operators_manual

Table Of Contents
WARNING
Use of an air dryer brand or model that
dif
fers from what was originally instal-
led could cause the air system to not
perform correctly unless the full air
system design is reviewed and modifi-
cations are made to comply with Fed-
eral Motor Vehicle Safety Standard
(FMVSS) 121 Air Brake Systems. Fail-
ure to abide by this warning and main-
tain compliance with FMVSS 121
could cause loss of vehicle control and
may lead to serious personal injury or
death.
The AD-HF Series air dryer has
incorporated into its design various
components that have typically been
installed separately on the vehicle (see
below for components/areas affected):
Pressure protection valves
Safety valve
Solenoid valves and plumbing
Plumbing of the front and rear
service air tanks
Plumbing to accessory systems
Standards (FMVSS 121 - Air Brake
Systems). As the W
arning above states,
any other type of air dryer installed in the
place of an AD-HF Series will require
changes, modifications and/or additions to
your vehicle’s air system to maintain
compliance with FMVSS 121.
Air Tanks
WARNING
If the supply and service air tanks are
not
drained at the recommended fre-
quency, water could enter the air lines
and valves. This could cause corrosion
or blockage, which could compromise
the brake system safety and potential-
ly cause an accident. Failure to comply
may result in property damage, per-
sonal injury, or death.
CAUTION
DO NOT use penetrating oil, alcohol,
brake
fluid, or wax-based oils in the air
system. These fluids may cause se-
vere damage to air system compo-
nents.
To eject moisture from the air system
tanks, pull the line that is connected to the
moisture ejection valve. Continue pulling
until the air comes out free of water
.
Daily
The supply and service air tanks, must be
drained on a daily basis. Operate air
devices daily to circulate lubricants within
the unit.
Periodically
Clean filter screens ahead of the valves by
removing the screens and soaking them in
MAINTENANCE - Air Tanks
These components are required to meet
the Federal Motor Vehicle Safety
Y53-6096-1C1 (09/20) 187
5