S10/T10 P/U 2WD V6-4.3L VIN W (1997)
Vacuum Brake Booster: Service and Repair
Gauging
Measure
Tool Required:
^
J 37839 or a Pushrod Height Gauge
Gauging The Piston Rod
1. Gauge the booster with 85 kPa (25 in. hg) vacuum or maximum engine vacuum.
2. Check the maximum and minimum rod length using J 37839 or a Pushrod Height Gauge.
3. If the piston rod is not within limits, obtain a service adjustable piston rod and adjust the rod to the correct length.
