Warner Electric Wheel-Brakes (Std) User Manual
Page 6
Section ll. Installation
Prepare Brake and Axle for Installation
The performance of an electric brake depends entirely
upon an accurate installation. Follow instructions, for
accuracy is definitely demanded and a brake properly
installed assures long life and dependable perform-
ance.
In preparing for installation, make certain that the hub
drum pilot (A, Figure 2-1) is at a perfect right angle with
the drum mounting surface (B), and that the drum pilot
(A) runs concentric with the axle spindle within .010”
total indicator reading. This may be checked on the
axle with a dial indicator or by removing the hub and
placing it in a lathe, using its own bearings on the
arbor for centering. If drum pilot bore and mounting
holes are not already present, bore drum pilot, allowing
a maximum of .004” clearance; and drill bolt holes,
using the hub as a template.
Figure 2-1
Installing Drum on Axle
Install and Check Drum
Mount drum on hub and tighten securely. Check drum
for concentricity making certain that drum bore is con-
centric with axle spindle with .010” total indicator read-
ing. Rotate drum on hub for best results. If drum is not
within concentricity limits, place hub and drum assem-
bly in drum lathe (Figure 2-2) and remove the very min-
imum of stock which will permit drum to run within
concentricity limits. If it becomes necessary to remove
more than 1/32” from drum bore (diameter), remove
1/16” stock from drum and use oversized lining of
1/32” shim stock under lining to maintain proper drum
to lining clearance.
Figure 2-2
Checking Drum on Lathe
Install Flanges
If axle is equipped with brake mounting flanges suit-
able for installing electric brakes, clean flanges to
insure proper fit between flange and brake spider. If
axle is not equipped with flanges or old flanges are not
suitable for installing electric brakes, new flanges -
properly located - must be welded in position on the
axle. Cut off old flanges with a cutting torch leaving
axle clean and smooth.
Select the correct brake mounting flange for the size of
brake to be installed.
#4604 for 15 x 3” brake
#40039 for 12
1
⁄
4
x 5
1
⁄
2
” brake
#40039 for 16
1
⁄
2
x 5, 6, 7” brake
Mark the inside of the flange 1/16” larger than the actu-
al size of the axle, (Figure 2-3). Cut the opening with a
cutting torch or turn out on a lathe. If opening in flange
is not large enough to permit assembly over axle collar,
cut flange in half with a hacksaw. Do not use a cutting
torch!
Figure 2-3
Installing New Mounting Flanges
6
Warner Electric • 800-825-9050
819-0514
Axle
B
A
Hub
Mark 1/16”
larger than Axle
Saw Here