1999 DODGE RAM oil type
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system. If A/C specification label and specifications in this
article differ, use underhood label specifications.
REFRIGERANT OIL & R-134a REFRIGERANT CAPACITY (CARS)
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Application ( 1) Oil Oz. Refrigerant Oz.
Chrysler Corp.
Avenger & Sebring Coupe
2.0L (DOHC) ...................... 2.7-4.1 ......... 24.7-26.1\
2.5L (SOHC) ...................... 5.7-6.4 ......... 24.7-26.1\
Breeze, Cirrus & Stratus ............. 5.0 ................ 20.0
Concorde, Intrepid, LHS & 300M ....... 5.0 ................ 28.0
Neon ................................. 6.8 ................ 28.0
Sebring Convertible .................. 5.0 ................ 20.0
Ford Motor Co.
Continental .......................... 7.0 ................ 34.0
Contour, Cougar & Mystique ........... ( 1) ................. ( 1)
Crown Victoria & Grand Marquis ....... 7.0 ................ 38.0
Escort, Coupe & Tracer ............... 7.0 ................ 28.0
Mustang .............................. 7.0 ................ 34.0
Sable & Taurus ....................... 7.0 ................ 34.0
Town Car ............................. 7.0 ................ 38.0
General Motors
"C" Body ............................. 9.0 ................ 32.0
"E" & "K" Bodies ................ ( 1) 8.0-9.0 ............. 32.0
"F" Body ............................. 9.0 ................ 24.0
"G" Body
With HD6/HT6 Compressor ............ 8.0 ................ 32.0
With V5 Compressor ................. 9.0 ................ 32.0
"H" Body ............................. 9.0 ................ 32.0
"J" Body ............................. 9.0 ................ 24.0
"M" Body ............................. 3.4 ........... 19.0-21.0
"N" Body ............................. 9.0 ................. ( 2)
"S" Body ......................... ( 3) 4.1 ........... 22.9-26.5
"V" Body ............................. 9.0 ................ 33.5
"W" Body ............................. 9.0 ................ 30.0
"Y" Body ............................. 9.0 ................ 24.0
"Z" Body ............................. 5.0 ................ 24.0
( 1) - Total system capacity, unless otherwise noted. Refer to
underhood A/C specification label in engine compartment for
specified oil type.
( 2) - Refrigerant capacity for Alero and Grand Am is 36.0 ounces.
Refrigerant capacity for Cutlass and Malibu is 28.0 ounces.
( 3) - Compressor oil capacity.
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REFRIGERANT OIL & R-134a REFRIGERANT CAPACITY (LIGHT TRUCKS & VANS) \
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Application ( 1) Oil Oz. Refrigerant Oz.
Chrysler Corp.
Caravan, Town & Country, & Voyager
Without Rear Unit ................... 9.0 ............... 34.0
With Rear Unit ..................... 13.4 ............... 44.0
Dakota ................................ 8.1 ............... 28.0
Durango
Without Rear Unit ................... 5.5 ............... 28.0
With Rear Unit ...................... 8.0 ............... 30.0
Ram Pickup ............................ 8.1 ............... 30.0
Ram Van/Wagon
Without Rear Unit ................... 8.0 ............... 34.0
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With Rear Unit ..................... 10.0 ............... 46.0
Ford Motor Co.
"E" Series
With Rear Unit ..................... 13.0 ............... 64.0
Without Rear Unit ................... 9.0 ............... 44.0
Expedition & Navigator ................ (2) ................ ( 2)
Explorer & Mountaineer ................ 7.0 ............... 30.0
F150/F250 Pickup ...................... 9.0 ............... 32.0
F250HD/F350 Pickup .................... 9.0 ............... 32.0
Ranger ................................ 7.0 ............... 30.0
Villager
With Rear Unit ..................... 11.0 ............... 56.0
Without Rear Unit ................... 7.0 ............... 32.0
Windstar
With Rear Unit ..................... 13.0 ............... 56.0
Without Rear Unit ................... 9.0 ............... 44.0
General Motors
"C" & "K" Series
Pickup & Sierra ..................... 8.0 ............... 32.0
Crew Cab & Utility .................. 8.0 ............... 36.0
Suburban, Tahoe & Yukon
With Rear Unit ..................... 11.0 ............... 64.0
Without Rear Unit ................... 8.0 ............... 36.0
"G" Series
With Rear Unit ..................... 11.0 ............... 78.0
Without Rear Unit ................... 8.0 ............... 48.0
"J" Series ............................ 3.4 ............... 21.0
"L" & "M" Series
With Rear Unit ..................... 11.0 ............... 48.0
Without Rear Unit ................... 8.0 ............... 32.0
"P" Series ............................ 8.0 ................ ( 2)
"S" & "T" Series
2.2L ................................ 9.0 .......... 30.0-32.0
4.3L ................................ 8.0 .......... 30.0-32.0
"U" Series
With Rear Unit ..................... 11.0 ............... 46.0
Without Rear Unit ................... 8.0 ............... 32.0
Jeep
Cherokee .............................. 8.1 ............... 20.0
Grand Cherokee ........................ 5.8 ............... 24.0
Wrangler .............................. 8.1 ............... 20.0
( 1) - Total system capacity, unless otherwise noted. Refer to
underhood A/C specification label in engine compartment for
specified oil type.
( 2) - Refrigerant oil and/or refrigerant capacity not available from
manufacturer. Refer to underhood A/C specification label in
engine compartment.
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REFRIGERANT OILS
* PLEASE READ THIS FIRST *
NOTE: Use ONLY the specified oil for the A/C system or compressor.
Always check the underhood A/C specification label or A/C
compressor label before adding refrigerant oil to A/C
compressor/system.
NOTE: For compressor applications, see COMPRESSOR APPLICATIONS &
BODY DESIGNATIONS. DO NOT exceed A/C system refrigerant oil
capacity when servicing system. See CAPACITIES.
Page 63 of 1691
Connector missing ....... C ............ Require replacement.
Inoperative ............. A ........ (2) Require replacement.
Insulation overheated ... A ............ Require replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Inoperative includes intermittent operation or out of
OEM specification.
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BLOWER SWITCHES
See SWITCHES.
CABIN AIR FILTERS
CABIN AIR FILTER INSPECTION \
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Condition Code Procedure
Air flow obstruction .... A ............. Require cleaning or
replacement.
Maintenance intervals ... 3 ............ Suggest replacement.
Missing ................. C ............ Require replacement.
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CIRCUIT BREAKERS
See FUSES, FUSIBLE LINKS AND CIRCUIT BREAKERS .
COMPRESSOR CLUTCH ASSEMBLIES
COMPRESSOR CLUTCH ASSEMBLY INSPECTION \
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Condition Code Procedure
Air gap incorrect ....... B .. Require repair or replacement.
Bearing seized .......... A .. Require replacement of bearing
or assembly.
Bearing worn, affecting
performance ............ A .. Require replacement of bearing
or assembly.
Coil shows signs of
overheating ............ 1 .... Suggest replacement of coil.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted,
Page 65 of 1691
Bracket broken, affecting
performance ............ A ............ Require replacement.
Bracket broken, not
affecting performance .. .. ........ No service suggested or
required.
Bracket corroded,
affecting performance .. A .. Require repair or replacement.
Bracket corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Bracket cracked, affecting
performance ............ A .. Require repair or replacement.
Bracket cracked, not
affecting performance .. 1 .. Suggest repair or replacement.
Bracket holes elongated,
affecting performance .. A .. Require repair or replacement.
Bracket holes elongated,
not affecting
performance ............ .. ........ No service suggested or
required.
Bracket loose, affecting
performance ............ A .. Require repair or replacement.
Bracket loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Bracket missing ......... C ............ Require replacement.
Housing broken, affecting
performance ............ A .. Require repair or replacement.
Housing broken, not
affecting performance .. .. ........ No service suggested or
required.
Housing cracked, affecting
performance ............ A .. Require repair or replacement.
Housing cracked, not
affecting performance .. 1 .. Suggest repair or replacement.
Inoperative ............. A ........... (1) Require repair or
replacement.
Leaking ................. A .. Require repair or replacement.
Noisy ................... 2 ........... ( 2) Suggest repair or
replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Tubing connection
leaking ................ A .. Require repair or replacement.
( 1) - Inoperative includes intermittent operation or out of
OEM specification.
( 2) - Compressor noise can also be caused by low oil level,
state of charge, air contamination, or type of
refrigerant.
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CONDENSER AIR SEALS
CONDENSER AIR SEAL INSPECTION \
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Condition Code Procedure
Leaking ................. A . Require repair or replacement.
Missing ................. C ........... Require replacement.
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CONDENSER FAN MOTORS
Page 82 of 1691
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Contaminated, affecting
performance ............ A ............ Require replacement.
Dessicant bag
deteriorated ........... A ........ (1) Require replacement.
Further inspection required.
Dessicant at the end of
its useful life (saturated
with moisture) ......... 1 .. Suggest repair or replacement.
Fusible plug leaking .... A .... Require replacement of plug.
Leaking ................. A ............ Require replacement.
Pressure relief device
leaking ................ A . Require replacement of pressure
relief device.
Restricted .............. A .. Require repair or replacement.
Sight glass no longer
transparent ............ 2 ... Suggest replacement of drier.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Tubing connection
leaking ................ A .. Require repair or replacement.
( 1) - Inspect system to determine effects of dessicant bag
deterioration.
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REFRIGERANT
NOTE: Refrigerants include any SNAP (Significant New Alternative
Policy)-approved blends.
REFRIGERANT INSPECTION
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Condition Code Procedure
Contaminated (other than
refrigerant blends) .... B ........ Require service to remove
contamination.
Different types of
refrigerants in the same
system (other than
refrigerant blends) .... B ................. Require repair.
Overcharged ............. B ................. Require repair.
Refrigerant type
does not match
fittings and label ..... B ................. Require repair.
Undercharged ............ B ................. Require repair.
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REFRIGERANT OIL
REFRIGERANT OIL INSPECTION \
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Condition Code Procedure
Contaminated ............ 1 .. Require repair or replacement.
Overfilled .............. B ................. Require repair.
Page 92 of 1691
A/C -H EA TE R S YSTE M
1999 D odge P ic ku p R 1500
1999 MANUAL A/C-HEATER SYSTEMS
CHRYSLER
Dakota, Durango & Ram Pickup
SPECIFICATIONS
SPECIFICATIONS \
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Application Specification
Compressor Type .............................. Sanden SD-7H15 7-Cyl.
Compressor Belt Tension ........................................ ( 1)
Refrigerant (R-134a) Capacity
With Rear A/C Unit ....................................... 30 ozs.
Without Rear A/C Unit .................................... 28 ozs.
System Oil Capacity
Dakota & Ram Pickup ................................. ( 2) 8.1 ozs.
Durango
With Rear A/C Unit ................................. ( 2) 8.0 ozs.
Without Rear A/C Unit .............................. ( 2) 5.5 ozs.
System Operating Pressures ( 3)
High Side ......................... 190-220 psi (13.4-15.5 kg/cm
)
Low Side .............................. 32-40 psi (2.2-2.8 kg/cm)
( 1) - Dynamic tensioner automatically adjusts belt. Tension is okay if
indicator is within marked limits on belt tensioner.
( 2) - Use SP-20 PAG refrigerant oil.
( 3) - Measured at ambient air temperature of 80
F (27C). \
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WARNING: To avoid injury from accidental air bag deployment, read and
carefully follow all SERVICE PRECAUTIONS and DISABLING &
ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY
article.
CAUTION: When battery is disconnected, radio will go into anti-theft
protection mode. Obtain radio anti-theft protection code from
owner prior to servicing vehicle.
DESCRIPTION
These systems are a blend-air type. Outside air enters
through a cowl at base of the windshield and flows through a plenum
chamber into blower housing. Airflow velocity is controlled by blower
speed selector switch. Air flows across evaporator and is directed by
a blend-air door to go either through or by-pass the heater core.
On Dakota and Durango, temperature control cable operates
blend-air door and allows immediate control of outlet air temperature.
It also controls operation of recirculation door. On Ram Pickup,
temperature is regulated by a blend-air servo motor controlled from
A/C-heater control panel rotary temperature dial. On all models, mode
selector switch controls vacuum-operated doors to direct conditioned
air to selected outlets.
Durango may also be equipped with an optional rear A/C unit.
The rear A/C unit consists of a blower motor and evaporator. It will
only operate while the front A/C is on. The optional rear A/C-heater
unit is controlled using fan and temperature switches.
Page 130 of 1691
of underhood labels with R-134a refrigerant clearly printed on labels.
See Fig. 2 . The underhood label used on Ford Motor Co. vehicles is
Yellow. See Fig. 3. Most manufacturers will identify refrigerant type
with labels affixed to compressor. Before servicing an A/C system,
always determine which refrigerant is being used.
Fig. 2: Underhood Refrigerant Identification Labels (Typical)
Courtesy of chrysler corp.
Fig. 3: Underhood Refrigerant Identification Label (Typical)
Courtesy of ford motor co.
REFRIGERANT OILS
Page 131 of 1691
Refrigerant R-12 based systems use mineral oil, while R-134a
systems use synthetic Polyalkylene Glycol (PAG) oils. Using a mineral
oil based lubricant with R-134a will result in A/C compressor failure
due to lack of proper lubrication.
Following are the most common R-134a refrigerant oils used by
most domestic vehicles:
Chrysler Corp., Eagle & Jeep
Use ND-8 PAG oil, SUN PAG 56 oil, SP-10 PAG Oil, or SP-20 PAG
oil.
Ford Motor Co.
Use YN-12B or YN-12C PAG Refrigerant Oil (specification WSH-
M1C231-B) or SP-20 PAG Oil (specification WST-M1C231-B2).
General Motors
On all models except Saturn, use PAG Refrigerant Oil (Part
No. 12345923). On Saturn, use Saturn PAG refrigerant oil.
NOTE: PAG oil absorbs moisture very rapidly, 2.3-5.6 percent by
weight as compared to a mineral oil absorption rate of .005
percent by weight.
NOTE: Use ONLY the specified oil for the appropriate system or A/C
compressor. Always check the underhood A/C specification
label or A/C compressor label before adding refrigerant oil
to A/C system.
SYSTEM SERVICE VALVES
SCHRADER-TYPE VALVES
NOTE: Although similar in construction and operation to a tire
valve, NEVER replace a Schrader-type valve with a tire
valve.
Schrader valve is similar in construction and operation to a
tire valve. See Fig. 4. When a test gauge hose is attached (hose has
built-in valve core depressor), Schrader stem is pushed inward to the
open position and allows system pressure to reach the gauge.
If test hose being used does not have a built-in core
depressor, an adapter must be used. Never attach hoses or adapters to
a Schrader valve unless it is first connected to manifold gauge set.
Fig. 4: Schrader Service Valve (Compressor Location Shown)
SPECIAL VALVE CONNECTORS
On some General Motors models, thread size on high-side