Kilo User Manual Version 3.0
34
O-Rings
O-rings are critical to the waterproof nature of the Kilo. The O-rings should be visually inspected
to make sure that it is properly seated in the groove and to ensure there is no visible damage to
the O-ring. If the O-ring fails visual inspection or the Kilo has been deployed for longer than 2
months, the O-ring should be replaced prior to the next deployment.
At the bottom of the Kilo’s acetyl housing is a screw-cap with two O-Rings;
A0-2038N7 2-5/8x2-3/4 (O-ring 1)
568-137 70A DURO BUNA (O-ring 2)
To replace an O-ring:
Remove the old O-ring and clean all dirt away from the screw-cap and inner housing using
a lint free cloth, cleaning alcohol, and a soft-brush
Thoroughly inspect the O-ring groove as well as the point of contact on the inside of the
Kilo enclosure, any scratches or dirt could compromise the O-ring seal
Apply a thin layer of O-ring lubrication (Molykote 111 from Dow Corning) to the new O-
ring and gently slide the new O-Ring down over the threads of the screw-cap and into the
O-ring groove
Note:
It is very important to be aware of where the O-ring is sitting on the screw cap. If the O-
ring is not sitting perfectly in the O-ring groove, there will not be a perfect seal and could cause
fatal damage to the unit.
