Hydro-Boost

HYDRO-BOOST

1. Disconnect stoplight switch wires at connector and remove hairpin retainer, then slide stoplight switch off brake pedal pin far enough for switch outer hole to clear pin and remove pin from switch.
2. Slide hydro-boost pushrod and nylon washers and bushing off brake pedal pin.
3. Remove master cylinder and position to one side without disturbing hydraulic lines. It is not necessary to disconnect brake lines, but care should be taken not to deform lines.
4. Disconnect pressure, steering gear and return lines from booster, then plug lines and ports in hydro-boost to prevent entry of dirt.
5. Remove hydro-boost retaining nuts, and remove assembly sliding pushrod link from engine side of dash panel.
6. Reverse procedure to install. To purge system, disconnect coil wire so that engine will not start. Fill power steering pump reservoir, then while engaging starter, pump brake pedal. Do not cycle steering wheel until all residual air has been purged from the hydro boost unit. Check fluid level, then connect coil wire and start engine. Apply brakes with a pumping action and cycle steering wheel, then check system for leaks.