(a)
Check that total time required for nose gear to steer from centered position to stop position does not exceed 6 seconds.
(b)
Check that there is no evidence of chatter or erratic operation.
(12)
Release steering wheel.
(13)
Repeat steps (11) and (12) but steer nose gear to right. Results should be same.
(14)
Slowly push left rudder pedal forward until nose gear steering movement is first noted. Check that rudder pedal travel does not exceed 0.85 inch.
(15)
Repeat step (14) but use right rudder pedal. Result should be same.
(16)
Push left rudder pedal forward until rudder quadrant stop is contacted. Check that nose gear steers left 7-1/4 +1 degrees.
(17)
Release rudder pedal.
(a)
Check that rudder pedals return to neutral position.
(b)
Check that nose gear returns to centered position within + 1-1/4 degrees.
(18)
Repeat steps (16) and (17) but steer nose gear to right. Results should be same.
(19)
Jack nose of airplane until nose gear tires clear ground.
(20)
Operate rudder pedals and check that nose gear does not steer.
500
Sep 15/70 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-51-0 Page 511
E. Restore Airplane to Normal Configuration
(1)
Remove nose gear rigging protractor.
(2)
Install retaining bolt in upper torsion link pin.
(3)
Remove greased turning plates.
(4)
Lower airplane and remove jacks (Ref Chapter 7, Jacking Airplane).
(5)
Determine if there is further need for hydraulic power on airplane; if not, shut down source.
5B8 32-51-0 Oct 20/84 Page 512
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
STEERING METERING VALVE - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Tensiometer
B. Rigging Pin - 5/16 inch diameter
NOTE: Rigging pin is part of F70207-61.
C. Greased turning plates to allow nose wheels to steer
D. Nose Gear Rigging Protractor - TE65-73762
E. Ground Lock Assembly (Ref 32-00-01)
F. Special Wrench C32043
2. Remove Steering Metering Valve
A. Check that ground lock assembly is installed in nose gear (Ref 32-00-01).
B. Remove cover (1, Fig. 401).
C. Depressurize A hydraulic system (Ref Chapter 29).
D. Disconnect hydraulic lines and cap both lines and valve fittings.
E. Install rigging pin in steering metering valve crank (detail B).
F. Disconnect metering valve input rod (3).
G. Remove two bracket attach bolts (12).
H. Remove bracket (14).
I. Remove lockwire from retainer nuts (5).
J. Loosen retainer nuts (5).
K. Remove three attach bolts (2) at base of valve (4).
L. Remove valve (4).
CAUTION: REMOVING STEERING METERING VALVE WILL EXPOSE HYDRAULIC PASSAGES. CARE SHOULD BE TAKEN TO PREVENT CONTAMINATION, SUCH AS SAND AND DIRT, FROM ENTERING THE OPEN PASSAGES. DO NOT REMOVE SWIVELS FROM STEERING METERING VALVE.
3. Install Steering Metering Valve
A. Fill valve with hydraulic fluid and cap fittings and install new O-rings (7, Fig. 401) on sleeves (6) between metering valve (4) and cylinder (9).
B. On airplanes having swivel bolts and jamnuts (SB 32-1139), loosen metering valve swivel jamnuts and align valve ports with ports in steering cylinder trunnion.
C. Position valve (4) and install three attach bolts (2) in flange at base of valve (4). On other airplanes, remove circlips and raise, valve to gain access to retaining nuts (5).
D. Tighten retainer nuts (5) 50 to 100 pound-inches and lockwire.
E. On airplanes having swivel bolts and jamnuts, tighten swivel jamnuts finger tight and lockwire. On other airplanes, install circlips.
NOTE: A gap between the swivel and the valve body is normal in the metering valve installation.
F. Position bracket (14) and install two bracket attach bolts.
May 01/01 32-51-11 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Steering Metering Valve Installation 575
32-51-11 Figure 401 (Sheet 1) Nov 15/78
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
H80005
5B3 Steering Metering Valve Installation
May 01/99 Figure 401 (Sheet 2) 32-51-11
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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