inch of the right 61-degree mark on the steering cap. Repeat this process with the left rudder pedal. 11. Manually turn the nose gear left, and then right to 0.3 inch beyond the 61-degree index mark on the steering cap. With the steering switch actuated, the system must be inoperative (beyond steering limits). 12. With the rudder pedals in the clean con- figuration, move the nose gear left. Then move the nose gear right to within 0.4 inch of the 61-degree limit, and operate the steering switch. The gear should return to neutral. 13. Release the weight-on-wheels switch and check to see that the nose gear steering disengages. 14. Release the steering switch, and disconnect external electrical and hydraulic power. 15. Lower the aircraft and remove jacks. 16. Close access doors and check cockpit and nose gear well for cleanliness and loose gear. Troubleshooting You can accomplish troubleshooting by studying system diagrams and related troubleshooting analysis charts. Malfunctions shown in the troubleshooting tables are in numerical order. The numbers relate to corresponding number(s) following the steps of the operational check. If trouble symptoms are known, you can accomplish troubleshooting without reference to the operational check. However, following system repair, perform an operational check to verify proper system operation. Bleeding the System Bleed the system every time you replace a part or disconnect a line. Clear the nose gear from the deck with the hydraulic and electrical power connected. Depress the nose gear steering switch and operate the rudder pedals. As the nose gear steering cylinder moves, open and close the extend and retract bleed ports. Do the same with the relief valve bleed port at the steering cylinder until the hydraulic fluid is free of air. Cycle the steering system five complete cycles. Secure the bleed ports and lockwire. Disconnect electrical and hydraulic power and remove the jack. Adjustment of Components Connect external hydraulic and electrical power to the aircraft before adjusting the steering cylinder or amplifier. Jack the nose gear clear of the deck. Adjust the steering cylinder in the following sequence: 1. Center nose gear. 2. Disconnect cylinder rod end from the steering linkage bell crank. 3. Manually extend piston and position gauge set on rod with gauge flush with rod end. Secure gauge to rod end and push flush with cylinder housing. 4. Check to see that the piston rod end will connect to the steering linkage bell crank with gear centered. Adjust the rod end as required. 5. Remove gauge set and attach piston rod end to steering linkage bell crank. To adjust the steering amplifier, proceed as follows: 1. Insert rigging pin No. 1 in rudder pedal linkage, and check to see that rudder is in neutral. 2. Operate the steering switch and check to see that gear centers within 2 degrees of center index mark. 3. If gear does not center within limits, adjust the steering amplifier potentiometer R7 so that the circuit balances. 4. Remove rigging pin and check the area for foreign objects. 5. Remove the jack and external power. NOTE: AE personnel normally accomplish the electrical adjustments. MECHANICALLY CONTROLLED NOSE STEERING SYSTEM MAINTENANCE Maintenance of mechanically controlled nose steering systems closely parallels the maintenance of electrically controlled nose steering systems. Mechan- ically controlled nose steering system maintenance consists of the rigging and steering assembly mainte- nance. See figure 12-16. Rigging Rigging of the control linkages consists of several steps. You must jack the nose of the aircraft and operate the rudder pedals to deplete hydraulic pressure. Center the recoil strut manually so that the link arm is in line with the centers of the strut and the steering assembly. Adjust all lower links to move freely overcenter, to make sure that parts are free from binding, and then lock in place with the stops. Install rigging pins in the rudder 12-16