Loosen:
Slacken safety lock screw on the side of the knuckle.
Press down firmly and simultaneously turn the hexagon socket screw in the knuckle
anti-clockwise. Repeat this action until the hinge is completely loosened. Then install the hinges.
Tighten:
Turn the hexagon socket screw in the knuckle clockwise and set spring
force of all hinges equally as required. Re-tighten safety lock screw.
Note:
l. Door weight: <60 kg with 3 door hinges