15. Lower the aircraft and remove jacks.
Operational Check
16. Close access doors and check cockpit and nose
Perform an operational check to make sure the
gear well for cleanliness and loose gear.
quality of corrective or preventive maintenance is as
expected. Use the following procedures:
Troubleshooting
1. Jack the aircraft.
You can accomplish troubleshooting by studying
2. Connect electrical power and external
system diagrams and related troubleshooting analysis
hydraulic power to the hydraulic system.
charts. Malfunctions shown in the troubleshooting
3. Manually turn the nose gear to about 30
tables are in numerical order. The numbers relate to
degrees to the right of center.
corresponding number(s) following the steps of the
operational check. If trouble symptoms are known, you
4. Operate the nose gear steering switch, and
can accomplish troubleshooting without reference to
check to see that nose gear steering does not engage.
the operational check. However, following system
5. Be sure that personnel and equipment are clear
repair, perform an operational check to verify proper
of the arresting hook. Extend the arresting gear and
system operation.
check to see that the nose gear returns to center.
Bleeding the System
6. Simulate "weight on wheels" by depressing the
switch in the left wheel well. Engage the nose gear
Bleed the system every time you replace a part or
steering and partially depress the right rudder pedal.
disconnect a line. Clear the nose gear from the deck
Check to see that the nose gear makes a partial right
with the hydraulic and electrical power connected.
turn and stops.
Depress the nose gear steering switch and operate the
7. Return the rudder pedals to neutral, and check
rudder pedals. As the nose gear steering cylinder
to see that the nose gear returns to within 0.15 inch of
moves, open and close the extend and retract bleed
the center.
ports. Do the same with the relief valve bleed port at the
steering cylinder until the hydraulic fluid is free of air.
8. Release the steering switch, and check to see
Cycle the steering system five complete cycles. Secure
that the nose gear stays in the center position.
the bleed ports and lockwire. Disconnect electrical and
9. Retract the arresting gear, and repeat steps 6
hydraulic power and remove the jack.
and 7. Move the rudder pedal partially left.
Adjustment of Components
10. Operate the steering switch, and slowly press
the right rudder pedal for a full right turn. The
Connect external hydraulic and electrical power to
triangular mark on the top front of the housing must be
the aircraft before adjusting the steering cylinder or
within 0.2 inch of the right 61-degree mark on the
amplifier. Jack the nose gear clear of the deck. Adjust
steering cap. Repeat this process with the left rudder
the steering cylinder in the following sequence:
pedal.
1. Center nose gear.
11. Manually turn the nose gear left, and then right
to 0.3 inch beyond the 61-degree index mark on the
2. Disconnect cylinder rod end from the steering
steering cap. With the steering switch actuated, the
linkage bell crank.
system must be inoperative (beyond steering limits).
3. Manually extend piston and position gauge set
12. With the rudder pedals in the clean con-
on rod with gauge flush with rod end. Secure gauge to
figuration, move the nose gear left. Then move the nose
rod end and push flush with cylinder housing.
gear right to within 0.4 inch of the 61-degree limit, and
4. Check to see that the piston rod end will con-
operate the steering switch. The gear should return to
nect to the steering linkage bell crank with gear
neutral.
centered. Adjust the rod end as required.
13. Release the weight-on-wheels switch and
5. Remove gauge set and attach piston rod end to
check to see that the nose gear steering disengages.
steering linkage bell crank.
14. Release the steering switch, and disconnect
external electrical and hydraulic power.
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