operators_manual

always test for air leaks, and check the
brakes for safe operation before putting the
vehicle in service. Below is a list of areas
to maintain for the air compressor:
• Inspect compressor air filter
element, if so equipped, and replace
element if clogged. Check
compressor mounting and drive for
alignment and belt tension. Adjust if
necessary.
• Remove compressor discharge
valve cap nuts and check for
presence of excessive carbon. If
excessive carbon is found, clean or
replace the compressor cylinder
head. Also, check compressor
discharge line for carbon, and clean
or replace the discharge line if
necessary.
• Disassemble compressor and
thoroughly clean and inspect all
parts. Repair or replace all worn or
damaged parts, or replace
compressor with a factory exchange
unit.
CAUTION
When draining the engine cooling system is
required, to prevent damage from freezing,
the compressor must also be drained at the
cylinder head and block. Engine damage
could occur if the cooling system is not peri-
odically drained and maintained. See Cool-
ing System for further information.
Brake System
General information about your vehicle's
brake system and its components.
To operate your vehicle safely and
profitably, you need some understanding of
its brake systems. For more on brakes, see
the Index, under Brakes.
WARNING!
Do not work on the brake system without
the parking brake set and wheels chocked
securely. If the vehicle is not secured to pre-
vent uncontrolled vehicle movement, it could
roll and cause death, serious personal injury
or damage to the vehicle.
CAUTION
The air brake system of this vehicle was
configured for ONE of the following opera-
tions: tractor or truck, and complies with the
respective portions of FMVSS 121. A tractor
shall not be operated or configured as a
truck, nor shall a truck be operated or con-
figured as a tractor, without significant modi-
fications to the air brake system in order to
retain compliance with FMVSS 121. Contact
your dealer for instructions.
WARNING!
Do not use brake linings with a thickness
below the specified minimum. Such linings
will have lining rivets exposed that can dam-
age the brake drum and reduce brake effi-
ciency, which could cause death, personal
injury or system failure.
MAINTENANCE - Brake System
160 Y53-6096-1A1 (01/17)
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