Hombre S Regular Cab 4WD V6-4.3L (1999)
Receiver Dryer: Technical Service Bulletins
A/C - Receiver Dryer Replacement Recommendations
BULLETIN NUMBER:
IB00-12-S002
ISSUE DATE:
AUGUST 2000
GROUP:
AIR CONDITIONING
REPLACEMENT OF THE RECEIVER DRIER DURING AIR CONDITIONING AND SERVICE
AFFECTED VEHICLES
All Isuzu vehicles
SERVICE INFORMATION
In the past, it has been common repair procedure to replace the receiver drier whenever the system is opened. Further testing has confirmed that
replacement of the receiver drier is not necessary unless the receiver drier has been left open exposed to the atmosphere for several hours or found to be
defective. A defective receiver drier is one that is:
^
Leaking
^
Restricted
IMPORTANT:
If proper diagnosis concludes that the receiver drier is leaking or is restricted, then the receiver drier should be replaced.
In addition, there are two other conditions when a receiver drier should be replaced even though it is not the cause of the failure. The Receiver Drier
should be replaced when either or both of the following two conditions exists:
^
when the refrigerant oil contains metallic particles
^
When the Air Conditioning Compressor is seized.
Special Service Note:
In order to maximize the life of the A/C System and maintain maximum performance, the following precautions should be performed:
^
Anytime an Air Conditioning component is disconnected for servicing, the opening should be capped until the repair is to be completed.
^
If a new Receiver Drier is installed during a repair, it should be the last component installed.
^
The system should be properly evacuated and recharged. The evacuation should achieve a maximum vacuum for at least 30 minutes to boil out all the
moisture out of the system.
It is imperative to remember that the receiver drier has three distinct tasks, they are:
^
To provide a reservoir to enable a consistent flow of liquid refrigerant and refrigerant oil to the rest of the Air Conditioning system when correctly
charged.
^
To provide filtration and straining of unwanted particles within the system.
^
To remove unwanted moisture from the system using desiccant material contained in the Receiver Drier.
NOTE:
By performing the service tips as indicated, the Air Conditioning system should perform according to the manufacturer's specifications.
Disclaimer
