- Disconnect the negative battery cable.
- Disconnect the fluid return hose at the pump and drain the fluid into a container.
- Remove the pressure hose from the pump and, if necessary, drain the fluid into a container. Do not remove the fitting from the pump.
- Disconnect the belt from the pulley. On 5.0L engines, use pulley removal tool T69L-10300-B or equivalent, to remove the pulley.
- Remove the mounting bolts and remove the pump.
- On 5.0L engines, place the pump on the mounting bracket and install the bolts at the front of the pump. Tighten to 30-45 ft. lbs. (40-62 Nm).
- On 4.6L engines, place the pump on the mounting bosses of the engine block and install the bolts at the side of the pump. Tighten to 15-22 ft. lbs. (20-30 Nm).
- On 5.0L engines, install the pump pulley using pulley replacer tool T65P-3A733-C or equivalent.
- Place the belt on the pump pulley and adjust the tension, if necessary.
- Install the pressure hose to the pump fitting. Tighten the tube nut with a tube nut wrench rather than with an open-end wrench. Tighten to 20-25 ft. lbs. (27-34 Nm) on 1989-91 vehicles or 35-45 ft. lbs. (47-60 Nm) on 1992-98 vehicles.
Do not overtighten this fitting. Swivel and/or end play of the fitting is normal and does not indicate a loose fitting. Over-tightening the tube nut can collapse the tube nut wall, resulting in a leak and requiring replacement of the entire pressure hose assembly. Use of an open-end wrench to tighten the nut can deform the tube nut hex, which may result in improper torque and may make further servicing of the system difficult.
- Connect the return hose to the pump and tighten the clamp.
- Fill the reservoir with the proper type and quantity of fluid.
- Bleed the air from the system.