ASSEMBLY STEP 1
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 two washered bolts mounted on top of motor unit.
•Align rail and styrofoam over belt pulley. Cut tape from rail, chain and styrofoam.
•REMOVE STYROFOAM.
•Insert both washered bolts through the rail into the motor unit. Tighten bolts securely.
Use only these bolts! Use of any other bolts will cause serious damage to door opener.
•Position belt over the motor unit belt pulley.
CAUTION
To avoid SERIOUS damage to opener, ONLY use bolts mounted in top of motor unit.
Washered Bolt | Motor Unit | |
Belt Pulley | ||
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Rail Hole |
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USE ONLY THIS
TYPE AND SIZE
BOLT
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 |
| Nut Ring |
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BEFORE |
| AFTER RELEASE | |||
1" (2.5 cm) |
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Ring
Square
End
Nut Ring
Slots
Figure 2
Figure 3
6