Power Brake Booster Push Rod Gauging Vacuum Brake Booster

J 37839 Power Brake Pushrod Height Gauge

1. Gauge the vacuum booster with 85.0 kPa (25 in Hg) vacuum or maximum engine vacuum.



2. Check the maximum and minimum piston rod length using J 37839 .
3. If the piston rod is not within limits, obtain a service adjustable piston rod, and adjust the rod to the correct length.

Power Brake Booster Push Rod Gauging Hydraulic Brake Booster

Tools Required

J 37839 Push Rod Height Gauge

Gauge the piston rod. Use the J 37839. Check the maximum and minimum rod length.

If the piston rod is not within limits, replace the rod with a service adjustable piston rod. Adjust the replacement rod to the correct measurement.