Graco 7421 - Manual (Page 66)

11. Tightening a lap-only belt:
An automatically adjusted lap belt
Ë
is
tightened by feeding the seat belt back into its
retractor while pushing down hard on the safety
seat or base. Make sure that seat belt is locked
in place and very tight.
A manually adjusted lap belt
Ì
is tightened
by pulling on the excess belt while pushing down
hard on the safety seat or base. However, you
may have trouble tightening the belt because of
the upright angle at which you must pull. You
may have to unbuckle the seat belt, estimate a
seat belt length that will make the seat belt very
tight, then buckle it again.
12. Tightening a lap/shoulder combination belt:
A lap/shoulder combination belt with a
locking latchplate
Í
is tightened by pulling
hard on the shoulder portion of the seat belt
while pushing down hard on the safety seat.
However, you may have trouble tightening the
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