D.
Remove the Summing Lever (Fig. 402)

 S 014-007
 (1)  
Remove the summing lever and the connecting rod.

 (a)  
Remove the bolts (1 and 2) from the metering valve.

 (b)  
Remove the bolts (4 and 5) from the upper and lower mounting plates.

 (c)  
Remove the nut (6).

 (d)  
Remove the bolts (7) to disconnect the pulley brackets from the summing lever.

 (e)  
Move the input arm aft until it is clear of the metering valve.

 (f)  
Remove the bolt (8) from the input arm and pull the steering metering mechanism from the airplane.

 (g)  
Disconnect the connecting rod from the summing lever if it is necessary. 1) Remove the bolt (9) and pull the connecting rod from the

 summing lever.
 TASK 32-51-13-404-008
 3.  Steering Summing Mechanism Installation_______________________________________
 A. References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AMM 32-21-03/201, Nose Gear Torsion Links

 B.
Access

 (1)  
Location Zone 117 Electrical and Electronics Compartment, LH 118 Electrical and Electronics Compartment, RH 715 Nose Landing Gear

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

METERING VALVE ASSEMBLY
SEEA
STEERING CABLES (2 PLACES) COVER SUPPORT BRACKET
LEFT
STEERING
CYLINDER

SUMMING LEVER
CONNECTING ROD
Summing Lever Installation
Figure 402 (Sheet 1)

COVER RETAINER BOLTS (19 PLACES)
COVER
STEERING CYLINDER UPPER SUPPORT PLATE
RIGHT STEERING CYLINDER
FWD
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
STEERING COVER SUPPORT METERING
2. BOLT BRACKET VALVE
1. BOLT 
4. BOLT 
10. WASHER 
10. WASHER  5. BOLT  INPUT 
ARM 
12. WASHER  PULLEY  PULLEY 
3. BOLT  BRACKET  BRACKET 
SEE  C  CONNECTING ROD  SEE  D  SEE  B  SUMMING LEVER 
A 
UPPER SUPPORT 
UPPER 
MOUNTING 
PLATE 
SUMMING LEVER 
LOWER 
MOUNTING 
PLATE  13. BEARING 
14. WASHER 
6. NUT 
LOWER SUPPORT 
10. WASHER 
12. WASHER 
15. NUT 
11. NUT 
B 
Summing Lever Installation 
Figure 402 (Sheet 2)

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
PULLEY BRACKET
7. BOLT
SUMMING LEVER
KEY
LEFT SIDE SHOWN,
RIGHT SIDE SIMILAR

C

INPUT ARM
9. BOLT
8. BOLT
KEY
CONNECTING ROD
SUMMING LEVER
D
Summing Lever Installation Figure 402 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-51-13
　
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