Tools Required
• | J 41447 R-134A
A/C Tracer Dye - Box of 24 |
• | J 42220 Universal
12V Leak Detection Lamp |
• | J 43600 ACR 2000
Air Conditioning Service Center |
Important: Flushing with the J 43600
is not intended to remove metal from the air conditioning
(A/C) system.
Flushing is intended to remove the following:
• | Contaminated polyalkylene glycol (PAG) oil |
• | Desiccant, following a desiccant bag failure |
• | Refrigerant contamination |
Important: Warmer engine or ambient temperature decreases
the refrigerant recovery time during the A/C flush procedure.
- Recover the refrigerant. Refer to
Refrigerant Recovery and Recharging
.
- Remove the orifice tube. Refer to
Expansion (Orifice) Tube Replacement
.
- Connect the A/C lines with the orifice tube removed.
- Remove the A/C compressor. Refer to
Air Conditioning Compressor Replacement
.
- Install J 45268-3 to the A/C compressor hose assembly.
- Forward flow refrigerant flushing is recommended
for contaminated refrigerant or PAG oil.
Perform the following procedure:
| Important: The filter inside J 45268-1 is serviceable.
Remove and discard the check valve from the filter.
|
6.1. | Service the filter with ACDelco P/N GF 470, before each flush. |
Connect J 45268-1 flush filter to the suction port of J 45268-3
flush adapter.
6.2. | Connect the blue hose from J 43600
to J 45268-1 flush filter adapter. |
6.3. | Connect the red hose from J 43600
to J 45268-3. |
- Reverse flow refrigerant flushing is recommended for desiccant bag failure
only. Perform the following procedure and replace the accumulator when the flush is
complete:
| Important: The filter inside J 45268-1 is serviceable.
Remove and discard the check valve from the filter.
|
7.1. | Service the filter with ACDelco P/N GF 470, before each flush. |
7.2. | Connect the J 45268-1 flush filter to the discharge port of J 45268-3
flush adapter. |
7.3. | Connect the blue hose from J 43600
to J 45268-1 flush filter adapter. |
7.4. | Connect the red hose from J 43600
to the suction port of J 45268-3. |
Important: Close the valve on the external refrigerant
tank, before starting the flush process.
- Flush the A/C system. Follow the instructions supplied with the J 43600
.
- Remove J 45268-3 from the A/C compressor hose assembly.
Notice: Refer to Fastener Notice in the Preface section.
Important: Flushing will remove all the PAG oil from
the A/C system.
The A/C system must be replenished with the correct amount
of PAG oil.
- If you will reinstall the removed A/C compressor, perform the following procedure:
10.1. | Remove the A/C compressor drain plug. |
10.2. | Drain the PAG oil from the A/C compressor. Rotate the compressor input
shaft to assist in draining the PAG oil from the compressor. |
10.3. | Install the A/C compressor drain plug. |
Tighten
Tighten the drain plug to 20 N·m (15 lb ft).
- If you will replace the A/C compressor after flushing the system, perform
the following procedure:
11.2. | If the service compressor is shipped with PAG oil, DO NOT drain the new
PAG oil from the compressor. |
11.3. | Deduct the amount of PAG oil shipped with the service compressor from
the amount of PAG oil listed in the capacities table. Refer to
Refrigerant System Capacities
. |
11.4. | Add the calculated amount to the compressor, as needed. |
11.5. | If the service compressor is shipped dry, no calculation is required.
Add the total system capacity of PAG oil to the compressor. Refer to
Refrigerant System Capacities
. |
Important: Flushing will remove the fluorescent leak
detection dye from the A/C system.
- Add one bottle of J 41447
directly to the A/C compressor.
- Install the A/C compressor. Refer to
Air Conditioning Compressor Replacement
.
- Inspect the orifice tube for debris. Clean or replace as needed.
- Install the orifice tube. Refer to
Expansion (Orifice) Tube Replacement
.
- Evacuate and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging
.
- Leak test the fittings using J 42220
.