Warner Electric Electric Wheel Brake 12-1 Installation Instructions
12-1/4" x 3-1/2" Electric Wheel Brake
A-216
819-0244
Installation Instructions
A
A
˚
14 1/8 dia.
12.260
12.250
finished
drum dia.
4.510
4.503
pilot dia.
4.515
4.490
dia.
11.750
11.715
dia.
.290/.265 Dia. (6) holes equally spaced on
11.000 dia. within .007 R. of true position
(C'sunk for 1/4 dia. 80∞ flat head machine
screws with nuts and lockwashers, or 80∞ flat head rivets)
.170 min.
1/2–20 UNF-2A, (6) req'd.
Equally spaced on 5.500 dia. within
.005 R. of true position to
4.510/4.503 pilot diameter
.540
dia. min.
2.125
max.
Torque to
71-79 ft. lb.
4
3
1
2
1.100 min.
.125 ref.
.224
.205
3.881 min.
4.068 max.
4.381 min.
4.752 max.
3.567
3.507
12.225
12.195
factory adjustment diameter over brake linings
Face View of Brake Assembly
(Drum and armature removed)
(2) 1/4 dia. terminal studs
Section A–A
The magnet arm will
clear a maximum axle
of 3 1/2" diameter
or a 3" square
positioned as shown
Contents
Failure to follow these
instructions may result in product
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Technical Specifications . . . . . . . . . . . . . . . . . .3
Installation Instructions
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Preparing the Brake Mounting Surface . . . . .3
Installing on Axle Flanges . . . . . . . . . . . . . . .3
Installing the Brake . . . . . . . . . . . . . . . . . . . .4
Preparing the Brake Drum . . . . . . . . . . . . . .4
Adjusting the Brake . . . . . . . . . . . . . . . . . . . .5
Installing the Trailer Brake Wiring . . . . . . . . .5
Replacement Parts . . . . . . . . . . . . . . . . . . . . . .6
Towing Products Required with your
12-1/4" x 3-1/2" Brakes
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Load Control . . . . . . . . . . . . . . . . . . . . . . . . .8
Front Axle Resistor . . . . . . . . . . . . . . . . . . . .8
Warranty . . . . . . . . . . . . . . . . . . . . . . .Back Page
Dimensions when used with .224/.205 Armature, Warner Electric Part No. 110-0124
damage, equipment damage, and
serious or fatal injury to personnel.
Right hand brake shown
Left hand brake opposite
Drawing No. I-26117
Warner Electric • 800-825-9050 A-216 • 819-0244
2
Technical Specifications
5.5 00
DIA . B.C.
.14 0 R. M ax.
60∞
.53 5
.52 5
DIA . (6) HOLES
EQU ALLY SPACE D.
LOC AT ED WIT HIN
.00 5 R. O F
TRU E POSI TION.
3.0 60
3.0 30
1.5 30
1.5 15
1.5 30
1.5 15
3.0 60
3.0 30
.14 0
.12 0
6.6 25
6.5 95
DIA
.
4.5 00
4.4 98
DIA .
Brake Rating – 7,500 lbs. to 10,000 lbs. axle
rated per pair. Based on an average retarding
torque which will produce a minimum of 43.5%
2
retardation, or 14 ft./sec.
mph initial velocity with 13.3 in. to 17.2 in. rolling
radius tires, with 10.8 volts at the magnets.
Mounting – 6 holes on 5.5" B.C.
Electrical – 12 Volt D.C. system only
Lining Area – 90 sq. in.
deceleration from 20
Drum Swept Area – 135 sq. in.
Lining Thickness – 5/16" nominal
Assembly Weight – 25 lbs. per brake
7 lbs. per armature
Note: Use with armature type drum only.
12-1/4" x 3-1/2" Utility Brake
Installation Instructions
The performance of your Warner Electric 12-1/4"
x 3-1/2" brake depends greatly on accurate
installation. Since proper installation helps to
assure long life and dependable performance,
please follow these installation instructions
carefully. Pay particular attention to drawing
I-26117 on page 2 of the manual.
General Instructions
The Warner Electric 12-1/4" x 3-1/2" utility
brake is designed for use with one-piece steel
armature number 110-0124, mounted inside
the brake drums.
For other possible combinations, please consult
your Warner Electric sales representative or
Warner Electric at 815-389-3771.
Warner Electric • 800-825-9050 A-216 • 819-0244
Axle Flange
Flanges available from a factory source.
A. Preparing the Brake Mounting Surface
Before installing the brake, check the
concentricity and squareness of the brake
drum to the hub and spindle. To do this,
mount the drum on the spindle according
to the manufacturer’s specifications.
The following tolerances must be held:
Drum friction surface concentric to spindle
centerline within .015-inch T.I.R. (Total Indicator
Reading).
Armature surface square to spindle within
.020-inch T.I.R.
B. Installing on Axle Flanges
1. The axle flange on which the brake mounts
must have a 4.500/4.498-inch pilot diameter.
2. This axle flange must be welded concentric
to the spindle within .015-inch T.I.R.
(measured at the pilot diameter). The axle
must be square to the spindle within
.010-inch T.I.R. (measured at the brake
mounting surface). Refer to drawing I-26117.
3
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