1993 Jeep Cherokee
1993 GENERAL SERVICING
Compressor Refrigerant Oil Checking
Chrysler Motors
* PLEASE READ THIS FIRST *
NOTE: For compressor application, see COMPRESSOR APPLICATIONS &
BODY DESIGNATIONS in this article. DO NOT exceed A/C system refrigerant oil capacity when servicing system. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS in this article.
REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS
NOTE: Due to late changes, always refer to underhood A/C
Specification Label in engine compartment or A/C compressor label while servicing A/C system. If A/C Specification Label and specifications in table differ, use label specifications.
REFRIGERANT OIL & REFRIGERANT CAPACITY TABLE (CARS)
(1) Oil Refrigerant
Application Ounces Ounces
Chrysler Corp.
All FWD Cars (2) 7.3 32
Concorde, Intrepid
& Vision 5.0 28
Laser & Talon 5.0 33
- Total system capacity, unless otherwise noted.
- With fixed displacement compressor. Use 8.7 ounces with
variable displacement compressor.
REFRIGERANT OIL & REFRIGERANT CAPACITY TABLE (LIGHT TRUCKS & VANS)
(1) Oil Refrigerant
Application Ounces Ounces
Chrysler Corp. (Except Jeep)
Dakota 4.6 44
FWD Vans (2)
With Rear Unit 13.4 50
Without Rear Unit 6.7 36
Pickup & Ramcharger 4.6 44
RWD Vans
With Rear Unit 9.3 65
Without Rear Unit 7.3 45
Jeep
Cherokee 4.6 38
Grand Cherokee (2) 8.0 28
Wrangler 4.6 32
- Total system capacity, unless otherwise noted.
- Models use R-134a refrigerant and PAG (ND8) Refrigerant Oil
(Part No. 82300102).
(3) - Models with auxiliary unit may require additional
refrigerant. See decal under hood for capacity.
- Series codes are determined by fifth character of VIN code.
- Models use PAG Refrigerant Oil (Part No. 12345923) and
R-134a refrigerant.
COMPRESSOR APPLICATIONS
NOTE: Due to late changes, always refer to underhood A/C
Specification Label in engine compartment or A/C compressor label while servicing A/C system. If A/C Specification Label and specifications differ, use label specifications.
COMPRESSOR APPLICATIONS TABLE (CARS)
Application
Chrysler Corp.
Concorde, Intrepid, Laser,
Talon & Vision
Except Concorde, Intrepid, Laser, Talon & Vision . .
Compressor
Nippondenso 10PA17 10-Cyl.
Nippondenso 6C-17 6-Cyl.,
Nippondenso 10PA17 10-Cyl.,
Sanden TR-105 10-Cyl.,
Sanden SD-709P 7-Cyl.
(1) - Body codes are determined by fourth character of VIN code.
COMPRESSOR APPLICATIONS TABLE (LIGHT TRUCKS & VANS)
Application Compressor
Chrysler Corp. (Except Jeep)
Dakota, Pickup & Ramcharger Sanden SD-709 7-Cyl.
FWD Vans Nippondenso 10PA17 10-Cyl.
RWD Vans Sanden TR-105 10-Cyl.
Jeep
Cherokee & Wrangler Sanden SD-709 7-Cyl.
Grand Cherokee Nippondenso 10PA17 10-Cyl.
(1) - Series codes are determined by fifth character of VIN code.
BODY DESIGNATIONS
BODY DESIGNATIONS TABLE (CHRYSLER CORP. CARS)
Body Designation (1) Model
"A" Body Acclaim, LeBaron Sedan & Spirit
"C" Body Dynasty & New Yorker
"G" Body Daytona
"J" Body LeBaron Convertible/Coupe
"LH" Body Concorde, Intrepid & Vision
"P" Body Shadow & Sundance
"S" Body Laser & Talon
"Y" Body Fifth Avenue & Imperial
(1) - Body codes are determined by fifth character of VIN code.
BODY DESIGNATIONS TABLE (CHRYSLER CORP. LIGHT TRUCKS & VANS)
Model Designation
Caravan "D" & "K" Series
Dakota "N" Series
Pickups (Full Size) "D" & "W" Series
Ramcharger "AD" & "AW" Series
Town & Country "Y" Series
Vans (Full Size) "B" Series
Voyager "H" & "P" Series
REFRIGERANT OILS
Only NEW, pure, moisture-free refrigerant oil should be used in A/C systems. This oil is highly refined with a very low moisture content. Oil container must be tightly closed when not in use, or moisture from air will be absorbed into refrigerant oil.
Refrigerant R-12 based systems use mineral oil, while R-134a systems use synthetic/Polyalkylene Glycol (PAG) oil. Using a mineral oil based lubricant with R-134a systems will result in A/C compressor failure due to lack of proper lubrication.
Use ONLY specified oil for the appropriate system and A/C compressor. Always check the underhood A/C specification label or A/C compressor label before adding refrigerant oil to A/C compressor/system. The following types of R-134a refrigerant oil are currently available.
Chrysler/Jeep/Eagle
PAG (ND8) Refrigerant Oil (82300102)
NOTE: Synthetic/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.
SERVICING PRECAUTIONS
DISCHARGING SYSTEM
If compressor has stem-type service valves, it can be isolated and removed without discharging entire system. Otherwise, discharge A/C system using approved refrigerant recovery/recycling equipment before loosening any fittings.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all fittings to be opened. Always use 2 wrenches when loosening or tightening fittings. Some refrigerant lines are connected with a coupling. Special tools may be required to disconnect lines. Cap all openings as soon as lines are removed. DO NOT remove caps until ready to connect lines and fittings.
NOTE: All R-134a based systems use 1/2-16 ACME threaded fittings. Ensure all replacement parts match the connections of the system being worked on.
CONNECTING LINES & FITTINGS
Always use NEW gasket or "O" ring when connecting lines or fittings. Coat "O" ring with refrigerant oil, and ensure it is not
twisted during installation. To prevent damage to lines and fittings, always use 2 wrenches.
PLACING SYSTEM IN OPERATION
After component service or replacement has been completed, evacuate system thoroughly with a vacuum pump. Charge system with proper amount of refrigerant. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS in this article. Perform leak test. After system has been leak tested, check system operation.
NOTE: A/C systems normally will not need additional refrigerant oil unless oil loss has occurred due to ruptured lines, leaking compressor seals, compressor overhaul or component replacement.
CHECKING COMPRESSOR OIL
NIPPONDENSO 6C-17 6-CYLINDER
Slowly
discharge system using approved refrigerant
recovery/recycling
equipment. Disconnect refrigerant hoses at
compressor. Remove
compressor bolts and compressor.
Remove
suction port on top of compressor, and drain oil.
Add
proper amount of refrigerant oil to compressor (total
system
capacity minus amount retained
in components that have not been
replaced). See
6C-17 COMPONENT REFRIGERANT OIL CAPACITIES table. See
REFRIGERANT
OIL & REFRIGERANT SPECIFICATIONS in
this article for total
system capacity.
Install
compressor. Evacuate and recharge A/C system.
Perform leak test.
6C-17 COMPONENT REFRIGERANT OIL CAPACITIES
TABLE
Component Ounces
Condenser 1
Evaporator
Front 2
Rear (If Equipped) 2
Receiver-Drier 1
NIPPONDENSO 10PA17 10-CYLINDER
Chrysler Motors (Laser & Talon)
Add specified amount if components are replaced. See 10PA17 COMPONENT REFRIGERANT OIL CAPACITIES table.
Chrysler Motors (Except Laser & Talon)
Slowly
discharge system using approved refrigerant
recovery/recycling
equipment. Disconnect refrigerant hoses at
compressor. Remove
compressor bolts and compressor.
Remove
suction port on top of compressor, and drain oil.
Add
proper amount of refrigerant oil to compressor (total
system
capacity minus amount retained
in components that have not been
replaced). See 10PA17 COMPONENT
REFRIGERANT OIL CAPACITIES table. See
REFRIGERANT
OIL & REFRIGERANT SPECIFICATIONS in
this article for total
system capacity.
Install
compressor. Evacuate and recharge A/C system.
Perform leak test.
10PA17 COMPONENT REFRIGERANT OIL CAPACITIES TABLE
Component
Ounces
Laser & Talon
Compressor 1
Condenser 2/3
Evaporator 1
Receiver-Drier 1/3
Refrigerant Lines 1/3
Except Laser & Talon
Condenser 1
Evaporator
Front 2
Rear (If Equipped) 2
Receiver-Drier 1
SANDEN SD-709 & SD-709P 7-CYLINDER
Start
and operate engine at high idle with A/C on for 15
minutes.
Stop engine. Connect manifold gauge set to compressor
service
valves. Ensure valves on gauge
set are closed. Place both valves on
compressor in mid position.
Start engine, and operate A/C.
Slowly
turn compressor suction valve clockwise toward
closed
(front-seated) position. When suction pressure is reduced to
zero,
turn engine and compressor off, and quickly turn suction valve
stem
inward to full front-seated position. Turn discharge valve
into
front-seated position.
Loosen
oil level plug to release internal pressure in
compressor.
Compressor is now isolated from rest of system, and
service
valves can be removed from compressor.
Remove
compressor oil plug. Look through oil fill plug
hole,
and rotate compressor crankshaft to allow Dipstick (6465) to
be
fully inserted. Insert Dipstick
(6465), and measure oil. See Fig. 1.
Each
mark on dipstick represents one increment.
17493
Fig. 1: Checking Compressor Oil Level Courtesy of Sanden International U.S.A., Inc.
5) Place angle gauge across flat areas on mounting ears. Determine amount of oil needed based on mounting angle. See SD-709 &
SD-709P COMPRESSOR OIL INCREMENT CAPACITIES table.
6) If necessary, correct compressor oil level. Install compressor oil plug, and tighten it to 72-108 INCH lbs. (8-12 N.m). Evacuate and recharge A/C system. Perform leak test.
SD-709 & SD-709P
COMPRESSOR OIL INCREMENT CAPACITIES TABLE
Mounting
Angle Oil Level
(Increments)
0 3-5
10 4-6
20 5-7
30 6-8
40 7-9
50 8-10
60 9-11
90 10-12
SANDEN TR-105 10-CYLINDER
Slowly
discharge system using approved refrigerant
recovery/recycling
equipment. Disconnect refrigerant hoses at
compressor. Remove
compressor bolts and compressor.
Remove
suction port on top of compressor, and drain oil.
When repairing
A/C systems with excessive leak(s), add additional oil.
Add
proper amount of refrigerant oil to compressor (total
system
capacity minus amount retained in components that have not
been
replaced). See TR-105 COMPONENT
REFRIGERANT OIL CAPACITIES table. See
REFRIGERANT
OIL & REFRIGERANT SPECIFICATIONS in
this article for total
system capacity.
Install
compressor. Evacuate and recharge A/C system.
Perform leak test.
TR-105 COMPONENT REFRIGERANT OIL CAPACITIES
TABLE
Component Ounces
Condenser 1
Evaporator
Front 2
Rear (If Equipped) 2
Receiver-Drier 1
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