend hook several times. When the button is released, the brake should immediately stop the motor from running and the weight should stop at the very position.

6. Emergency Stop Button Test (optional)

While pressing down pushbutton 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 anyone step fails, check connection wire and the self-lock of the emergency stop button.


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