Mitsubishi 3000GT 1991 Service Manual page 839

STEERING
Pressure gauge (FuW dose)
Temperature
OIL PUMP PRESSURE TEST
Shut-off valve
CHECKING THE OIL PUMP RELIEF PRESSURE
1. Disconnect the pressure hose from the oil pump, and then
connect the special tools.
2. Bleed the air, and then turn the steering wheel several
times while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50 - 60°C (122 -
140°F).
3. Start the engine and idle it at 1,000 + 100 rpm.
4. Fully close the shut-off valve of the pressure gauge and
measure the oil pump relief pressure to confirm that it is
within the standard value range.
Standard value: 7.5 - 8.2 MPa (1,067 - 1,166 psi)
Caution
Pressure gauge shut off valve must not remain closed
for more than 10 seconds.
5. If it is not within the standard value, overhaul the oil pump.
6. Remove the special tools, and then tighten the pressure
hose to the specified torque.
7. Bleed the system.
CHECKING THE PRESSURE UNDER NO-LOAD CONDI-
Shut-off valve
TIONS
Disconnect the pressure hose from the oil pump, and then
1.
connect the special tool.
Bleed the air, and then turn the steering wheel several
2.
times while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50 - 60°C (122 -
140°F).
3. Start the engine and idle it at 1,000 + 100 rpm.
Check whether or not the hydraulic pressure is the standard
4.
value when no-load conditions are created by fully opening
the shut-off valve of the pressure gauge.
Standard value: 0.8 - 1.0 MPa (114 - 142 psi)
Limit: 1.5 MPa (213 psi)
5. If it is not within the standard value, the probable cause is a
malfunction of the oil line or steering gear box, so check
these parts and repair as necessary.
Remove the special tools, and then tighten the pressure
6.
hose to the specified torque.
7. Bleed the system.
TSB Revision