Chamberlain HJ Owner's Manual page 9

BRAKE INSTALLATION & ASSEMBLY PARTS
WARNING
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION,
ELECTRICAL POWER TO OPERATOR BEFORE
PROCEEDING.
1. Install brake drum on clutch pulley shaft as
illustrated in Fig. A.
2. Attach the four spacers provided to back of brake
pulley assembly housing using four 5/16 x 5/8
sems screws (Fig. B).
3. Push brake lever engaging nylon stud release
between brake shoes and align brake drum
between brake shoe assembly (Fig. B).
4. Adjust spring loaded bolt on brake shoe assembly
so that spring is compressed to 1".
5. Mount brake assembly housing to operator frame
using the four spacers and 5/16 x 3/8 sems screws
(See Fig. B).
6. Remove plug from 7/8" hole in electrical box and
attach conduit assembly.
7. Connect wires per master wiring diagram, (See
"brake optional").
8. Reconnect power to the operator.
9. Test for proper brake operation and replace brake
cover.
ADJUSTMENT: The brake assembly is self-
adjusting and should not require further
adjustment.
KIT NO. DESCRIPTION
1A3989 115V Solenoid Brake, M - Series
1A4045 115V Solenoid Brake, H - Series & APT 2211
1A4046 230V Solenoid Brake, H - Series
1A4047 460V Solenoid Brake, H - Series
11
ITEM PART NO. DESCRIPTION & QUANTITY
1 17D111 Brake Box (1)
2 204B118 Solenoid 115V (1)
204B118-1 Solenoid 230V (1)
204B118-2 Solenoid 460V (1)
3 113B49 Brake Lever, Pivot (1)
4 179A46 Brake Release Stud
5 142A143 Brake Stud Plate (1)
1A3989, 1A4045, 1A4046 & 1A4047
DISCONNECT
Brake Drum
Spacer
3
4
REPAIR PARTS FOR BRAKE ASSEMBLY
A
3/4" Washer
3/4" Washer
Push Brake Lever
to Disengage Brake
Shoe Assembly
Nylon
Stud
Release
1
12
Brake Shoe
Assembly
5/16" x 5/8"
2
SEMS Screw
8
1
12
7
2
6
5
5
8
11
7
6
5
ITEM PART NO.
6 1B4421
7 60B31
8 179B45
9 184A111
10 1B3933
1B4044
11 31D387
12 31A388
9
Clutch
Pulley
Cotter
Shaft
Pin
Cotter
Pin
Brake Drum
B
5/16" x 5/8"
SEMS Screw
9
Brake Drum
Spacer
9
10
3
4
10
DESCRIPTION & QUANTITY
Brake Shoe Assy. (2)
Brake Drum (1)
Brake Pivot Stud (3)
Brake Spacer (4)
Conduit Assy. M-Series (1)
Conduit Assy. H-Series (1)
Cover (1)
Dome Plug (1)