Oil Pump Pressure Test - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

37A-10
Fluid level change: Within 5 mm
While engine While engine
running stopped
Pressure
gauge
Temperature
(MB990662)
gauge
Oil reservoir
Adapter
(MB990993)
Oil
pump
STEERING -
On-vehicle Service
9. If the level changes more than 5 mm, the air is badly
bled. So, bleed air again.
Caution
(1) If the fluid level rises suddenly after the engine
(2) Incomplete bleeding causes abnormal noises

OIL PUMP PRESSURE TEST

1. Disconnect the pressure hose from the oil pump, and
Shut-off valve
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
temperature of the fluid rises to approximately 50 - 60_C.
3. Start the engine and idle it at 1,000±100 r/min.
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: 8.4 - 9.0 MPa
5. If the standard value is not met, the oil pump is defective.
So, replace the oil pump. Then, measure oil pressure
again.
6. With the pressure gauge shut - off valve fully open, check
the hydraulic pressure in unladen condition.
Adapter
(MB990994)
Standard value: 0.2 - 0.8 MPa
7. If the standard value is not met, the oil line or steering
gear is probably defective. So, repair and measure oil
pressure again.
8. Turn the steering wheel fully either left or right and check
the retention hydraulic pressure.
Standard value: 8.4 - 9.0 MPa
9. If the pressure is below the standard value, disassemble
and reassemble the steering gear. If above, replace the
oil pump. Then, measure oil pressure again.
10. Remove the special tools, and tighten the pressure hose
to the specified torque.
Tightening torque: 18 ± 3 N·m
11. Bleed the system.
is stopped, the bleeding is incomplete.
from the pump and the flow-control valve. This
could lessen the life of the pump and the other
parts.