2003 FORD MUSTANG air filter

A/C Evaporator Core
NOTE:
The evaporator core is not separately serviceable, it is serviced only with the evaporator core
housing assembly.
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning
system except when there is physical evidence of contamination from a failed A/C compressor or
damage to the suction accumulator.
The A/C evaporator core is the plate/fin type with a unique refrigerant flow path.
zA mixture of refrigerant and oil enters the bottom of the A/C evaporator core through the A/C
evaporator core inlet tube and moves out of the A/C evaporator core through the A/C
evaporator core outlet tube.
z This flow pattern accelerates the flow of refrigerant and oil through the A/C evaporator core.
Evaporator Core Orifice
NOTE: The evaporator core orifice is an integral part of the condenser to evaporator line and should
be installed as an assembly with the line.
NOTE: A new evaporator core orifice should be installed whenever a new A/C compressor is installed.
The evaporator core orifice has the following characteristics:
zIt is located in the A/C condenser to evaporator line.
z It has filter screens located on the inlet and outlet ends of the tube body.
z The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the evaporator
core orifice.
z O-ring seals on the evaporator core orifice prevent the high- pressure liquid refrigerant from
bypassing the evaporator core orifice. Klj . 5 ba
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z
Adjustment or repair cannot be made to the evaporator core orifice assembly. A new evaporator
core orifice must be installed as a unit.
Suction Accumulator
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning
system except when there is physical evidence of contamination from a failed A/C compressor or
damage to the suction accumulator.
In addition to the preceding condition, a new suction accumulator should be installed if one of the
following conditions exist:
zThe suction accumulator is perforated.
z The refrigerant system has been opened to the atmosphere for a period of time longer than
required to make a minor repair.
z There is evidence of moisture in the system such as internal corrosion of metal refrigerant lines
or the refrigerant oil is thick and dark. Item Part Number Description
1 19E561 A/C cycling switch
2 — O-
ring seal (part of 19C836) 3 19D701 Low pressure service gauge port valve
4 — Inlet from A/C evaporator core (part of 19C836)
5 — Outlet to A/C compressor (part of 19C836)
6 — Anti-
siphon hole (part of 19C836) 7 — Desiccant bag (part of 19C836)
8 — Oil return orifice filter (part of 19C836)
9 — Vapor return tube (part of 19C836)
10 — Suction accumulator dome (part of 19C836) Klj . 6 ba
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The suction accumulator (19C836) is mounted to the A/C accumulator bracket (19D606) to the right of
the vehicle centerline. The inlet tube of the suction accumulator attaches directly to the A/C evaporator
core outlet tube and the outlet tube attaches to the A/C manifold and tube.
After entering the inlet of the suction accumulator, the heavier oil-
laden refrigerant contacts an
internally mounted dome (which serves as an umbrella) and drips down onto the bottom of the
canister.
zA small diameter oil bleed hole, in the bottom of the vapor return tube, allows the accumulated
heavier liquid refrigerant and oil mixture to reenter the compressor suction line at a controlled
rate.
z As the heavier mixture passes through the small diameter liquid bleed hole, it has a second
chance to vaporize and recirculate through the A/C compressor without causing compressor
damage due to slugging.
z A fine mesh screened filter fits tightly around the bottom of the vapor return tube to filter out
refrigerant system contaminant particles.
z A desiccant bag is mounted inside the canister to absorb any moisture which may be in the
refrigerant system.
z A fitting located on the top of the suction accumulator is used to attach the A/C cycling switch. A
long- travel Schrader- type valve stem core is installed in the fitting so that the A/C cycling switch
can be removed without discharging the A/C system.
A/C Cycling Switch
The A/C cycling switch is mounted on a Schrader- type valve fitting on the top of the suction
accumulator.
zA valve depressor, located inside the threaded end of the A/C cycling switch, presses in on the
Schrader valve stem.
z This allows the suction pressure inside the suction accumulator to control the operation of the
A/C cycling switch.
z The electrical switch contacts open when the suction pressure drops. The contacts close when
the suction pressure rises. For specifications regarding operating pressure(s), refer to Section 412 - 00 .
z The A/C cycling switch will control the A/C evaporator core pressure at a point where the
plate/fin surface temperature will be maintained slightly above freezing.
z This prevents icing of the A/C evaporator core and blockage of air flow.
z It is not necessary to discharge the refrigerant system to remove the A/C cycling switch.
Dual- Function Pressure Switch (4.6L)
The dual- function pressure switch is used to interrupt A/C compressor operation in the event of high Klj . 7 ba
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REMOVAL AND INSTALLATION
Air Conditioning (A/C) Compressor —
3.8L
Removal and Installation CAUTION: If installing a new air conditioning compressor due to an internal failure of the
old unit, you must carry out the following procedures to remove contamination from the air
conditioning system.
zIf A/C flushing equipment is available, carry out the flushing of the air conditioning
system prior to installing a new air conditioning compressor. For additional information,
refer to Section 412 - 00 .
z If A/C flushing equipment is not available, carry out filtering of the air conditioning
system after a new air conditioning compressor has been installed. For additional
information, refer to Section 412 - 00 .
z Install a new evaporator core orifice (19D990), as directed by the A/C flushing or filtering
procedure.
z Install a new suction accumulator (19C836), as directed by the A/C flushing or filtering
procedure.
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning
system except when there is physical evidence of system contamination from a failed A/C compressor
or damage to the suction accumulator.
1. If flushing of the air conditioning system has not been performed, recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Disconnect the battery. For additional information, refer to Section 414 - 01
3. Unlatch the air breather.
SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
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9. Remove the bolts and the A/C compressor.
10. To install, reverse the removal procedure. zInstall new O- ring seals lubricated in clean PAG oil.
z If filtering of the refrigerant system is not to be performed, lubricate the refrigerant system
with the correct amount of clean PAG oil. For additional information, refer to Section 412 -
00 .
11. If filtering of the air conditioning system is not to be performed, evacuate, leak test and charge the refrigerant system. For additional information, refer to Section 412 - 00 . Klj . 3 ba
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REMOVAL AND INSTALLATION
Air Conditioning (A/C) Compressor —
4.6L
Removal and Installation CAUTION: If installing a new air conditioning compressor due to an internal failure of the
old unit, you must carry out the following procedures to remove contamination from the air
conditioning system.
zIf A/C flushing equipment is available, carry out the flushing of the air conditioning
system prior to installing a new air conditioning compressor. For additional information,
refer to Section 412 - 00 .
z If A/C flushing equipment is not available, carry out filtering of the air conditioning
system after a new air conditioning compressor has been installed. For additional
information, refer to Section 412 - 00 .
z Install a new evaporator core orifice (19D990), as directed by the A/C flushing or filtering
procedure.
z Install a new suction accumulator (19C836), as directed by the A/C flushing or filtering
procedure.
NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning
system except when there is physical evidence of system contamination from a failed A/C compressor
or damage to the suction accumulator.
1. If flushing of the air conditioning system has not been performed, recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Remove the drive belt from the A/C compressor pulley.
3. Raise the vehicle. For additional information, refer to Section 100 - 02 .
4. Disconnect the A/C compressor electrical connector. SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
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