Chamberlain LiftMaster K72-12564 User manual

APPLICATION REQUIREMENTS:
Replacement of Output Shaft and/or its components for a Model H Operator.
PACKING LIST:
K72-12564
Output Shaft Assembly Service Kit for
Model H Operators
DESCRIPTION
Output Shaft
1” I.D. Ball Bearing
48B32/48B14 Idler Sprocket Assembly
48B32 Sprocket
Sprocket, 48B18 LGE
Sprocket, 50B12 LGF
#48 Chain 47P W/ML
Spacer 1-1/32 x 1-1/2 x 1/64
Spacer 1-1/16 x 1-1/2 x 1/16
Key 1/4 x 1/4 x 1-1/2
E-Ring 1” Plated
Shaft Collar
QUANTITY
1
2
1
1
1
1
2
2
4
2
2
2
PART NUMBER
11-10879
12-10891
15-10885
15-48B32LXX
15-48B18LGE
15-50B12LGF
19-48047M
80-206-10
80-206-11
80-207-19
87-E-100
13-18691
ITEM
1
2
3
4
5
6
7
8
9
10
11
12
END VIEW
1
2
2
3
4
6
5
7
7
8
8
9
12
9
9
9
10
10
11
11
12

INSTALLATION INSTRUCTIONS
Slide the output shaft out of the Motor Frame from the
output sprocket side. The interior sprockets and shim
washers will slide off the shaft as it is removed. Remove
the two ball bearings from the Motor Frame.
INSTALLING NEW OUTPUT SHAFT:
Press the new ball bearings into the motor frame. Referring
to the illustration above, attach new output sprocket to the
new output shaft along with a key using the set screw. Do
not fully tighten the set screw at this time. Refer to the
illustration and the Owner’s Manual as necessary for the
remainder of the installation. Add the necessary shim
washers. Slide the new output shaft into the Motor Frame,
picking up the appropriate washers and sprockets in the
reverse order from how they were removed before. Align
the two interior sprockets by re-attaching the three lengths
of chain connecting the clutch and output shafts. Tighten
the 48B32 sprocket with its set screw and secure the
combination sprocket with push on fasteners. Attach the
new limit sprocket, aligning it before securing it in place
with its set screw. Secure the new output shaft in the Motor
Frame with the shaft collars and washers supplied and re-
attach the Motor Plate.
Replace the limit chain and the drive belt. Restoring power
completes the installation.
NOTE: Refer to the Owner’s Manual supplied with the
operator for all mounting and wiring instructions.
REMOVE EXISTING SHAFT:
Remove the master links from the limit and output chains.
Remove the chains and set them aside. Remove the drive
belt from the clutch and set it aside. Remove the four
screws connecting the Motor Plate to the Motor Frame. Lift
off the Motor Plate and set it aside.
Disconnect and remove the three interior chains connecting
the clutch and output shafts. Remove all push on fasteners
from the output shaft. Remove the output shaft limit
sprocket by first loosening the set screw and then sliding it
off the shaft along with its key. Loosen the set screw of the
48B32 sprocket.
WARNING
CAUTION
WARNING
WARNING
DISCONNECT POWER AT THE FUSE BOX BEFORE
PROCEEDING. IF NECESSARY REMOVE THE
OPERATOR FROM ITS MOUNTED POSITION.
© 2002, The Chamberlain Group, Inc.
01-12570D All Rights Reserved