AIR CONDITIONING JOINT DUAL O-RING SYSTEM

MODELS AFFECTED: 1989 ELECTRA/PARK AVENUES AND LESABRES

DUAL O-RING A/C JOINT --------------------- The 1989 Electra/Park Avenue and LeSabres introduces a new 0-ring joint design for the A/C system which will increase durability of the joint seal by providing a second 0-ring seal.

The dual 0-ring fittinq desiqn consists of: (Refer to Figure 1)

Aluminum alloy externally threaded fitting which is brazed or welded to an aluminum tube.

Free spinning, plated steel, internally threaded nut.

Precisioned machine male piloted aluminum tube end which accomodates two 0-rings.

Servicing The dual 0-ring joint

When attempting to service the dual 0-ring joint, the following procedures should be followed:

*Disassemble:

Make sure A/C system is completely discharged.

Use Kent-Moore Tool J 38042 (Dual 0-ring disassembly tool), to separate the joint while loosening female nut. Refer to Figures 2, 3 & 4.

Remove and discard 0-rings.

- Use nonmetallic tool when removing 0-rings to prevent chance of damaging seal surface.

Replace 0-rings

Avoid excessive stretch and twisting of the replacement 0-rings.

IMPORTANT: Dual 0-ring fittings use a different size 0-ring from standard A/C joint fittings (see Figure 5 below).

*Reassemble 0-ring joint

- Carefully align forms (tubes) for pilot to bore insertion and push together completely (Refer to Figure 6).

- Slightly oiling the bore and 0-rings will aid insertion.

Tighten steel nut. A torque of 15-20 ft. lbs. is required on all dual 0-ring joints.

*NOTICE: The use of proper wrenches when loosening or making corrections is important. A backup wrench should be used on the brazed or welded fitting to prevent distortion of A/C lines.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.