POWER STEERING 3B1-5 ON-VEHICLE SERVICE Power Steering System N3A0118E Legend 1. From oil pump 2. To steering unit Preparation Inspect the fluid reservoir for proper fluid level. Standard Operating Pressure NQR without HBB: 11,278 kPa (115 kg/cm 2 /1,635 psi) Inspect the pump belt for proper tension. System Test Procedure NPR/NPS/NQR, with HBB: 10,787 kPa (110 kg/ cm 2 /1,563 psi) 1. Place a container under the pump to catch the fluid when disconnecting or connecting the hoses. 2. With the engine NOT running, install the power steering fluid pressure gauge unit between the power steering unit and discharge side of oil pump. The gauge must be between the stop valve and oil pump. Gauge kit:
5-8840-0162-1 3. Check the fluid level. Fill the reservoir with Dexron ® -III to “Full” mark. Check the connections at gauge kit for leakage. 4. Fully open the stop valve, and bleed the system. Refer to “Power Steering System Bleeding” of this section. 5. Start the engine and being idled, and raise oil tem- perature to 50 — 60 ° C (122 — 144 ° F). Check the fluid level again. Fill the reservoir with Dexron ® -III to “Full” mark if required. 6. Hold the steering wheel in the forward position. Fully close the stop valve, and record the highest value of fluid pressure. except Above Models: 10,297 kPa (105 kg/cm 2 / 1,493 psi) HBB:
Hydraulic Booster Brake If the pressure recorded is within specified range, the steering system is functioning within its specifi- cations. If the pressure recorded is higher than specified range, oil pump relief valve is defective. If the pressure recorded is lower than specified range, oil pump or relief valve is defective. 7. Fully open the stop valve and keep engine idled. Turn and hold steering wheel to full left lock, and record the highest value of fluid pressure. Turn and hold steering wheel to full right lock, and record the highest value of fluid pressure. Caution: Do not continue this test. It should be done within 5 sec- onds. Standard Operating Pressure Caution:
Do not continue this test. It should be done within 10 seconds, because otherwise oil temperature would rise to excess to cause trouble. NQR without HBB: 11,278 kPa (115 kg/cm 2 /1,635 psi) NPR/NPS/NQR, with HBB: 10,787 kPa (110 kg/ cm 2 /1,563 psi)