Take note of the orientation of the side panels. There is a relief cut for the spring hinge (circled in red).
VAULT ASSEMBLY
1.
Degrease all surfaces before welding.
2.
Weld the hinge on the proper end to prevent tampering/removal of the pin.
Open and close the hinge. You will notice at one end the hinge pin will appear to rotate
inside the leaf.
Do not weld this end
as it will restrict movement. At the other end the
hinge pin should appear to be fixed with the leaf as it is opened and closed. Place a tack
weld on this end. Check for unrestricted movement. The hinge should operate
smoothly with some spring resistance.
Grind the tack weld flush to allow proper fitment with the lid.
