1. Remove the boot clamps and collapse boots, if the screw jacks is equipped with boots. Remove the traveling nut from the screw.
2. Loosen the set screws in the housing cover and remove the housing cover by rotating counter-clockwise (CCW.)
3. The screw assembly can now be removed from the screw jacks sleeve. The screw assembly consists of the lifting screw, the upper thrust bearing / tapered roller bearing, the key and the wormgear. The upper thrust bearing / tapered roller bearing can be removed from the assembly. The wormgear can be pressed off the screw for replacement if necessary. Note: On inverted rotating screw jackss models, it may be necessary to remove the screw first.
4. Remove screws from the bearing cover. Remove the bearing covers and seals carefully to avoid damaging seals. Make sure keys have been removed first. 
5. Carefully remove the shims from the screw jacks sleeve or bearing cover. Note: there will not necessarily be an equal quantity of shims per side. Keep track of the number and order of shims on each side of the screw jacks. 
6. Remove the worm bearings. The cup may be press-fit and require the use of a dead-blow, plastic or other non-marring mallet to remove the worm.