Vacuum Brake Booster: Service and Repair

Part 1 Of 2:

Part 2 Of 2:

MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
REMOVAL AND INSTALLATION

INSTALLATION SERVICE POINTS
>>A<< BRAKE BOOSTER VACUUM HOSE CONNECTION
Insert the brake booster vacuum hose to the brake booster assembly with its paint mark facing upward, and then secure the hose by using the hose clip.

>>B<< PUSH ROD PROTRUSION AMOUNT CHECK AND ADJUSTMENT





1. Measure dimension (A).
Standard value (A): 8.98 - 9.23 mm (0.354 - 0.363 inch)

NOTE: When a negative pressure of 66.7 kPa (19.7 inch Hg) is applied to the brake booster, the push rod should protrude 10.27 - 10.53 mm (0.404 - 0.414 inch).





2. If the protrusion amount is not within the standard value range, adjust the push rod length by turning the push rod. Use special tool MB991568 to turn the push rod while holding the rod spline with angle-nose pliers.