Chamberlain LA412 - Manual (Page 10)

Check Your Gate
Gate MUST be level.
G
a
te
an
d g
a
te
p
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st M
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S
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be
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umb
.
Remove ANY/ALL wheels from the bottom of gate. Gate MUST NOT hit or drag across ground.
Gate MUST swing freely and be supported entirely by its hinges.
Preparation and Overview 10