Maintenance
16K PLUS October 2019 6-9
Air Brake Maintenance
Every Three Months or 25,000 Miles
1. Check the condition of the foundation brakes,
including drums, shoes and linings, cams, rollers,
bushings, etc.
2. Check for structural damage of the housing, worn
clevis, worn clevis bushings and condition of the boot
for cuts or tears. Replace if necessary.
3. After allowing the brake drum to cool to room
temperature, check for correct chamber stroke
following the procedure on page 6-10. Due to different
operating conditions, chamber stroke tests may be
necessary at earlier intervals. See charts on page
6-10 for the recommended stroke measurements.
Note: An automatic slack adjuster should not have
to be manually adjusted except for initial
installation and at the time of brake reline.
Every Six Months or 50,000 Miles
Gunite slack adjusters are factory lubricated and
extensively sealed to protect against dirt, water, salt
and other corrosive elements. Nevertheless, periodic
lubrication is recommended.
Greasing the Slack Adjuster
1. A grease fitting is provided to allow lubrication
during normal chassis servicing (see g. 1). With
a conventional grease gun, lubricate until grease
appears on the camshaft, or grease ows from the
grease relief.
Note: Slack Adjusters with a grooved and drilled
worm wheel will not have a grease relief on
the end cap opposite the adjusting hex.
2. The newest Gunite slack adjusters are produced
without a grease relief, forcing lubricant through
the drilled worm wheel onto the camshaft. Previous
designs incorporated a grease relief (see g. 2).
3. Lubriplate Aero is the grease used in the manufacture
of Gunite slack adjusters. It is recommended for
use in temperatures as low as -40 degrees F (-40
degrees C).
Boot
Grease
Fitting
Hex
Extension
Figure 1 - Lubrication Points
Grease Relief
Figure 2 - Grease Relief
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