Manual D450 • Fishing Bumper Subs • Page 5
Logan Fishing Bumper Sub
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5
KNOCKER SEAL/RING ASSEMBLY INSTALLATION
Completed knocker assembly with seal protec-
tor rings, non-extrusion rings, and O-rings cor-
rectly installed in the upper and lower grooves.
Install the O-ring. Stretch the o-ring until it is
large enough to fit around the knocker.
Using the O-ring installation tool, insert the
O-ring in the groove between the seal protector
ring and non-extrusion ring.
Repeat seal/ring installation procedure on the
upper groove.
Matching the bevel of the non-extrusion ring
to the bevel of the groove, carefully expand
the non-extrusion ring to fit over the outside
diameter of the knocker. Do not expand the
non-extrusion ring more than absolutely neces-
sary. Slide the non-extrusion ring over the
knocker and into the groove.
Before installation, carefully examine and clean
each groove. Smooth out any nicks or burrs
with emery cloth.
With the aid of the O-ring installation tool
(Logan Part No. J1074, available upon request),
press the seal protector ring into the groove
next to the non-extrusion ring with the thumbs
until the ring is firmly seated in the groove.