Steering Gear Retention Hydraulic Pressure Inspection

The following procedures require the use of oil pressure gauge assembly tool No. MB990662, or equivalent, power steering oil pressure gauge pump side adapter tool No. MB990993-01 and power steering oil pressure gauge hose side adapter tool No. MB990994-01, or equivalent.

Fig. 5 Pressure Gauge Installation:

1. Disconnect pressure hose from oil pump then connect special tools as shown, Fig. 5.
2. Bleed air from system, then turn steering wheel from stop to stop until fluid temperature in reservoir is 122-140°F.
3. Start engine and run at 900-1100 RPM.
4. Fully close, then fully open shutoff valve.
5. Turn steering wheel from stop to stop, then ensure retention pressure is as specified in "Power Steering Pressure Specifications".
6. If pressure is not as specified, service steering gearbox and repeat steps for establishing correct retention pressure.
7. Remove special tools and bleed system.