1989-Mitsu-Factory Manual · AC system · страница 27 из 42 · Открыть оригинал PDF ↗
Open fittings with caution even after the system
has been discharged. If any pressure is noticed as
a fitting is loosened, allow trapped pressure to
bleed off very slowly. Never attempt to rebend
formed lines to fit. Use the correct line for the
installation you are servicing.
A good rule for the flexible hose lines is keep the
radius of all bends at least 10 times the diameter of
the hose.
Sharper bends will reduce the flow of refrigerant.
The flexible hose lines should be routed so that
they are at least 80 mm (3 in.) from the exhaust
manifold. It is good practice to inspect all flexible
hose lines at least once a year to make sure they
are in good condition and properly routed.
All plumbing connections use O-rings which are
not reusable.
O-RING INSTALLATION
(1) Clean sealing surface.
(2) Make sure O-ring does not have any scratches.
(3) Connect fitting, install fastener, and torque to amount
shown in illustration.
The internal part of the refrigeration system will remain in a
state of chemical stability as long as pure-moisture-free R-12
and refrigerant oil is used. Abnormal amounts of dirt, moisture
or air can upset the chemical stability and cause operational
troubles or even serious damage if present in more than
minute quantities.
When it is necessary to open the refrigeration system, have
everything you will need to service the system ready so the
system will not be left open any longer than necessary. Cap or
plug all lines and fittings as soon as they are opened to
prevent the entrance of dirt and moisture. All lines and
components in parts stock should be capped or sealed until
they are ready to be used.
All tools, including the refrigerant dispensing manifold, the
gauge set manifold and test hoses should be kept clean and
dry.
COMPRESSOR DRIVE BELT ADJUSTMENT rue.rma
Satisfactory performance of the air conditioning system is
dependent upon drive belt condition and tension. If the proper
tensions are not maintained, belt slippage will greatly reduce
air conditioning performance and drive belt life. To avoid such
adverse effects, the following service procedure should be
followed:
(1) Any belt that has operated for a minimum of one half-hour
is considered to be a “used” belt. Adjust air conditioning
drive belt at the time of new-car preparation.
(2) Check drive belt tension at regular service intervals and
adjust as needed.
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