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Home >> Oldsmobile >> 1995 >> Cutlass Ciera Cruiser L4-2.2L VIN 4 >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Hydraulic Control Assembly - Antilock Brakes >> Service and Repair >> Hydraulic Modulator Assembly Unit Repair >> ABS Motor Pack

ABS Motor Pack


MOTOR PACK







CAUTION: To help avoid personal injury, due to a retained load on the ABS hydraulic modulator, the gear tension relief function of the Tech 1 must be performed prior to removal of the ABS hydraulic modulator-master cylinder assembly.

NOTICE: The following service procedures shall be performed only after the ABS hydraulic modulator-master cylinder assembly has been removed from the vehicle. Do not perform these procedures with the unit installed on the vehicle. Complete overhaul of the ABS hydraulic modulator-master cylinder assembly is not authorized. These steps will break the unit down into major components for replacement purposes.


ABS Brake Modulator/Master Cylinder Assembly Components:






Disassemble

1. Remove gear cover.
2. Four Torx head screws attaching ABS brake motor pack.

Important

^ Use care when handling the motor pack to ensure the motor pack connectors are not damaged, or accidental intrusion of brake fluid into the motor pack does not occur. This may result in a premature failure of the motor pack.
^ Take care in handling the motor packs. If dropped or damaged during handling, the motor packs must be replaced.

3. Remove ABS motor pack.

Important

^ If disassembly of the brake modulator-master cylinder assembly was due to an ABS hydraulic functional test that did not pass, the Automated ABS brake motor pack Diagnosis Test described in this section should be performed at this time to isolate the ABS brake motor pack or brake modulator.
^ No repair of the motor pack is authorized. Replace as an assembly.

ABS Brake Modulator/Master Cylinder Assembly Components:






Assemble

1. With the brake modulator upside down, and the gears facing you, rotate each ABS brake modulator gear counterclockwise until movement stops. This procedure will position the pistons on the ABS brake modulator very close to the top of the modulator bore. This will simplify the brake bleeding procedure.
2. Motor pack to brake modulator assembly.

Important

^ Take care in handling the motor packs. If dropped or damaged during handling the ABS brake motor pack must be replaced.
^ Align each of the three ABS brake motor pack pinions with the brake modulator gears.

3. Four Torx head screws.

Tighten

^ Torx head screws to 4.5 Nm (40 inch lbs.).
4. Gear cover to ABS brake modulator-brake master cylinder assembly.

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