BENCH BLEEDING MASTER CYLINDER

Bench bleeding the master cylinder before installing it on the truck reduces the possibility of getting air into the lines.

1. Connect two short pieces of brake line to the outlet fittings, bend them until the free end is below the fluid level in the master cylinder reservoirs.
2. Fill the reservoirs with fresh brake fluid. Pump the piston until no more air bubbles appear in the reservoir(s).
3. Disconnect the two short lines, refill the master cylinder and securely install the cylinder cap(s).
4. Install the master cylinder on the truck. Attach the lines but do not completely tighten them. Force any air that might have been trapped in the connection by slowly depressing the brake pedal. Tighten the lines before releasing the brake pedal.