Cutlass Supreme V6-204 3.4L DOHC VIN X SFI (1995)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
Hydraulic Modulator Assembly Unit Repair
Gear Tension Relief Sequence
Gear Tension Relief Sequence
When the displacement cylinder pistons are in their topmost position, each motor has prevailing torque due to the force necessary to ensure each piston is
held firmly at the top of its travel. This torque results in "gear tension," or force on each gear that makes motor pack separation difficult.
To avoid injury, or damage to the gears, the "Gear Tension Relief Sequence" briefly reverses each motor to eliminate the prevailing torque.
Always perform the "Gear Tension Relief Sequence" with the scan tool prior to removing the hydraulic modulator-master cylinder assembly from the
vehicle.
Gear Cover
Gear Cover
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.
