Hydraulic System Pressure Test

Connect a 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 let idle.
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.
NOTE: Oil pump damage may result if gauge valve is closed for more than 15 seconds.
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. Gauge pressure reading must be within specification. See HYDRAULIC SYSTEM FLUID PRESSURE SPECIFICATIONS table.

CAUTION: DO NOT keep steering wheel fully turned for more than 10 seconds.

HYDRAULIC SYSTEM FLUID PRESSURE SPECIFICATIONS ⁽¹⁾

Application

Pressure psi (kg/cm² )

B2200

1244-1351 (87.5-95)

B2600i

1351-1422 (95-100)

⁽¹⁾	Measured at 1000-1500 RPM.

Fig 1: Connecting Hydraulic System Pressure Gauge (B2200)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Connecting Hydraulic System Pressure Gauge (B2600i)

Courtesy of MAZDA MOTORS CORP.