Isuzu — Charging the Refrigerant System
Maintenance · A/C system
From a Isuzu service manual — check it applies to your exact model before use.
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Before you start
- BE ABSOLUTELY SURE NOT TO OPEN THE HIGH-PRESSURE HAND VALVE - high-pressure refrigerant gas would flow backward and may cause the refrigerant container to burst.
Procedure
- Make sure evacuation is correctly completed.
- Connect center hose of manifold gauge to refrigerant container; purge charging line.
- Open low-pressure hand valve and charge about 200 g (0.44 lbs).
- Close low-pressure hand valve; check pressure.
- Check for refrigerant leaks with HFC-134a leak detector; repair if leak found.
- Open low-pressure hand valve and continue charging to specified amount.
- Charge system to specified amount then close low-pressure hand valve.
- Close low-pressure hand valve and charge valve; stop A/C and engine.
- Disconnect high and low pressure hoses.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 750 (1.65) g (lbs) - except DELPHI HD6/HT6: 600 (1.32) g (lbs)
Source: Isuzu service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.