Hydraulic System Pressure Test

Connect pressure gauge between steering pump and steering gear with valve of gauge toward steering gear side. See Fig 1 . Bleed air from system. Open valve. Start engine and operate at idle.
CAUTION: DO NOT let gauge valve close for more than 15 seconds or oil pump damage may occur.
Turn steering wheel lock to lock to increase fluid temperature to 122-140°F (50-60°C). Completely close gauge valve for 15 seconds. Increase engine speed to 1000-1500 RPM and check gauge reading against HYDRAULIC SYSTEM FLUID PRESSURE SPECIFICATIONS table.
CAUTION: DO NOT hold steering wheel against lock for more than 10 seconds or oil pump damage may occur.
To measure fluid pressure generated at gear housing, open gauge valve. Increase engine speed to 1000-1500 RPM and turn steering wheel from lock to lock. Ensure gauge pressure reading is within specification. See HYDRAULIC SYSTEM FLUID PRESSURE SPECIFICATIONS table.

HYDRAULIC SYSTEM FLUID PRESSURE SPECIFICATIONS ⁽¹⁾

Application

Pressure psi (kg/cm² )

B2600i

1351-1422 (95-100)

⁽¹⁾	Measured at 1000-1500 RPM.

Fig 1: Connecting Hydraulic System Pressure Gauge (B2600i)

Courtesy of MAZDA MOTORS CORP.