Slow Or Incomplete Pedal Return; Brakes Self-Apply, Stick,

BIND, GRAB OR ARE OVERSENSITIVE

1. Run pump at fast idle. Pull the brake pedal rearward with approximately 10 lbs. of force. Release the pedal and measure the distance to the floor board. If the pedal does not return properly, check the pedal to be sure it is operating freely. Correct any sticking, binding as necessaary.
2. If brakes self-apply and pedal is free, check for obstruction in the return line or kinked connections between Hydro-boost and pump reservoir.
3. Remove obstruction or replace line as required. If condition remains, check for a damaged reaction end. If damaged, Hydro-boost should be replaced or repaired.
4. If the pedal is free of any binding condition, and there are no obstructions in the return line, remove the master cylinder reservoir cover.
5. Observe the brake fluid in the reservoir while rapidly depressing the brake pedal one inch. Fluid surface should have some movement or sout in the forward reservoir section. Minor spouting may occur in the rear reservour section also. If no movement or sprouting or fluid occurs in forward reservoir section, the Hydro-boost unit is defective and must be replaced or repaired.