K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Make sure the vehicle compressor is engaged. Turn the cart on and start the recovery cycle. OPEN ONLY THE HIGH SIDE VALVE ON THE
GAUGE SET. The vehicle system should eventually shut the compressor off. If the low side pressure drops below 15 psi, and the compressor does
not turn off, turn it off now (go to "VENT" or "ECON" mode), but leave the engine running and the blower on "high".
c.
After the recovery cart shuts off the first time, wait 5 minutes. If the pressure on either the high or the low side rises above 0 psi, restart the
recovery process. After the second shutoff, wait 2 minutes. If the pressure again rises above 0 psi, restart, and after shutoff, again wait 2
minutes. The process can be stopped when the pressure does not rise above 0 psi after 2 minutes. The engine can be shut off at this time.
d.
Remove the R-12 reclaim hose and the gauge set from the vehicle.
Any repairs needed should be done at this time. If any components other than the compressor are replaced, they should be installed dry, and no
extra oil should be added.
3.
Install the Service Port Conversion Fittings
Important:
For GEO vehicles, skip to Step 4. Fitting installation is covered in that step. For vehicles that require a HPCOS, see Step 4. Some of these vehicles
use a specific combination fitting to mount the HPCOS, which includes the high side service port fitting and the HPCOS port. The low side fitting is
installed as detailed below. See "Platform Details" for further information.
Important:
A new tool kit, P/N J 39500-250, has been released. This kit contains the following items:
^
J 39500-71 Oil Injection Bottle Conversion Kit (includes 3 12 oz bottles, an extender tube, caps, and fittings)
^
J 39500-275 Tool kit, including the following: (See Figure 2)
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J 34611-A Double ended valve core remover
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J 25498-A High side adapter fitting
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J 38702 Deep valve core adapter fitting
