Pre-Adjustment Testing

On all models, connect a pressure gauge between steering pump and steering gear. See Fig 1 . Make sure fluid in reservoir is at level mark. Place pressure gauge so it can be seen from the driver's seat.

Fig 1: Pressure Gauge Test Set Up Make sure fluid level is at full mark when testing.
Remove steering wheel impact guard on 760 GLE models by lifting lower edge and pulling out. On all other models, remove by compressing sides slightly. On all models, install a torque wrench on steering wheel nut.
With engine at idle, turn steering wheel (using torque wrench) slowly to the right. Read torque when pressure reaches 171 psi (12 kg/cm² ) on cam gear type, 285 psi (20 kg/cm² ) for ZF steering gear.
Repeat operation turning wheel to left. Torque should be 2.6-3.3 ft. lbs. (3.5-4.5 N.m) as gear approaches specified pressure.
Difference between both sides must not exceed 9 INCH lbs. (1 N.m) on cam gear type. Difference must not exceed 4.4 INCH lbs. (.5 N.m) on ZF steering gear.
If difference exceeds specifications on 760 GLE models, the steering gear must be reconditioned or a new one installed. Adjustments can be made on DL, GL and Turbo models if specifications are not meet. Adjust with the following adjustment procedure.