B-Pillar Refrigerant Line - Dodge 2000 DURANGO Service Manual

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REMOVAL AND INSTALLATION (Continued)
as a fitting is loosened, tighten the fitting and
recover the refrigerant from the system again.
Do not discharge refrigerant into the atmosphere.
Use an R-134a refrigerant recovery/recycling device
that meets SAE Standard J2210.
The refrigerant system will remain chemically sta-
ble as long as pure, moisture-free R-134a refrigerant
and refrigerant oil is used. Dirt, moisture, or air can
upset this chemical stability. Operational troubles or
serious damage can occur if foreign material is
present in the refrigerant system.
When it is necessary to open the refrigerant sys-
tem, have everything needed to service the system
ready. The refrigerant system should not be left open
to the atmosphere 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 to be installed.
All tools, including the refrigerant recycling equip-
ment, the manifold gauge set, and test hoses should
be kept clean and dry. All tools and equipment must
be designed for R-134a refrigerant.

B-PILLAR REFRIGERANT LINE

The B-pillar refrigerant lines are used only on
models with the optional rear overhead A/C unit.
Both the B-pillar suction line and the B-pillar liquid
line are available for separate service replacement.
Each line may be removed independently from the
vehicle for service.
Any kinks or sharp bends in the refrigerant plumb-
ing will reduce the capacity of the entire air condi-
tioning system. Kinks and sharp bends reduce the
flow of refrigerant in the system. High pressures are
produced in the refrigerant system when the air con-
ditioning compressor is operating. Extreme care must
be exercised to make sure that each of the refriger-
ant system connections is pressure-tight and leak
free.
WARNING: REVIEW THE WARNINGS AND CAU-
TIONS IN THE GENERAL INFORMATION SECTION
NEAR THE FRONT OF THIS GROUP BEFORE PER-
FORMING THE FOLLOWING OPERATION.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Recover the refrigerant from the refrigerant
system. See Refrigerant Recovery in the Service Pro-
cedures section of this group.
(3) Raise and support the vehicle.
(4) From under the vehicle, disconnect the under-
body liquid line refrigerant line coupler at the B-pil-
lar liquid line and the underbody suction line
HEATING AND AIR CONDITIONING
refrigerant line coupler at the B-pillar suction line.
See Refrigerant Line Coupler in the Removal and
Installation section of this group for the procedures.
Install plugs in, or tape over all of the opened refrig-
erant line fittings.
(5) Lower the vehicle.
(6) Remove the headliner from the passenger com-
partment of the vehicle. Refer to Group 23 - Body for
the procedures. The B-pillar upper and lower trim
must be removed.
(7) From the passenger compartment, remove the
fasteners that secure the block fittings at the top of
the B-pillar refrigerant lines to the rear overhead
A/C unit (nut from stud - liquid line) (nut and bolt -
suction line), and disengage the fittings (Fig. 13).
Install plugs in, or tape over all of the opened refrig-
erant line fittings.
Fig. 13 Rear Overhead A/C Unit Refrigerant Line
Remove/Install
1 – B-PILLAR SUCTION LINE
2 – B-PILLAR LIQUID LINE
3 – OVERHEAD AIR CONDITIONING UNIT
4 – NUT
5 – STUD
6 – BOLT
7 – NUT
(8) Remove the two screws that secure the B-pillar
refrigerant line clamps to the B-pillar (Fig. 14).
(9) Remove the two screws that secure the B-pillar
refrigerant line clamp and seal unit to the floor panel
at the base of the B-pillar.
(10) Tilt the top of the B-pillar refrigerant line
unit towards the front of the vehicle far enough so
that the lower end of the unit can be lifted out
through the hole in the floor panel.
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