83–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle cannot drop. Failure to follow these steps
could result in serious personal injury or death.
83–01 Air Conditioner
Inspecting
WARNING
Wear eye protection, gloves, and protective cloth-
ing when working on the air conditioning system.
Leaking refrigerant from a damaged hose or line
could cause blindness or serious skin burns.
1. Park the vehicle on a level surface, shutdown the
engine, apply the parking brake, and chock the
tires.
CAUTION
To avoid the possibility of burns, make certain
that the engine and air conditioner components
are not hot.
2. Check the appearance of the air conditioner
compressor pulley assembly. If the friction sur-
face of the pulley shows signs of excessive
grooving due to belt slippage, replace both the
pulley and the drive plate. Visually inspect the
refrigerant compressor drive belt for damage,
and check that the belt is set at the proper ten-
sion. Also check the tightness of the compressor
mounting fasteners. For instructions and torque
values and for removal and installation proce-
dures, see Group 83 of the Recreational Vehicle
Chassis Workshop Manual, or take the vehicle to
an authorized Freightliner dealer.
3. Inspect the compressor clutch coil wire. Ensure
that the connector is not damaged or loose. Re-
place the wire if it is damaged.
4. Check the overall condition of the air conditioning
hoses. Look for cracks, cuts, and abrasions on
the hoses. Replace damaged hoses; see Group
83 of the Recreational Vehicle Chassis Work-
shop Manual for replacement instructions, or
take the vehicle to an authorized Freightliner
dealer. Also, visually check for loose fittings on
all air conditioning components. Do not over-
tighten the fittings.
5. Check for a buildup of road debris on the con-
denser fins. Using air pressure and a whisk
broom or a soapy spray of water, carefully clean
off the condenser. Be careful not to bend the
fins.
Heater and Air Conditioner 83
Recreational Vehicle Chassis Maintenance Manual, June 2015 83/1
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