1. pls check the lifting hook if it is firmed and Check whether there is any wrong twist on lifting chain link to avoid lifting chain is stuck
2. when lifting, operator should stand with same plane with the hand chain wheel, then pull the hand chain with gentle power in case the hand chain jumpy and snap ring.
3. if has the phenomenon that cannot pull, pls do not pull with yank power, at this time, you should check carefully.
4. for ratchet and pawl springs, should often check, to prevent the brake failure and weight falling
when lifting, cannot use your hand to touch the lifting chain, otherwise it will lest hurt fingers
5. pls do not over weight used.