Steering - Power Steering Pump Service Precautions

91mitsubishi05

NO. TSB 91-37-004

DATE March, 1991

MODEL 1991 Precis


SUBJECT: POWER STEERING SERVICING PRECAUTIONS




PURPOSE

Inside the Precis power steering pump housing is a pressure switch which can be damaged during servicing of the power steering system and related components. The pressure switch contains seals which are made of a hard plastic material. The plastic seals can be damaged if during various service procedures; 1) The switch is hit by a tool; 2) Another component hits the switch; 3) A pry-bar presses against the switch housing; or 4) The wire connector is not removed when the pump is removed from the vehicle. If the switch is damaged power steering fluid will leak from it.

Figure 1:

Figure 2:

SERVICE PRECAUTIONS

When working near the power steering pump, pay special attention to the location (as shown in Figures 1 and 2) of the pressure switch, especially when performing the following service procedures:

1. When installing the alternator and adjusting the alternator belt tension.

2. When removing or reinstalling the engine.

3. When removing or reinstalling the power steering pump or power steering belt.


If the switch becomes damaged due to improper servicing techniques, replace the switch.