SERVICE MANUAL UPDATE-SEC. 3E NEW DESIGN P/S ADAPTER

SUBJECT: SERVICE MANUAL REVISION SECTION 3E STEERING (PROCEDURE TO REMOVE ADAPTER/RETURN LINE)

VEHICLES AFFECTED: 1991 E, K, C, V, MODELS

For 1991 model Eldorados, Sevilles, DeVilles, Fleetwoods, and Allantes there is a new design power steering adapter. This new design necessitates a special tool (J-36391) to remove the return line from the adapter. Refer to Figure 1. The following procedure outlines the required steps to remove the adapter and/or return line.

PUMP/RESERVOIR ADAPTER

A one-piece adapter is used to transfer power steering fluid from the retum pipe to the fluid reservoir and from the reservoir to the pump inlet. The adapter, shown in Figure 1 is a molded plastic assembly with attachment points (ports) for the reservoir inlet tube (3/8" diameter), reservoir outlet tube (5/8" diameter), retum pipe and pump inlet.

The following procedure should be used for removal and installation of the adapter. When inserting pipes into the adapter ports, take care to ensure that the internal O-rings are in place and are not cut or damaged.

[(- -)] Remove or Disconnect

1 . Serpentine belt.

2. Power steering fluid from reservoir.

3. Return line from adapter using special tool J-3639 1.

4. Pump mounting bolts. It is not necessary to remove pulley or pressure pipe fitting.

5. Reposition pump to disengage adapter from pump inlet.

6. Disengage return pipe from adapter.

7. Remove adapter from reservoir tubes.

[(o] Inspect

o All O-rings for proper positioning or damage. Replace any cut or damaged O-rings.

[(- -)] Install or Connect

1. Be sure that all O-rings are properly positioned on adapter, including pump port O-ring and seat protector.

2. Lubricate all adapter ports with petroleum jelly.

3. Install adapter on return pipe.

4. Position pump so that the adapter pump inlet tube is positioned in pump inlet. Be extremely careful to prevent seal damage.

5. Install adapter on reservoir tubes.

6. Install pump mounting bolts and tighten to 24 N-m (18 lbs. ft.).

7. Install serpentine belt.

8. Fill and bleed power steering system.

RETURN PIPE - COOLER TO PUMP

[(- -)] Remove or Disconnect

1. Fluid from reservoir.

2. Serpentine belt.

3. Retainer clip from block.

4. Return pipe from cooler pipe.

5. Pump mounting bolts and position pump out of way.

6. Return pipe from adapter using tool J 36391.

7. Return pipe from vehicle.

[(- -)] Install or Connect

1. Pipe and assemble in vehicle.

2. Return pipe to adapter.

3. Retainer clip to block.

4. Return pipe to cooler pipe.

5. Pump mounting bolts and tighten to 24 N.m (18 lbs. ft).

6. Serpentine belt.

7. Fill and bleed power steering system.

[(o] Inspect

o Inspect for leaks.

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.