Double beam hook blocks is composed of hook and pulley, as shown in the figure:
1. Removal of pulley
(1) unscrew nut 27, bolt 28 and remove slide wheel cover 6;
(2) remove the lock nut 15 and nut 14, washer 17, 18 and 13;
(3) pull the whole pulley group out of the pulley shaft 8 with a puller;
(4) take down the pressure cover 9, and make the bearing with copper bar. Take out the interval sleeve 19, take out the expansion ring 20, and the last bearing in the hitting pulley 7, the pulley will be disassembled.
2. Maintenance of pulley
(1) clean the pulley, check the abrasion condition of the pulley, and replace it in time if it exceeds the scrap standard. The cast steel pulley can be manufactured by rebottle car after being patched.
(2) the oil hole and lubricating oil groove of the roller shaft shall be cleaned and the bearing, spacing ring and expansion ring shall be cleaned before loading.