Checking Hydraulic System

Before starting, check belt tension, driving pulley and tire pressure.

1. Set Tool. Open shut-off valve. Then bleed air.

   Refer to "BLEEDING HYDRAULIC SYSTEM " .

2. Run engine, at idle speed or 1,000 rpm.

   Make sure fluid temperature in reservoir tank rises to 60 to 80°C (140 to 176°F). 

   WARNING: Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed, fluid pressure in the power steering pump increase to maximum. This will raise fluid temperature abnormally.
   Fig 1: Checking Hydraulic System

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check pressure with steering wheel fully turned to left and right positions with engine idling at 1,000 rpm.
   CAUTION: Do not hold the steering wheel in a locked position for more than 15 seconds.

   Power steering pump maximum operating pressure: 

   1. 8,630 - 9,219 kPa 
      1. (88 - 94 kg/cm ²  , 1,251 - 1,337 psi) 
   • If pressure reaches maximum operating pressure, system is OK.
   • If pressure increases above maximum operating pressure, check power steering pump flow control valve. Refer to DISASSEMBLY .
4. If power steering pressure is below the maximum operating pressure, slowly close shut-off valve and check pressure again.
   CAUTION: Do not close shut-off valve for more than 15 seconds.
   • If pressure increases to maximum operating pressure, gear should be damaged. Refer to "REMOVAL AND INSTALLATION " .
   • If pressure remains below maximum operating pressure, pump should be damaged. Refer to "DISASSEMBLY " .
5. After checking hydraulic system, remove Tool and add fluid as necessary. Then completely bleed air out of system. Refer to BLEEDING HYDRAULIC SYSTEM .