Step 1: Roller assembly
Keep the rollers aligned, assemble the roller with the connectors and secure it with
the corresponding bolts as figure below:
Step 2: Torsion bar and arm assembly:
keep the four face aligned , connect the torsion bar with the connectors and secure it
with the corresponding bolts as figure below:
Then assembly the arm to the torsion bar as figure below.Two arms need in the
same direction, the rope of arm cannot be unlocked until the whole assembly are
complete.
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