1, the engine cover is not open, first check if the engine Garah is disengaged, and if the pull is released, it is relatively tight when the pulling is removed, and it is not easy to pull the engine cover device;
2, The pulley is disengaged, and the leaf plate liner is needed, and the lock can be opened with the handover.
3, the pulley does not appear, the case where the lock is not opened, may It is the machine cover lock, re-locking two corner locks with hands, then re-pulling the switch, repeating several times, and then lubricate after opening, and prevent it.