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e. As shown below, each upper tube section (except the top, tip section)
requires a polymer tube ring to prevent the tube from collapsing down into
the larger diameter tube immediately below it.
f. To install a ring, slide it over the top of each upper section and use your
thumb and index finger to squeeze the ring tabs until the teeth click
together, as shown below.
g. Next, slide the ring down the tube toward the lower, larger tube section.
All tube diameters are tapered, so the goal is to have the ring fit tightly
against the top of the adjoining lower tube section. You may have to slide
the ring back up the tube (where the diameter is smaller) to advance the
ring latch another click and then slide the ring back down the tube before
you find the perfect fit. No pliers or tools are needed! This process is
easily done by hand. Use common sense to determine when a ring is
tight enough to keep the associated tube from collapsing.
NOTE: Unlatching a tube ring is easy! Use both hands. Push
forward on one ring tab while pulling back on the other tab
to free the latching mechanism.
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S9v 31' M K II Installation Guide
17
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