LiftMaster SL3000UL3 Owners Manual - Page 14

Chain Installation Types, Chain Distance and Height on Gate, INCORRECT INSTALLATION

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CHAIN INSTALLATION TYPES Drawings not to scale Weld rear bracket with gate in closed position Horizontal Alignment Front Operator Position WARNING To reduce the risk of SERIOUS INJURY or DEATH, make sure exposed idler pulleys have safety covers on them. Weld front bracket with gate in open position. Rear Operator Position Cut the chain slot 17 1/2" high on cover. Low idler pulley position. CHAIN DISTANCE AND HEIGHT ON GATE CORRECT INSTALLATION INCORRECT INSTALLATION Don't connect chain too tight to gate. Top View of Gate 2 inch wire grid safety screen is missing. Chain is too loose on gate. Top View of Gate Chain is mounted too high or too low on gate. Gate is 4 inches minimum distance away from drive sprocket and parallel to gate. Operator is mounted too close and not parallel to gate. Over time, the gate's chain will stretch out and need to have links removed from it. The links can be removed during normal periodic maintenance of the operator. 12

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Horizontal Alignment
12
Chain is
mounted
too high
or
too low
on gate.
Chain is
too loose
on gate.
Don’t connect chain
too tight
to gate.
Weld front bracket with gate in
open position
.
Weld rear
bracket
with gate
in
closed
position
Cut the chain slot 17 1/2" high on cover.
Top View of Gate
Top View of Gate
Gate is 4 inches minimum
distance away from drive
sprocket and parallel to
gate.
Operator is mounted
too close
and
not
parallel
to gate.
INCORRECT INSTALLATION
CORRECT INSTALLATION
CHAIN DISTANCE AND HEIGHT ON GATE
CHAIN INSTALLATION TYPES
2 inch
wire grid
safety
screen is
missing
.
Over time, the gate’s chain will stretch out and need to have links removed from it. The links can be removed during normal periodic
maintenance of the operator.
Front Operator Position
Rear Operator Position
Low idler pulley position.
Drawings not to scale
To reduce the risk of SERIOUS INJURY or DEATH, make sure
exposed idler pulleys have safety covers on them.
WARNING