SPRINGS, PULLEYS, CABLES AND MOUNTING HARDWARE USED TO
BALANCE YOUR GARAGE DOOR ARE UNDER EXTREME TENSION AT ALL
TIMES AND CAN CAUSE SEVERE INJURY OR DEATH IF DISTURBED.
DO NOT ATTEMPT ADJUSTMENT.
Page 8 illustrates several positions suitable for
mounting the operator; right hand or left hand,
either wall mount or ceiling mount.
CHAIN COUPLING MOUNTING
Refer to Figure 2 (at right), Figure 1, page 4 and
Table 1, page 5 for component identification and
the operator mounting slot locations. Place the
sprockets [ 2 ] and [ 16 ] on the chosen side of
the torsion shaft of the door and on the
corresponding end of the output shaft of the
operator, see Figure 3, page 7. The sprockets
should be kept as close as possible to the
bearings. Fasten the connecting link to each end
of the door chain and loop the chain over the
sprocket [ 2 ] on the torsion shaft. Temporarily
suspend the operator in its mounting position
using the chain over the sprocket [ 16 ] at one
end of the jackshaft and a rope or chain at the
mid point (to support the operator weight). With
the chain tight and straight and the jackshaft
parallel with the torsion shaft, trace the mounting
slot on the mounting surface then lower the
operator to the floor.
IT IS ESSENTIAL THAT THE SURFACE
SUPPORTING THE OPERATOR BE RIGID AND
SECURE. FAILURE TO PROVIDE A FIRM
MOUNTING SURFACE WILL RESULT IN
DAMAGE TO THE DOOR TORSION SHAFT
AND THE PREMATURE FAILURE OF THE
OPERATOR.
If the construction permits, the operator should be
mounted with 3/8 inch diameter bolts through the
wall. If it is not feasible to go through the wall,
then use lag bolts to fasten the operator to the
mounting surface. Locate the four holes within
the tracings of the slots made in the previous step
at the positions which will allow for adjust-ment of
the chain tension. After drilling the mounting
holes and installing lag shields if necessary, bolt
the operator to the mounting surface but do not
completely tighten the bolts at this time. Check
the alignment of the sprockets, adjust their
positions on the shafts if necessary and tighten
the set screws securely on both sprockets.
pulling downward on the operator to remove
slack from the chain, tighten the four mounting
bolts.
Inspect the installation. There should be no
slack in the chain but neither should it be under
severe tension which might shorten the life of
the bearings. If there is any flexibility in the
system due to construction of the surface
supporting the operator or noticeable deflection
of the door shaft, it is advisable to install a shaft
support between the operator jackshaft and the
door shaft to prevent the loss of limit settings
due to the possibility of the chain jumping over
the sprocket teeth. Shaft supports are available
from the factory.
If no keyway exists in the door shaft, drill a 3/8”
diameter hole through the door sprocket and
door shaft with the sprocket in its aligned
position. Insert a 3/8” diameter bolt (not
provided) through the sprocket hub and shaft.
Secure with a lock washer and hex nut. See
Figure 4.
WARNING
INSTALLATION INSTRUCTIONS
6
107851
Figure 2
13.00”
7.75”
1.50”
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