CONVENTIONAL BRAKE SYSTEM

P-15prose procedure

Push rod clearance inspection (continued)

4
Remove the SST from the power brake unit without disturbing the adjusting nut. Set the SST onto the master cylinder as shown in the figure.
When pushing only use enough pressure to bottom the rod in the piston. If too much pressure is applied a false reading will occur.
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5
Push lightly on the end of the SST gauge rod to be sure it is bottomed in the master cylinder piston, and note any clearance between the SST body and the adjusting nut (clearance B) or between the body and the master cylinder (clearance C). Adjust the push rod as necessary as outlined in "Adjustment" below.

Push rod clearance measurement result

Measurement	Push rod
Clearance at (B)	Too short
Clearance at (C)	Too long
No clearance at (B) or (C)	OK

Clearance at (B)

Push rodToo short

Clearance at (C)

Push rodToo long

No clearance at (B) or (C)

Push rodOK

Adjustment

NOTE

The threads of the push rod are specially designed so that the bolt becomes harder to turn past a certain point to prevent loosening of the bolt. Turn the bolt only within this range when adjusting.

Clearance at B

1
Push lightly on the end of the SST gauge rod, and measure the clearance between the adjusting nut and the SST body.
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2
Using the SSTs, turn the nut to lengthen the power brake unit push rod an amount equal to the clearance measured at B.

Clearance at C

1
Measure and record height D1 of the gauge rod.
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