SERVICE MANUAL UPDATE REVISED HUB/BEARING REMOVAL & INSTALL

REVISED HUB/BEARING REMOVAL AND INSTALLATION - SERVICE MANUAL UPDATE

VEHICLES AFFECTED: 1988 W CARLINES ----------------- SERVICE MANUAL UPDATE ---------------------

The revised front hub/bearing procedures will replace the, procedures in section 3C of the 1988 Buick W-car final manual and the 1988 Oldsmobile and Pontiac W-car preliminary manuals.

The 1988 Oldsmobile and Pontiac W-car final manuals and all subsequent manuals will include these revisions.

HUB/BEARING ASSEMBLY --------------------

Figure 1 Tool Required: J 28733-A Front Hub Spindle Remover

REMOVE OR DISCONNECT

1. Wheel cover 2. Loosen axle shaft nut (107) one turn.

IMPORTANT

o Do not remove nut at this time. Failure to follow proper see of removal may cause permanent bearing damage.

3. Loosen wheel nuts. 4. Raise vehicle (see Section 0A). 5. Wheel and tire assembly 6. Brake caliper/bracket assembly (104) (See Section 5) 7. Rotor (103) 8. Axle nut (107)and washer (106) 9. Loosen hub/bearing-to-knuckle attaching bolts (101). 10. Using J 28733-A, push axle splines (105) back out of the hub/bearing. 11. Hub/bearing-to-knuckle attaching bolts (101)

IMPORTANT

o Protect the axle seals and clamps from damage during handling.

12. Hub/bearing assembly (102)

INSPECT

o All components for wear or damage

INSTALL OR CONNECT

1. Hub/bearing assembly (102) onto axle shaft splines (105). Install hub/bearing-to-knuckle attaching bolts (101) (see Section 4D).

TIGHTEN

o Hub/bearing-to-knckle attaching bolts to 80 N-m (59 lbs. ft.)

2. Rotor (103) 3. Brake caliper/bracket assembly (104) 4. Wheel/tire assembly 5. Lower vehicle. 6. New drive axle nut (107) and washer (106)

TIGHTEN

o Wheel nuts to 140 N-m (100 lbs. ft.) o Drive axle nut to 250 N-m (184 lbs. ft.)

7. Wheel cover

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.