Attach the Rail to the Motor Unit
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
•Remove the bolt and lock nut from the top of the motor unit.
•Place rail onto the bolt mounted on the motor unit and align the back hole with the hole in the top of the unit.
•Fasten rail with the washered bolt and lock nut previously removed. Tighten securely. Remember to use only these bolts/fasteners! Any other bolts/fasteners will cause serious damage to the opener.
•Cut tape from rail, belt and styrofoam.
•REMOVE STYROFOAM.
•Position belt over the motor unit sprocket.
To avoid SERIOUS damage to opener, ONLY use bolts/fasteners mounted in top of motor unit.
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| Washered Bolt |
| Lock Nut | |
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USE ONLY THIS | Rail | Styrofoam |
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TYPE AND SIZE |
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Motor unit
Sprocket
ASSEMBLY STEP 2
Set the Belt Tension
•By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the trolley (Figure 1). Do not use any tools.
•Insert a screwdriver tip into one of the nut ring slots and brace it firmly against the trolley (Figure 2).
•Place a 7/16" open end wrench on the square
end. Rotate about 1/4 turn until the spring releases and snaps the nut ring against the trolley (Figure 3).
This extends the spring for optimum belt tension.
Trolley
Threaded
Shaft
Spring/Trolley Nut
Figure 1
Nut
Trolley
Threaded
Shaft
Trolley |
| Nut Ring |
| Trolley |
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BEFORE |
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1" (2.5 cm) |
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Figure 3
Ring
Square
End
Nut Ring
Slots
Figure 2
6