Chamberlain LiftMaster Professional K72-12567 User manual

APPLICATION REQUIREMENTS
Replacement of Disconnect Assembly and/or its components for a Model MGJ Operator.
PACKING LIST
1 Disconnect Hub 1
2 Disconnect Support Bracket 1
3 Bevel Gear Yoke 1
4 Release Lever 1
5 Disconnect Shaft MGJ 1
6 Sprocket, 41B19 x 1.25 Bore 1
7 Compression Spring 1
8 12ft. Of Sash Chain 1
9 Disconnect Key 1/4 x 1/4 x 7/8 2
10 Washer 3
11 Screw, #10-32 Hex Head Socket 2
12 #10 Lock Washer ZP 2
13 Cotter Pin, 5/32" x 1-3/4" Long 4
14 Roll Pin, 1/8" Dia. x 1" Long 1
15 E-ring, 1" Plated 2
DISCONNECT ASSEMBLY
SERVICE KIT
K72-12567
5
6
1
3
2
7
4
8
10
11
12
13
9
14
13
15
15
ITEM DESCRIPTION QUANTITY

© 2007, The Chamberlain Group, Inc.
01-12562C All Rights Reserved
INSTALLING NEW ASSEMBLY
1. Insert the roll pin into the end of the disconnect shaft
(Figure 1). Attach the sash chain to the end of the release
lever with a cotter pin. For the remainder of the
installation, follow the steps outlined to the left in
reverse order.
2. To re-attach the electrical box, line up the slotted holes in
the bottom of the box with the corresponding holes in
the motor frame. Attach the box to the frame with the
hex screws (4). Do not tighten screws at this time.
3. Replace the limit chain and secure with master link. Slide
the new electrical box in its slots until most of the slack
in the limit chain is picked up, being careful not to
over-tighten chain. Secure the new electrical box to the
motor frame by tightening the hex screws.
4. Reconnect the motor wires (as shown in the diagram
inside electrical box cover or refer to Owners Manual)
and replace the electrical box cover.
5. Reconnect power to operator.
To prevent possible SERIOUS INJURY or DEATH,
disconnect electric power at the fuse box BEFORE
proceeding. If necessary remove the operator from its
mounted position.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNINGWARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
INSTALLATION
NOTE: Refer to the Owner’s Manual supplied with the
operator for all mounting and wiring instructions.
REMOVE EXISTING ASSEMBLY
1. Disconnect power to operator.
2. Remove the master link from the limit chain, remove the
chain and set it aside. Remove the electrical box cover.
Disconnect the motor wires that pass into the electrical
box.
3. Remove the flanged hex screws (4) securing the
electrical box to the motor frame. Remove the box and
set it aside.
4. Remove the e-rings (2) securing the sprocket on the
gear reducer shaft. Remove the sprocket from the shaft.
Remove the screws securing the yoke to the disconnect
shaft, set the yoke aside. Remove the cotter pins (3)
from the disconnect shaft. Slide the old disconnect shaft
out of the support bracket. The release lever will now be
free inside the motor frame. Remove the release lever
and sash chain from the motor frame. Remove the old
disconnect support bracket by first removing the gear
reducer housing screws (2). Slide the disconnect hub,
compression spring, and flatwasher from the end of the
gear reducer shaft.
Figure 1