SAFARI

22 POWER STEERING F) Fitting the housing cover 1 Fit the two round seal rings (42 and 43) in the axial groove of the housing cover (40). 1.1 Fit the housing cover (Fig-11).Position the housing cover by turning the adjusting screw (31) on the front surface of the housing in a counter – clockwise direction and screw on the sealing nut (50) temporarily. Screw in and tighten the hexagon bolts (46) with washers (47). Screw in the threaded plug (48) and tighten (refer to the technical data for the tightening torque). G) Setting the pressure Point 1. Place the torque measuring unit Tool No.4 and insert Tool no.5 on the worm. 2. Turn the steering from the one end position to the other. Measure the frictional force outside the pressure point and determine the total turn of the steering wheel. 3. Then set the frictional force in the area of the pressure point (mid position; half of the total turn of the steering wheel). The torque measuring device is turned both to the left land right of the center position and the adjusting screw should be screwed out so far until an increase in the friction torque of 40-60 Ncm compared to the value measured in point 2 is set (Figure12) . 4. Tighten the sealing nut (50) (refer to the technical data of the tightening torque), while holding the adjusting screw in a fixed position. Check the set torque once again. Fit the protective cap (70). H) . Checking the frictional torque of the completely assembled steering unit Place the torquemeasuring deviceTool no.4 and insert Tool no. 5 on the worm.Turn the steering unit form one end position to the other.Measure that frictional torque outside the pressure point in a horizontal position (refer to the technical data.) Functional test: Clamp the completely assembled steering unit on the steering test rig according to the instructions given in section VII. Bleed the steering unit (see section II) and increase the oil temperature to approximately 50 o C. Fig. 12 The adjustment values given in section VII are valid for setting pressure point of the steering system after completion of the repairs on the workbench. There is no oil in the steering unit. 1. Testing the maximum pressure: Block the steering unit in the mid position. Turn the steering wheel until the maximum pressure has built up on one side of the cylinder. For this purpose it is necessary to apply a force of 100-200N (10-20 kg) to the periphery of the steering wheel so that the maximum path of the valve is utilized. If the steering unit has no pressure limiting valve then the pressure limiting valve built into the testing rig must be set to the rated pressure which is predetermined for the steering unit (this would correspond to the rated pressure which is given on the type plate of the pump). The same measurements are now carried out in the opposite direction of the steeringwheel. If themaximum pressure is not reached within the specified tolerance, the oil leakage in the steering system is too high.