NOTE: Rigging pins are part of F70207-61
(b)
Cable tensiometer
(c)
Deleted
(d)
Ground Lock Assembly (Ref 32-00-01)
(2)
Prepare to Adjust Nose Wheel Piston Position System
(a)
Check that ground lock assembly is installed in nose gear (Ref 32-00-01).
(b)
Jack nose wheels of airplane using axle jack until nose gear tires clear ground (Ref Chapter 7).
(c)
Check that hydraulic system A is depressurized.
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(3) Adjust Nose Wheel Piston Position System
(a)
Center nose wheels by aligning marker on steering collar with marker on steering collar bearing.
(b)
Adjust piston position spring cartridge so that rigging pin 7 will fit freely in quadrant (View 1, Fig. 501). 1) Disconnect spring cartridge at crank.
NOTE: Observe position and thickness of washers for use during installation of spring cartridge.
2) Adjust length of spring cartridge upper rod end by loosening locknut,
disengaging key, and turning rod end bearing in fitting as required.
3) Install rigging pin 7 in quadrant.
4) Engage key, tighten locknut 95 to 110 pound-inches and lockwire upper rod
end.
5) Reconnect spring cartridge to crank tighten to standard torque install cotter pin.
(c)
Disconnect rudder pedal steering mechanism idler link at airplane structure (View 2).
(d)
Disconnect upper and lower torsion links at apex bolt.
(e)
Secure clutch arm so that clutch arm does not contact cam followers on eccentric crank (View 2).
(f)
Install rigging pin 5 in piston position cable drum and rigging pin 1 in quadrant.
(g)
Install rigging pin 6 in piston position ratio changer quadrant (View 3).
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(h) If new NGPPA and NGPPB cables have been installed: 1) Rig NGPPA and NGPPB cables to 120 +12 pounds at 70°F. 2) Remove rigging pins 1, 5, 6, and 7 and cycle piston position system through 25 full cycles (stop to stop) by manually displacing disconnected end of upper
torsion link vertically.
3) Connect torsion links with apex bolt.
4) Install rigging pins 1, 5, 6, and 7.
(i)
Adjust tension of all segments of cables NGPPA and NGPPB to 40 +10/-0 pounds at 70°F ambient temperature. See Table 1 for tension required for other ambient temperatures. Check that all rigging pins are loose.
(j)
Remove rigging pins 5, 6, and 7.
(k)
Release clutch arm to center eccentric crank by spring loading clutch arm against cam followers.
(l)
Adjust length of rudder pedal steering mechanism idler link so that attachment bolt fits freely. Tighten locknuts and connect idler link to airplane structure.
NOTE: After accomplishment of step (1), a small amount of misalignment at rigging pins 5, 6, and 7 is acceptable; however, with clutch arm held off cam followers on eccentric crank as in step (e), rigging pins 5, 6, and 7 must fit freely.
(m)
Install locking clips in turnbuckles of cables NGPPA and NGPPB.
(n)
Check that rigging pin 1 is removed from quadrant (view 2).
(o)
Check that rigging pin 5 is removed from piston position cable drum (view 2).
(p)
Check that rigging pin 6 is removed from piston position ratio changer quadrant (view 3).
(q)
Check that rigging pin 7 is removed from piston position quadrant assembly (view 1).
(r)
Test nose wheel steering system per par. 2.
(s)
Lower airplane and remove jacks (Ref Chapter 7, Jacking Airplane).
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C. Nose Wheel Steering System Adjustment
(1)
Equipment and Materials
(a)
Rigging Pin - 5/16-inch diameter, Type MS20392 (4 required)
NOTE: Rigging pins are part of F70207-61.
(b)
Cable tensiometer
(c)
Ground Lock Assembly - F72735-7 (Ref 32-00-01)
(d)
Rigging Protractor - F80184-1 (preferred), TE65-73762 (optional)
(2)
Prepare to Adjust Nose Wheel Steering System
(a)
Check that ground lock assembly is installed in nose gear (Ref 32-00-01).
(b)
Jack nose of airplane until nose gear tires clear ground and shock strut is fully extended (Ref Chapter 7, Jacking Airplane).
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