LiftMaster LGJ Light-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters - Manual (Page 19)

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LGJ ILLUSTRATED PARTS
D3
5
2
1
D5
D11
D12
D1
4
6
D10
D7
D2
D9
3
D8
D6
D13
D4
D9
1a. Wall Mounting
The operator should generally be installed below
the door shaft, and as close to the door as
possible. The optimum distance between the door
shaft and operator drive shaft is between 12” - 15”.
Refer to Figure 3.
OPERATOR MOUNTING
IMPORTANT: The shelf or bracket must
provide adequate support, prevent play
between operator and door shaft, and permit
operator to be fastened securely and with the
drive shaft parallel to the door shaft.
1b. Bracket or Shelf Mounting
The operator may be mounted either above or
below the door shaft. The optimum distance
between the door shaft and operator drive shaft is
between 12” - 15”. Refer to Figure 4.
1c. Place door sprocket on the door shaft. Do not
insert the key at this time.
2. Wrap drive chain around door sprocket and join
roller chain ends together with master link.
3. Raise operator to approximate mounting position
and position chain over operator sprocket.
4. Raise or lower operator until the chain is slightly
taut (not tight). Make sure the operator output
shaft is parallel to door shaft and sprockets are
aligned. When in position, secure the operator to
wall or mounting bracket.
5. Align sprockets and secure, (see Figure 5).
FIGURE 4 FIGURE 3
Before your operator is installed, be sure the door has been properly aligned and is working smoothly. The
operator may be wall mounted or mounted on a bracket or shelf. If necessary, refer to the operator preparations
on page 3. Refer to the illustration and instructions below that suits your application.
Typical Right Hand
Wall Mounted Operator
OPTIONAL (LGJ)
Mounting Bracket
Be sure door
sprocket is properly
aligned with drive
before securing to
the shaft.
Chain Keeper
FIGURE 5
OPTIONAL (MGJ)
Mounting Bracket
P/N 10-9098
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