Dodge Ram Truck 1500-2500-3500. Manual — part 2079

REAR SECTION

1. Position the rear section of the A/C liquid line (3)

into the engine compartment.

2. Remove the tape or plugs from the opened ends of

the A/C liquid lines and the evaporator inlet tube
(7).

3. Lubricate a new seal with clean refrigerant oil and

install it on the rear liquid line spring-lock coupler
fitting. Use only the specified seal as it is made of
a special material for the R-134a system. Use only
refrigerant oil of the type recommended for the A/C
compressor in the vehicle.

4. Connect the rear section of the A/C liquid to the

evaporator inlet tube (Refer to 24 - HEATING &
AIR

CONDITIONING/PLUMBING/COUPLER-RE-

FRIGERANT LINE - INSTALLATION).

5. Install the secondary retaining clip (6) onto the

spring-lock coupler that secures the rear section of
the A/C liquid to the evaporator inlet tube.

6. Engage the A/C liquid line into the body retaining clips.

7. Lubricate a new seal with clean refrigerant oil and install it on the front liquid line spring-lock coupler fitting. Use

only the specified seal as it is made of a special material for the R-134a system. Use only refrigerant oil of the
type recommended for the A/C compressor in the vehicle.

8. Connect the rear section of the A/C liquid to the front section of the liquid line (1) (Refer to 24 - HEATING & AIR

CONDITIONING/PLUMBING/COUPLER-REFRIGERANT LINE - INSTALLATION).

9. Install the secondary retaining clip (2) onto the spring-lock coupler that secures the front section of the A/C liquid

to the rear section of the liquid line.

10. Install the air filter housing (Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR FILTER HOUSING - INSTALLA-

TION).

11. Reconnect the negative battery cable.

12. Evacuate the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD

PROCEDURE - REFRIGERANT SYSTEM EVACUATE).

13. Charge the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PRO-

CEDURE - REFRIGERANT SYSTEM CHARGE).

LINE-A/C SUCTION

DESCRIPTION

The A/C suction line is the refrigerant line that goes from the A/C evaporator to the A/C compressor.

The A/C suction line for the 5.9L Diesel engine is serviced as an assembly with the discharge line.

The A/C discharge line for the 8.3L engine is secured to the top of fan shroud by two retainers.

CAUTION: Use only O-ring seals specified for the vehicle. Failure to use the correct O-ring seal will cause
the refrigerant system connections to leak.

The A/C suction line has no serviceable parts except for the rubber O-ring seals and the secondary retaining clip.
The O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refriger-
ant. The O-ring seals must be replaced whenever the A/C suction line is removed and installed.

If the A/C suction line is found to be leaking or is damaged, it must be replaced.

24 - 316

PLUMBING

DR/DH

REMOVAL

3.7L/4.7L ENGINES

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

1. Recover the refrigerant from the refrigerant system

(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING

-

STANDARD

PROCEDURE

-

REFRIGERANT SYSTEM RECOVERY).

2. Disconnect and isolate the negative battery cable.

3. Remove the air filter housing cover (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

FILTER

HOUSING - REMOVAL).

4. Remove the nut (4) that secures the A/C suction

line (5) to the A/C compressor (6).

5. Disconnect the A/C suction line from the A/C com-

pressor and remove and discard the seal.

6. Install plugs in, or tape over the opened refrigerant

line fitting and the compressor port.

7. Remove the secondary retaining clip (7) from the

spring-lock coupler (1) that secures the A/C suction
line (6) to the accumulator (5).

8. Using the proper A/C line disconnect tool, discon-

nect the A/C suction line from the A/C accumulator
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING/COUPLER-REFRIGERANT

LINE

-

REMOVAL).

9. Remove the O-ring seals from the accumulator

tube fitting and discard the seals.

10. Install plugs in, or tape over the opened suction

line fitting and the accumulator outlet tube.

11. Remove the A/C suction line from the engine

compartment.

DR/DH

PLUMBING

24 - 317

5.7L ENGINE

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

1. Recover the refrigerant from the refrigerant system

(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING

-

STANDARD

PROCEDURE

-

REFRIGERANT SYSTEM RECOVERY).

2. Disconnect and isolate the negative battery cable.

3. Remove the air filter housing cover (Refer to 9 -

ENGINE/AIR

INTAKE

SYSTEM/AIR

FILTER

HOUSING - REMOVAL).

4. Remove the nut (4) that secures the A/C suction

line (5) to the A/C compressor (6).

5. Disconnect the A/C suction line from the A/C com-

pressor and remove and discard the seal.

6. Install plugs in, or tape over the opened refrigerant

line fitting and the compressor port.

7. Remove the secondary retaining clip (7) from the

spring-lock coupler (1) that secures the A/C suction
line (6) to the accumulator (5).

8. Using the proper A/C line disconnect tool, discon-

nect the A/C suction line from the A/C accumulator
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING/COUPLER-REFRIGERANT

LINE

-

REMOVAL).

9. Remove the O-ring seals from the accumulator

tube fitting and discard the seals.

10. Install plugs in, or tape over the opened suction

line fitting and the accumulator outlet tube.

11. Remove the A/C suction line from the engine

compartment.

5.9L DIESEL ENGINE

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

24 - 318

PLUMBING

DR/DH

NOTE: The A/C suction line for the 5.9L Diesel engine is serviced as an assembly with the discharge line.

1. Recover the refrigerant from the refrigerant system

(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING

-

STANDARD

PROCEDURE

-

REFRIGERANT SYSTEM RECOVERY).

2. Disconnect and isolate the negative battery cable.

3. Remove the air filter housing cover (Refer to 9 -

ENGINE/AIR INTAKE SYSTEM).

4. Disconnect the wire harness connector (5) from the

A/C pressure transducer.

5. Remove the nut (2) that secures the A/C discharge

line (8) to the A/C condenser (1).

6. Disconnect the A/C discharge line from the A/C

condenser and remove and discard the seal.

7. Install plugs in, or tape over the discharge line fit-

ting and condenser inlet port.

8. Remove the bolt (7) that secures the A/C suction

and discharge line assembly to the A/C compressor
(6).

9. Disconnect the A/C discharge line from the A/C

compressor and remove and discard the seal.

10. Install plugs in, or tape over the opened A/C suction and discharge line fittings and the compressor ports.

11. If necessary, remove the A/C pressure transducer from the A/C discharge line (Refer to 24 - HEATING & AIR

CONDITIONING/CONTROLS/TRANSDUCER-A/C PRESSURE - REMOVAL).

12. Remove the secondary retaining clip (7) from the

spring-lock coupler (1) that secures the A/C suc-
tion line (6) to the accumulator (5).

13. Using the proper A/C line disconnect tool, discon-

nect the A/C suction line from the A/C accumula-
tor

(Refer

to

24

-

HEATING

&

AIR

CONDITIONING/PLUMBING/COUPLER-REFRIG-
ERANT LINE - REMOVAL).

14. Remove the O-ring seals from the accumulator

tube fitting and discard the seals.

15. Install plugs in, or tape over the opened suction

line fitting and the accumulator outlet tube.

16. Remove the A/C suction and discharge line

assembly from the engine compartment.

8.3L ENGINE

WARNING: Refer to the applicable warnings and cautions for this system before performing the following
operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result
in possible personal injury or death.

DR/DH

PLUMBING

24 - 319