K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
C.
Parts Information
D.
Warranty Information
1.
Vehicle Still in Warranty
2.
Customer Paid' Retrofitting Costs
3.
Labor Time Information
Notes on Retrofit
Important:
Before proceeding with any retrofit, make sure you have all component Parts required on hand to perform a proper and complete repair with Minimal
downtime.
R-12 Removal Prior to Retrofit
To prepare a system for retrofitting, the R-12 must be recovered and the system must be completely evacuated. Evacuation is necessary to insure that
small amounts of R-12 and air remaining in the system are removed. This will prevent cross contamination of the two refrigerants, which could lead to
reduced A/C system reliability and performance.
It is very important that the specified times for waiting after recovery and evacuation not be reduced. This time is required to sufficiently remove
residual R-12 from the oil in the system.
A considerable amount of testing has determined that the following procedure is required to achieve satisfactory results and conform to SAE J 1661:
1.
Inspect Condition of Vehicle
Install the gauge set on the high and low side ports.
Use normal diagnostic procedures to find the cause of the vehicle's reported condition. One of three conditions will exist with the refrigerant
system:
a.
System pressure correct, no leaks - proceed to Step 2 (Recovery). This would normally apply when:
1.
The system must be recovered/recharged for a repair to a system other than the A/C system, or
2.
Where the A/C system condition did not involve leaks, but requires recovery/recharge to replace a component.
b.
Compressor not operating, but some charge. Leak test to find the leak, complete Step 2 (Recovery), then correct the leak before proceeding
with Step 3 (Conversion port installation).
c.
No charge in system - proceed with the Conversion port installation in Step 3. Use the ACR4 to evacuate for 5 minutes. If the leak can be
heard, repair the leak. If the leak cannot be heard, charge with 1/2 pound of R-134a. Leak test with the J 39400 Leak Detector, recover the
R-134a, repair any additional leaks found, and proceed with the evacuation in Step 5.
2.
Recover the R-12 from the System
Notice:
THIS PROCEDURE IS DIFFERENT THAN THE NORMAL (NON-RETROFIT) RECOVERY PROCEDURE. R-12 will be recovered through the
HIGH SIDE SERVICE PORT ONLY, WITH THE ENGINE RUNNING. Recovery through the low side will not effectively remove the R-12 from
the accumulator, resulting in possible damage to the retrofitted system.
Important:
Vehicle must be above 50° F (10° C) to allow for complete recovery of the R-12. If it is not, either allow it to warm up in the shop overnight, or
increase the evacuation time in Step 5.a to 30 minutes.
a.
Connect the recovery hose from the R-12 recovery cart (ACR3) to the middle port of the A/C gauge set. Open the oil drain valve on the
ACR3 cart long enough to drain the oil. Failure to do so could cause excessive amounts of oil to build up in the separator, resulting in
damage to the recovery cart compressor.
b.
Start the engine. Leave the hood up, and the windows open. On vehicles with manual A/C controls, set the A/C controls to normal A/C
mode, high blower, and temperature control to full cold. On cars with automatic A/C controls, set the temperature to 75° F, "AUTO" mode,
and manually select high blower.
