A/C - Suction Line Screen Kit Recommendations
TSB IB04-12-S003J 44551 A/C Suction Screen Kit Repair Recommendations And Procedures After Compressor Failures
Issue Date: March, 2004
Affected Vehicles
1996-2000 Isuzu Hombre (TH) and 2003-2004 Isuzu Ascender (US).
Service Information
After a compressor failure, it is extremely important to eliminate and/or contain the debris that causes repeat repairs. The debris generated from a compressor failure is discharged into the compressor suction line, the discharge line, the condenser and the liquid line. The use of the J 44551 Suction Screen Kit DOES NOT replace the need for liquid line filters as described in the vehicle Service Manual. Liquid line filters should be used whenever possible (after a catastrophic compressor failure) to protect the expansion device (orifice tube or TXV) from debris.
Analysis of failed replacement compressors show the debris discharged into the INLET side of the compressor (suction line) is often pulled into the replacement compressor. It is important to keep this debris out of the new compressor to avoid repeat compressor failure. The J 44551 Suction Screen Kit is designed to help protect the NEW (replacement) compressor from ingesting debris that was sent into the SUCTION side of the system during a compressor failure.
The J 44551 kit supplies your dealership with the right tools and supplies to cover the Delphi HD6, HU6 and HT6 compressors for most Isuzu applications. Delphi V5 and V7 compressors already have this screen installed in the suction port of the compressor and do not need an additional screen installed. Refer to the Service Manual for identification of Delphi compressors.
Service Procedure
Tools Required
J 44551 Suction Screen Kit
The J 44551 Suction Screen Kit contains three different screen sizes. It is important to select the correct size screen that will press fit into the suction port of the compressor hose assembly. The screen should not be installed loose inside the hose assembly.
Installation Procedure
1. Evacuate the air conditioning system completely using the applicable recovery equipment.
2. Remove the bolt that attaches the manifold of the muffler assembly hose to the air conditioning compressor.
3. Use the Suction Port Sizing Tool in order to determine the appropriate size filter screen (see figure 1).
4. Install the proper Installation Mandrel on the threaded portion of the Installation Tool (see figure 2).
5. Using the Installation Tool, place the manifold into the fixture of the tool.
A. Lubricate the applicable filter screen with refrigerant lubricant.
B. Ensure that you are on the suction side of the air conditioning manifold.
C. Place the filter screen straight into the bore before proceeding.
D. Using a 9/16 in wrench, turn the bolt of the Installation Tool clockwise, pressing the filter screen into the bore. The filter screen must be flush with or slightly below the bore (see figure 3).
6. Reinstall the manifold on the rear of the air conditioning compressor. Make sure to tighten to the correct specifications (see figure 3).
NOTE:
Be sure to clean the appropriate surface before applying the Notification Label.
7. Included in the kit is a bright yellow Notification Label with the following message: ATTENTION! Suction Line Screen Installed. It is very important that you apply this label to the manifold, the suction line, or some other appropriate, highly visible location.
A. Using the appropriate Removal Tool, place the Removal Tool into the bore of the filter screen (see figure 4).
B. Turn the Removal Tool one turn clockwise, or until tight.
C. Turn the nut clockwise to remove the filter screen using the appropriate size wrench.
^ 11/16 in wrench for size A filter screen
^ 3/4 in wrench for size B filter screen
^ 7/8 in wrench for size C filter screen
Disclaimer