Ford Taurus, Руководство пользователя

Страница: 65 / 2156

when tightening these flare nut fittings.
R-12 refrigerant is a chlorofluorocarbon which, when released into
theatmosphere, can contribute to the depletion of the ozone layer in the
upperatmosphere. Ozone filters out harmful radiation from the sun.
z Do NOT attempt to discharge the system by merely loosening a fitting, or
removing the service valve caps and cracking these valves. Precise control is
possible only when using the service gauges. Wear protective gloves when
connecting or disconnecting service gauge hoses.
Be sure to consult the laws in your area before servicing the
airconditioning system. In some cases, it is illegal to perform repairs
involvingrefrigerant unless the work is done by a certified technician.
z
Discharge the system using the proper discharge equipment, as high
concentrations of the gas can exclude oxygen and act as an anesthetic. When leak
testing or soldering this is particularly important, as toxic gas is formed when the
R-12 contacts any flame.
z NEVER start a system without first verifying that both service valves (if equipped)
are backseated, and that all fittings throughout the system are snugly connected.
z Always wear goggles when working on a system to protect the eyes. If refrigerant
contacts the eye, it is advisable in all cases to see a physician as soon as
possible.
z Frostbite from liquid refrigerant should be treated by first gradually warming the
area with cool water, and then gently applying petroleum jelly. A physician should
be consulted.
z
Always completely discharge the system into a suitable recovery system before
painting the vehicle (if the paint is to be baked on), or before welding anywhere
near the refrigerant lines.
z When servicing the system, minimize the time that any refrigerant line or fitting is
open to the air in order to prevent moisture or dirt from entering the system.
Contaminants such as moisture or dirt can damage internal system components.
Always replace O-rings on lines or fittings which are disconnected. Prior to
installation, coat, but do not soak, replacement O-rings with suitable compressor
oil.
Most repair work on an air conditioning system should be left to
acertified professional. DO NOT, under any circumstances, attempt to
loosen ortighten any fittings or perform any work other than that
outlined here.
SYSTEM INSPECTION
It is possible to detect possible air conditioning system problems by a visual
inspection. Check for a broken air conditioning belt, dirt blocking the condenser,
disconnected wires, a loose compressor clutch, and oily residue around the air
conditioning hose fittings. Missing service gauge port caps may also cause a leak
to develop.
REFRIGERANT LEVEL CHECKS
The only way to accurately check the refrigerant level is to measure the system
evaporator pressures with a manifold gauge set, although rapid on/off cycling of
Стр . 39 из 52 ROUTINE MAINTENANCE
18.11.2005 http://www.chiltondiy.com/content/8687/8687_1_6.html