A/C - System Receiver Drier Replacement Guidelines

Classification:
HA98-006

Reference:
NTB98-106

Date:
January 1, 1999

NEW A/C SYSTEM RECEIVER DRIER REPLACEMENT GUIDELINES

APPLIED VEHICLE(S):
All Models with R-134a refrigerant

SERVICE INFORMATION

The receiver drier (liquid tank) in the A/C system filters, dries and temporarily stores refrigerant received from the condenser. The receiver drier "tank" is equipped with a strainer that will retain most foreign material and prohibit it from circulating through the system.

The receiver drier currently used in the Nissan R-134a A/C systems has an operating life of approximately ten years. It is not necessary to replace the drier in an R-134a system during routine service.

In the older R-12 air conditioning systems, a small amount of moisture would enter the refrigerant system over time, requiring frequent receiver drier replacement. Improvements in the newer R-134a systems drastically reduce the amount of moisture that is able to enter the system, therefore extending the life of the receiver drier. The current R-134a systems incorporate improved drying agents, compressor lip seals, non-permeable hoses and captured O-rings on most system connections.

The following service procedure provides recommendations and guidelines that support the extended life of the R-134a A/C systems.

SERVICE PROCEDURE





Whenever the receiver drier or any A/C hose is disconnected for servicing always cover the exposed ports to prevent debris and moisture from entering the unit (see Figure 1 for inlet and outlet port location).

The A/C receiver drier in an R-134a system should be replaced only if:

1. The compressor is seized;

2. System oil contains metallic flakes;

3. Diagnosis indicates a major blockage.