10
POWER HEAD & RAIL ASSEMBLY
FIG. 1-5 Chain adjustment.
FIG. 1-4 Rail - Power head assembly.
NOTE: Handle carefully! Drive chain can slide out
of rail.
NOTE: For power head and rail assembly locate
Bag 1 from Box 1.
1. Attach rail assembly to power head by aligning
the sprocket onto the motor shaft. Use (3)
bolts, 5/16"-18 x 1/2" (Fig. 1-4).
2. Tighten the chain by turning the adjustment
nut clockwise. The chain adjustment nut is
located opposite the power head at the other end
of the rail (Fig. 1-5).
3. Tighten chain until chain is approximately 1/8
inch above the base of the rail at midpoint on
the rail (Fig. 1-5). Do NOT over tighten chain.
REMINDER: You should have removed all ropes
and/or cables and disabled the door lock already.
If you have not, remove all ropes and/or cables
and disable garage door lock NOW before
continuing with installation (Fig. 1-6).
Set assembled power head and rail aside. Begin with
Section 2 INSTALLATION.
Chain Pulley Bracket (at wall end of rail)
Chain
T-Rail at center of rail assembly
1/8"
T-Rail
Chain
Tighten nut to move pulley this direction
Use 1/2" socket
on adjustment nut
FIG. 1-6 Disable garage door lock.
FIG. 1-2 Split Rail sections.
FIG. 1-3 Split Rail assembly.
A
B
Chain Rail
Center Rail
End Rail
Wire Tie(s)
NOTE: For split rail clamps, nuts, and bolts
locate Bag 0 from Box 1.
3. Remove the two rail sections that are not
connected to the chain and place them on
floor (Fig. 1-2, A).
4. Carefully remove the third rail section with
chain and plastic sleeve. Place rail section on
floor and extend chain straight out. (Fig. 1-2,
B). Chain and rail should extend approximately 7
feet.
5. Remove wire ties and plastic bag from chain.
Leave chain extended straight out on floor.
Avoid kinks in the chain by careful handling and
keeping chain flat on the floor.
6. Align the three rail sections by pulling the
chain straight and wrapping it around the
chain tensioner pulley (Fig. 1-3).
7. Attach the two rail clamps to the rail section
joints with (4) bolts and nuts. After both rail
clamps have been assembled to the rail sections,
securely tighten the bolts and nuts.
PN# 3642036212, 8/09/2007
Rail Clamps
Rail Clamp Bolts
Rail Clamp Nuts
Chain tensioner
Rail with chain
Center Rail
End Rail
Chain
Release
Knob
NOTE
Som
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bra
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Co
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door distr
ibut
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.
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