Owner's Manual

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.
MOUNTING THE OPERATOR
WHEN PREPARING THE MOUNTING SURFACE
ENSURE THE OPERATOR WILL BE RIGID AND
SECURE WHEN INSTALLED, THE MOUNTING
SURFACE WILL PROVIDE A LEVEL BASE, AND THE
OPERATOR’S DRIVE SHAFT WILL BE PARALLEL
WITH THE DOOR SHAFT. FAILURE TO MEET THESE
CONDITIONS WILL RESULT IN AN OVERALL UNSAFE
DOOR OPERATION AND PREMATURE FAILURE OF
THE DOOR AND DOOR OPERATOR.
1. Figures 2 and 3, page 6 illustrate several positions suitable
for mounting the operator; right hand or left hand wall
mount or horizontal (shelf) mount to the torsion shaft. For
sectional doors, the MO operator must be wall mounted.
For rolling steel doors the operator may be wall mounted or
hood mounted by using an optional hood mounting bracket,
[14]. A wall mounting plate [13] is also available from the
factory (see Figure 1). The mounting plate/bracket
provides for chain tension adjustment as well as aiding
installation.
NOTE: THE OPERATOR DRIVE SPROCKET MAY
BE INSTALLED ON EITHER SIDE OF THE GEAR
REDUCER. SELECTION DEPENDS ON WHICH SIDE
OF THE DOOR THE OPERATOR IS MOUNTED ON.
2. Determine which side of the door the operator will be
located on. Fasten the sprockets [5] and [12] and the keys
[4] on the chosen side of the torsion shaft of the door and
on the corresponding end of the output shaft of the operator.
Tighten the set screws enough to prevent the sprockets from
sliding off the shaft. If the door shaft lacks a keyway you
will need to drill and pin the sprocket in accordance with
Step 6 (tightening the set screws is sufficient for this step).
The sprockets should be kept as close as possible to the
bearings. Fasten the wall mounting plate or the mounting
bracket (as applicable and if available) to the operator gear
box flange. Temporarily suspend the operator in its
mounting position and such that the distance between the
door shaft and the operator’s output shaft is between 12”
and 15”. See Figure 5 for wall mount and Figure 6 for
hood mount illustration. The distance between the shafts
may be greater if the mounting conditions prohibit
installation as suggested.
3. Connect the two drive sprockets [5 and 12] with the drive
chain [6] and connecting link [7], shortening the chain to
the proper length if necessary. To shorten the chain use a
chain tool or drive out the appropriate rivets with a punch.
4. With the chain tight and straight and the operator’s output
shaft parallel with the door’s torsion shaft, trace the
mounting slots (holes) on the mounting surface then lower
the operator to the floor. The MO operator gear box
mounting hole pattern is shown in Figure 4.
5. The operator should be installed using 1/2” bolts through
the wall. If the building’s construction will not allow the
usage of through bolts then use lag bolts and shields (or the
equivalent type fasteners). Mount the operator, slipping the
drive chain on before bolting the operator to the mounting
surface but do not completely tighten the bolts at this time.
6. Re-align the door shaft and operator drive shaft sprockets
and connecting drive chain. Secure the sprockets in place
with their set screws. If no keyway exists in the door shaft,
drill a 5/16” through the door sprocket and door shaft with
the sprocket in its aligned position. Insert the 5/16” roller
pin [2] through the sprocket and shaft to secure the sprocket
in place. See Figure 7.
7. Adjust the drive chain tension such that there is no more
than 1/4” slack when the chain is depressed between the
sprockets. See Figure 8. The preferred mounting is with
the motor end up and the operator below the door shaft.
This results in better clearance for the hand chain and
disconnect chain.
8. Attach sash chain, item 10, with cotter pin, item 9. See
Figure 9, next page.
WARNING
Figure 4
107608
INSTALLATION INSTRUCTIONS
7