Removal/Installation

Removal:






A. Remove the nuts and bolts securing the low-pressure hose shown in the illustration above and, using a wire, suspend the hose from the hood to a position where it does not hamper the removal and installation of the brake booster.

Caution: Move the hose slowly with care not to bend it.

Installation:






A. In the case of AWD, install the vacuum hose to the rake booster nipple as shown in the image above. Secure the hose with the hose clip. Install the other end of the vacuum hose fully onto its port on the engine. Secure the hose using the hose clip.

Caution: The check valve and the pipe part of the brake booster must not contact each other.






A. Adjust the clearance (A) between the brake booster pushrod and primary piston as follows:






- Measure the dimension (B) between the master cylinder end face and piston. Note that to obtain (B), first take measurement with a square placed on the master cylinder end face. Then, subtract the thickness of the square to arrive at (B).






- Obtain the dimension (C) between the brake booster mounting surface on the master cylinder and the end face.





- Measure the dimension (D) between the master cylinder mounting surface on brake booster and the push rod end. Note that to obtain (D), first take measurement with a square placed on the brake booster then subtract the thickness of the square to arrive at (D).






- Using the measured values obtained in the above steps, obtain the clearance (A) between the brake booster push rod and primary piston as follows:
Standard value: A(A = B - C - D)
7 + 8 inch brake booster
0.55 - 0.75 mm (.022 - .030 in.)
8 + 9 inch brake booster
0.65 - 0.85 mm (.026 - .033 in.)

If the clearance is not within the standard value range, turn the push rod screw to achieve desired length.

Caution: Improper clearance may cause excessive brake drag.