You need to hold the cylinder, insert tumbler springs into the 4 spring wells, install the tumbler for key cut position 7 into the slot nearest to the front of the lock cylinder, install the 3 remaining tumblers, key cut positions 8, 9, and 10, into the cylinder, snap the tumblers into place with light hand pressure, and inspect for the correct loading of the tumblers.
By BobGM Specialist
01/11/2022