F 250 4WD LD Pickup V8-5.4L SOHC VIN L (1997)
2. Connect the A/C vacuum hose to the A/C vacuum check valve.
3. Install the two nuts on the engine side.
4. Check for a missing or damaged A/C tube lock coupling spring. A damaged spring can he removed with a small hooked wire. Install a new spring
if the old one is damaged or missing.
5. Clean the fittings.
6. On the (A) female spring lock coupling, check the inside of each fitting for scratches, corrosion or debris from deteriorated (B) O-rings.
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Remove any surface residue from the inside of the coupling by polishing with 400-grit emery cloth or equivalent. Polish the surface by using a
twisting motion so that any scratches made will not cross the O-ring sealing surface. Finish polishing with 600-grit emery cloth or equivalent.
Remove all polishing residue from the fitting with a lint free cloth.
