buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

Hydraulic Assembly, Traction Control > < Valve Block Operation, ABS|Page 4629
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Brake Proportioning/Combination Valve: Service and Repair

Fig. 1 Valve Block Mounting Nuts

1.

Remove the hydraulic unit.

2.

Remove the three valve block-to-booster/master cylinder nuts (with washers), using a 13 mm socket and driver.

3.

Remove the valve block from the booster/master cylinder. Note the location of the four o-ring seals.

4.

Lubricate and install the valve block o-ring seals on the booster/master cylinder.

5.

Install the replacement valve block. Tighten the mounting nuts (with washers) to 25 N-m (18 lb. ft.) torque.

6.

Install the hydraulic unit.

Hydraulic Assembly, Traction Control > < Valve Block Operation, ABS|Page 4629