P/S - Updated Pressure Test Procedure

9222buick04

Bulletin: 89-3-21

Date: July, '89

Ref. No.: 89-195-3

Corp. Ref. No.: 933205


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 3B, POWER STEERING SYSTEM PROCEDURE

MODELS AFFECTED:
1988-89 REGALS


SERVICE MANUAL UPDATE

This power steering pressure test procedure replaces the procedure found in the following Service Manuals.

DIVISION MODEL YEAR PAGES

Buick 1988 3-7
Buick 1989 3-11

POWER STEERING SYSTEM TEST PROCEDURE





2.8/3.1L Engine
Figure 1

Tools Required:

J 5176-D Power Steering Pressure Tester
J 5176-30 Hose Assembly
J 25323-A Power Steering System Analyzer
J 38049-2 Tube Assembly
J 38049-3 Tube Nut

1. Remove fuse block shield.
2. Remove serpentine belt from power steering pump pulley.
3. Remove retaining clip from high pressure pipe.
4. Remove high pressure pipe from pump.

- Place a drain pan under vehicle to catch any fluid that may drain.

5. Position high pressure pipe towards right strut.
6. Install serpentine belt.
7. Install J 5176-D as shown in Figure 1.
8. Open the valve on J 5176-D.


9. Start engine and allow system to reach operating temperature. Stop engine and check fluid level, adding fluid if required. When system is at normal operating temperature, the pressure reading on the gage (valve open) should be under 1034 kPa (150 psi). If this pressure is above 1034 kPa (150 psi) stop engine, check the hoses for restriction.
10. Start the engine and let it idle. Close valve fully 3 times (to shut-off flow completely), and record the highest pressure attained each time. DO NOT leave valve fully CLOSED for more than 5 seconds.

a. If the pressures recorded are high and within 345 kPa (50 psi) of each other, the pump is functioning within specifications.
b. If the pressures recorded are not within 345 kPa (50 psi) of each other, the control valve in the pump is sticking. Remove, but do not disassemble the control valve assembly, clean and remove any burrs using crocus cloth or fine hone. If the system contains foreign material, flush it.
c. If the pressures recorded are within 345 kPa (50 psi) of each other, but low pressure, replace the control valve assembly and recheck. If the pressures are still low, inspect the rotor and vanes.

11. Shut off engine and remove J 5176-D.
12. Partially remove serpentine belt.
13. Install high pressure pipe to pump and close retaining clip to high pressure pipe.
14. Install serpentine belt to power steering pump pulley.
15. Install fuse block shield.
16. Bleed system and check fluid level.