Dodge Nitro. Manual - part 758

 

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Dodge Nitro. Manual - part 758

 

 

SYSTEM EMPTY 

1. Evacuate the refrigerant system to the lowest degree of vacuum possible (approximately -88 kPa (- 26 in. 

Hg) or greater vacuum). See REFRIGERANT SYSTEM EVACUATE. Determine if the system holds a 
vacuum for 15 minutes. If the refrigerant system will not maintain vacuum level, proceed to step 2. If 
vacuum is held, a leak is probably not present.  

2. Prepare and dispense 0.284 kilograms (10 ounces) of R-134a refrigerant into the evacuated refrigerant 

system. See REFRIGERANT SYSTEM CHARGE, and proceed to SYSTEM LOW .  

SYSTEM LOW 

1. Position the vehicle in a wind-free work area. This will aid in detecting small leaks.  

2. Operate the heating-A/C system with the engine at idle under the following conditions for at least 5 

minutes. 

Doors or windows open  

Transmission in Park or Neutral with the parking brake set (depending on transmission application) 

A/C compressor engaged with A/C-heater controls set to Recirculation mode (max-A/C), full cool, 
panel mode and high speed blower.  

3. Shut the vehicle Off and wait 2-7 minutes. Then use an electronic leak detector that is designed to detect 

R-134a refrigerant and search for leaks. Fittings, lines or components that appear to be oily usually 
indicate a refrigerant leak. To inspect the A/C evaporator for leaks, insert the leak detector probe into the 
passenger side floor duct. A dye for R-134a is available to aid in leak detection. Use only Chrysler 
approved refrigerant dye.  

STANDARD PROCEDURE 

REFRIGERANT SYSTEM EVACUATE 

If an A/C compressor designed to use R-134a refrigerant is left open to the atmosphere for an extended period 
of time. It is recommended that the refrigerant oil be drained and replaced with new oil or a new A/C 
compressor be used. This will eliminate the possibility of contaminating the refrigerant system. 

If the refrigerant system has been open to the atmosphere, it must be evacuated before the system can be filled. 
Moisture and air mixed with the refrigerant will raise the compressor head pressure above acceptable operating 
levels. This will reduce the performance of the A/C system and damage the A/C compressor. Moisture will boil 
at near room temperature when exposed to vacuum. To evacuate the refrigerant system: 

CAUTION: A leak detector only designed for R-12 refrigerant will not detect 

leaks in an R-134a refrigerant system.

NOTE:

Special effort must be used to prevent moisture from entering the A/C system 
oil. Moisture in the oil is very difficult to remove and will cause a reliability 
problem with the A/C compressor.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

  

1. Recover the refrigerant system. See REFRIGERANT SYSTEM RECOVERY.  

2. Connect a suitable charging station, refrigerant recovery machine or a manifold gauge set with vacuum 

pump and refrigerant recovery equipment. See REFRIGERANT SYSTEM SERVICE EQUIPMENT.  

3. Open the suction and discharge valves and start the vacuum pump. The vacuum pump should run a 

minimum of 45 minutes prior to charge to eliminate all moisture in system. When the suction gauge reads 
to the lowest degree of vacuum possible (approximately -88 kPa (- 26 in. Hg) or greater) for 30 minutes, 
close all valves and turn off vacuum pump. If the system fails to reach specified vacuum, the refrigerant 
system likely has a leak that must be corrected. If the refrigerant system maintains specified vacuum for 
at least 30 minutes, start the vacuum pump, open the suction and discharge valves. Then allow the system 
to evacuate an additional 10 minutes.  

4. Close all valves. Turn off and disconnect the vacuum pump.  

5. Charge the refrigerant system. See REFRIGERANT SYSTEM CHARGE.  

REFRIGERANT SYSTEM SERVICE EQUIPMENT 

NOTE:

When connecting the service equipment coupling to the line fitting, verify that 
the valve of the coupling is fully closed. This will reduce the amount of effort 
required to make the connection.

WARNING:

Refer to the applicable warnings and cautions for this system before 
performing the following operation. See WARNING, and CAUTION. Failure 
to follow the warnings and cautions could result in possible personal 
injury or death.

WARNING:

Eye protection must be worn when servicing an air conditioning 
refrigerant system. Turn off (rotate clockwise) all valves on the equipment 
being used, before connecting to or disconnecting from the refrigerant 
system. Failure to observe these warnings may result in personal injury 
or death.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

  

Fig. 118: R-134a Refrigerant Recovery/Recycling/Charging Station 
Courtesy of CHRYSLER LLC 

When servicing the A/C system, a R-134a refrigerant recovery/recycling/charging station that meets SAE 
standard J2210 must be used (1). Contact an automotive service equipment supplier for refrigerant 
recovery/recycling/charging equipment. Refer to the operating instructions supplied by the equipment 
manufacturer for proper care and use of this equipment.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

  

Fig. 119: Manifold Gauge Set 
Courtesy of CHRYSLER LLC 

A manifold gauge set (1) may be needed with some recovery/recycling/charging equipment. The manifold 
gauge set should have manual shut-off valves (2 and 6), or automatic back-flow valves located at the service 
port connector end of the manifold gauge set hoses (4 and 5). This will prevent refrigerant from being released 
into the atmosphere. 

MANIFOLD GAUGE SET CONNECTIONS 

CAUTION: Do not use an R-12 manifold gauge set on an R-134a system. The 

refrigerants are not compatible and system damage will result.

 

2007 Dodge Nitro R/T 

2007 HVAC Heating & Air Conditioning - Service Information - Nitro

  

 

 

 

 

 

 

 

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