Break-In
Period
For
Electric
Drum
Brakes
The break-in period is a typical
phenomenon
with
drum
brakes
and
especially electric
drum
brakes. Electric
drum brakes
will
require a break-in period to achieve
full
performance. This break-in period applies for new
axles
and
any time
new
brake shoes
and/or
magnets
are installed as part of regular maintenance.
Lippert
Components
has found
through
extensive brake testing
that
the
break-in period for
our
drum
brakes
can
range
from 20
to
50 brake applications.
Brakescan be seated in by applying approximately 8-10 volts to
the
trailer brakes at an initialspeed of
40
mph
and
allowing
the
truck/trailer combination to slow
down
to
20 or 25 mph. For best results do
not
use truck brakes during this procedure. The trailer brakes
will
seat
in faster by using
them
to
stop
both
the
truck
and
trailer. The easiest
method
is
to
apply
the
trailer brakes using
the
manual
activation lever located
on
the
in-cab brake controller. Care MUST
be
taken
to
not
overheat
the
lining material,
therefore
brake
applications
conducted
at one-mile Intervals willsuffice. The driver should fee! a noticeable difference in
the
brake
performance
during
this period,
sometimes
in as few as 10 applications. After 50 applications,
the
brake lining material will be fully cured from
the
heat
and develop close
to
100%
contact
with
the
brake
drum
surface.
This break-in period
not
only seats
the
shoe
lining material
but
also seats in
the
brake electromagnets.
During
the
break-in period,
the
linings willwear at a faster rate
than
they
do after
they
are
seated
in.
NOTE: Brakes
should
be
manually
adjusted
after
the
first 200 miles of
operation
and
periodically
thereafter,
approx. 3,000 mile intervals.
Hubs/Drums/Bearings
Hub
Removal
To remove
the
hub
assembly for inspection,
maintenance
or service, follow
the
six (6)
steps
below:
III
111
I .
Lift
unit bythe frameand neverthe axleor suspension.
Do
not go under unit
unless
it is
properly
supported
by
jack
stands.
Unsupported
units
can
fall
causing
death
or
serious
injury.
1. Lifttrailer
and
support
it
per
manufacturer's
requirements.
2.
Remove
the
wheel.
3. Remove
the
grease
cap by prying
the
edge
out
of
the
hub. If
equipped
with oil lubrication, unscrew oil
cap
using a 2
VV
socket
(8K)
or
socket
(10-12K). Let oil drain into pan.
4. Pull
the
cotter
pin from
the
castle
nut
and
remove
the
outer
spindle nut.
5.
Remove
the
spindle
washer.
6. Pull
the
hub
off
the
spindle. Do
not
let
the
outer
bearing
cone
fall
free of
the
assembly. The inner
bearing
cone
will be
contained
by
the
seal
and
will
not
fall
out.
NOTE: Brakes
may
need
to
be
adjusted
or backed off to
remove
drum
from spindle.
NOTE:A
gear
puller may be necessary
to
remove
hub
from spindle.
Rev:
08.25.2015
Trailer
Axle
(8-12K)
Owner's
Manual
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