system components. A barrier hose design with a
nylon tube, which is sandwiched between rubber lay-
ers, is used for the R-134a air conditioning system on
this vehicle. This nylon tube helps to further contain
the R-134a refrigerant, which has a smaller molecu-
lar structure than R-12 refrigerant. The ends of the
refrigerant hoses are made from lightweight alumi-
num or steel, and commonly use braze-less fittings.
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. A good rule for the
flexible hose refrigerant lines is to keep the radius of
all bends at least ten times the diameter of the hose.
In addition, the flexible hose refrigerant lines should
be routed so they are at least 80 millimeters (3
inches) from the exhaust manifold.
OPERATION
High pressures are produced in the refrigerant sys-
tem when the air conditioning compressor is operat-
ing. Extreme care must be exercised to make sure
that each of the refrigerant system connections is
pressure-tight and leak free. It is a good practice to
inspect all flexible hose refrigerant lines at least once
a year to make sure they are in good condition and
properly routed.
The refrigerant lines and hoses are coupled with
other components of the HVAC system with peanut-
block style fittings. A stat-O seal type flat steel gas-
ket with a captured compressible O-ring, is used to
mate plumbing lines with A/C components to ensure
the integrity of the refrigerant system.
The refrigerant lines and hoses cannot be repaired
and, if faulty or damaged, they must be replaced.
REFRIGERANT LINE COUPLERS
DESCRIPTION
Spring-lock type refrigerant line couplers are used
to connect many of the refrigerant lines and other
components to the refrigerant system. These couplers
require a special tool for disengaging the two coupler
halves.
OPERATION
The spring-lock coupler is held together by a garter
spring inside a circular cage on the male half of the
fitting (Fig. 5). When the two coupler halves are con-
nected, the flared end of the female fitting slips
behind the garter spring inside the cage on the male
fitting. The garter spring and cage prevent the flared
end of the female fitting from pulling out of the cage.
Two O-rings on the male half of the fitting are
used to seal the connection. These O-rings are com-
patible with R-134a refrigerant and must be replaced
with O-rings made of the same material.
Secondary clips are installed over the two con-
nected coupler halves at the factory for added blowoff
protection. In addition, some models have a plastic
ring that is used at the factory as a visual indicator
to confirm that these couplers are connected. After
the coupler is connected, the plastic indicator ring is
no longer needed; however, it will remain on the
refrigerant line near the coupler cage.
REFRIGERANT OIL
DESCRIPTION
The refrigerant oil used in R-134a refrigerant sys-
tems is a synthetic-based, PolyAlkylene Glycol (PAG),
wax-free lubricant. Mineral-based R-12 refrigerant
oils are not compatible with PAG oils, and should
never be introduced to an R-134a refrigerant system.
There are different PAG oils available, and each
contains a different additive package. The 10PA17
compressor used in this vehicle is designed to use an
ND-8 PAG refrigerant oil. Use only refrigerant oil of
this same type to service the refrigerant system.
OPERATION
After performing any refrigerant recovery or recy-
cling operation, always replenish the refrigerant sys-
tem with the same amount of the recommended
refrigerant oil as was removed. Too little refrigerant
Fig. 5 Spring-Lock Coupler - Typical
1 – MALE HALF SPRING-LOCK COUPLER
2 – FEMALE HALF SPRING-LOCK COUPLER
3 – SECONDARY CLIP
4 – CONNECTION INDICATOR RING
5 – COUPLER CAGE
6 – GARTER SPRING
7 – COUPLER CAGE
8 – “O” RINGS
24 - 8
HEATING AND AIR CONDITIONING
XJ
DESCRIPTION AND OPERATION (Continued)
Summary of Contents for Cherokee 2000
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Page 96: ...Fig 105 Gear Tooth Contact Patterns 3 60 TUBE 181 AND 186 FBI AXLE XJ ADJUSTMENTS Continued...
Page 100: ...Installer D 144 Installer W 262 3 64 TUBE 181 AND 186 FBI AXLE XJ SPECIAL TOOLS Continued...
Page 134: ...Fig 79 Gear Tooth Contact Patterns 3 98 194 RBI AXLE XJ ADJUSTMENTS Continued...
Page 166: ...Fig 59 Gear Tooth Contact Patterns 3 130 8 1 4 REAR AXLE XJ ADJUSTMENTS Continued...
Page 215: ...Fig 8 Clutch Components And Inspection XJ CLUTCH 6 5 DIAGNOSIS AND TESTING Continued...
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Page 647: ...Fig 16 2 5L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 23 DESCRIPTION AND OPERATION Continued...
Page 648: ...Fig 17 4 0L Engine 8W 90 24 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
Page 649: ...Fig 18 4 0L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 25 DESCRIPTION AND OPERATION Continued...
Page 662: ...Fig 31 Liftgate 8W 90 38 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
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Page 826: ...Fig 6 Frame Dimensions 13 8 FRAME AND BUMPERS XJ SPECIFICATIONS Continued...
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Page 1353: ...Fig 3 Hood Components XJ BODY 23 25 REMOVAL AND INSTALLATION Continued...
Page 1396: ...WELD LOCATIONS UPPER COWL 23 68 BODY XJ SPECIFICATIONS Continued...
Page 1397: ...UPPER COWL XJ BODY 23 69 SPECIFICATIONS Continued...
Page 1398: ...COWL 23 70 BODY XJ SPECIFICATIONS Continued...
Page 1399: ...A PILLAR XJ BODY 23 71 SPECIFICATIONS Continued...
Page 1400: ...A PILLAR 23 72 BODY XJ SPECIFICATIONS Continued...
Page 1401: ...A PILLAR XJ BODY 23 73 SPECIFICATIONS Continued...
Page 1402: ...A PILLAR 23 74 BODY XJ SPECIFICATIONS Continued...
Page 1403: ...B PILLAR XJ BODY 23 75 SPECIFICATIONS Continued...
Page 1404: ...D PILLAR 23 76 BODY XJ SPECIFICATIONS Continued...
Page 1405: ...FUEL FILLER OPENING XJ BODY 23 77 SPECIFICATIONS Continued...
Page 1406: ...CARGO AREA FLOOR PAN 23 78 BODY XJ SPECIFICATIONS Continued...
Page 1407: ...ROOF AND D PILLAR XJ BODY 23 79 SPECIFICATIONS Continued...
Page 1408: ...LIFTGATE OPENING 23 80 BODY XJ SPECIFICATIONS Continued...
Page 1409: ...ROOF XJ BODY 23 81 SPECIFICATIONS Continued...
Page 1410: ...ROOF 23 82 BODY XJ SPECIFICATIONS Continued...
Page 1411: ...FRAME RAIL XJ BODY 23 83 SPECIFICATIONS Continued...
Page 1412: ...FRAME RAIL 23 84 BODY XJ SPECIFICATIONS Continued...
Page 1413: ...FRAME RAIL XJ BODY 23 85 SPECIFICATIONS Continued...
Page 1414: ...FRAME RAIL 23 86 BODY XJ SPECIFICATIONS Continued...
Page 1415: ...REINFORCEMENT XJ BODY 23 87 SPECIFICATIONS Continued...
Page 1416: ...FRONT INNER FENDER 23 88 BODY XJ SPECIFICATIONS Continued...
Page 1417: ...FRONT INNER FENDER AND RADIATOR CLOSURE PANEL XJ BODY 23 89 SPECIFICATIONS Continued...
Page 1418: ...REINFORCEMENT 23 90 BODY XJ SPECIFICATIONS Continued...
Page 1419: ...FRONT FENDER XJ BODY 23 91 SPECIFICATIONS Continued...
Page 1420: ...BODY SIDE 23 92 BODY XJ SPECIFICATIONS Continued...
Page 1421: ...REAR WHEELHOUSE XJ BODY 23 93 SPECIFICATIONS Continued...
Page 1422: ...REAR INNER WHEELHOUSE 23 94 BODY XJ SPECIFICATIONS Continued...
Page 1423: ...BODY SIDE XJ BODY 23 95 SPECIFICATIONS Continued...
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Page 1429: ...UNDERBODY XJ BODY 23 101 SPECIFICATIONS Continued...
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Page 1440: ...BODY SEALING LOCATIONS APPLICATION METHODS 23 112 BODY XJ SPECIFICATIONS Continued...
Page 1441: ...COWL AND DASH PANEL XJ BODY 23 113 SPECIFICATIONS Continued...
Page 1442: ...DASH PANEL AND FLOOR PAN 23 114 BODY XJ SPECIFICATIONS Continued...
Page 1443: ...FLOOR PAN XJ BODY 23 115 SPECIFICATIONS Continued...
Page 1444: ...REAR INNER WHEELHOUSE 23 116 BODY XJ SPECIFICATIONS Continued...
Page 1445: ...FRONT INNER WHEELHOUSE XJ BODY 23 117 SPECIFICATIONS Continued...
Page 1446: ...BODY SIDE 23 118 BODY XJ SPECIFICATIONS Continued...
Page 1447: ...BODY SIDE XJ BODY 23 119 SPECIFICATIONS Continued...
Page 1448: ...BODY SIDE 23 120 BODY XJ SPECIFICATIONS Continued...
Page 1449: ...ROOF PANEL XJ BODY 23 121 SPECIFICATIONS Continued...
Page 1450: ...FUEL FILLER HOUSING 23 122 BODY XJ SPECIFICATIONS Continued...
Page 1451: ...LIFTGATE OPENING XJ BODY 23 123 SPECIFICATIONS Continued...
Page 1452: ...STRUCTURAL ADHESIVE LOCATIONS LEFT QUARTER PANEL 23 124 BODY XJ SPECIFICATIONS Continued...
Page 1453: ...REAR WHEELHOUSE XJ BODY 23 125 SPECIFICATIONS Continued...
Page 1454: ...ROOF BOWS 23 126 BODY XJ SPECIFICATIONS Continued...
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