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6. Secure preload setting tool to the input shaft with the grub screw. Wind string round the end of the string. Whilst turning the input shaft cover of is achieved. Fitting sector shaft and piston-rack assembly 7. Fit the sector shaft to the housing and engage it with the input shaft worm in the straight 8. Screw-on, to the sector shaft adjuster, the sector shaft cover and secure with two or three of the six 9. Turn the adjuster screw clockwise, with a 6 key, shaft contact with the input shaft worm. 10. Without moving the adjuster, f i t the locknut whilst restraining the adjuster screw with the 6 key and just nip the locknut with an open-ended ST 1938M 11. Temporarily fit the drop arm and tighten the locknut until no clearance is between the sector shaft and drop arm. 12. Rotate the input shaft one turn clockwise, then the point at which the backlash the drop arm disappears or is ‘taken-up’. on to 13. Repeat instruction 12 and rotate the input shaft 19 |