Brake Booster - Pushrod Clearance Adjustment

13-25prose procedure

Pushrod Clearance Adjustment

NOTE

Master cylinder pushrod-to-piston clearance must be checked and adjustments made, if necessary, before installing master cylinder.

1
Using the Push Rod Adjustment Gauge, adjust bolt so the top of it is flush with end of master cylinder piston.
2
Install the master cylinder rod seal between the push rod adjustment gauge and brake booster.
3
Without disturbing the adjusting bolt's position, put the gauge upside down on the booster.
4
Install the master cylinder nuts and tighten to the specified torque.
5
Connect the booster in-line with a vacuum gauge to the booster's apply a 500 mm Hg (20 in Hg) vacuum and hold.
6
With a feeler gauge, measure the clearance between the gauge body and the adjusting nut.
CLEARANCE: 0-0.4 mm (0-0.016 in)
7
If clearance is incorrect, loosen the star locknut and turn the adjuster in or out to adjust. Hold the clevis while adjusting.
If the clearance between the gauge body and adjusting nut is 0 mm, the push rod-to-piston clearance is 0.04 mm. If the clearance between the gauge body and adjusting nut is 0.4 mm, the push rod-to-piston clearance is 0 mm.
8
Tighten the star locknut securely.

Specification	Value
Pushrod clearance	0-0.4 mm (0-0.016 in)
Vacuum gauge fitting	15N·m

Pushrod clearance

0-0.4 mm (0-0.016 in)

Vacuum gauge fitting

15N·m