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 32-42-20
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A
747-400 MAINTENANCE MANUAL
 BRAKE ROD - INSPECTION/CHECK
____________________________
 1.  General_______
 A.  This procedure contains steps to do the inspection of the brake rod. The brake rod inspection measures the fit of the inner cylinder yoke connection bolt and bushings and the brake torque arm connection bolts and bushings.
 TASK 32-42-20-206-001
 2.  Brake Rod_____________________________
-
Inspection/Check

 A.  
References

 (1)  
AMM 32-42-20/401, Brake Rod and Brake Torque Sensor

 (2)  
IPC 32-11-12-01 AND IPC 32-42-20-01

 B.  
Access

 (1)  
Location Zones
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH

 C.  
Examine the Brake Rod (Fig. 601)

 S 026-002
 (1)  
Remove the brake rod and the bolts from the airplane (AMM 32-42-20/401).

 S 226-003

 (2)  
Examine the brake rod bushings, the inner cylinder connection bolt, and the brake torque arm connection bolt for worn areas.

 (a)  
Measure the parts if it is necessary and compare the measured dimensions to the limit dimensions.

 (b)  
If the part is not in the limit dimensions, repair or replace the part as shown.

 (3)  
Install the brake rod and the connection bolts (AMM 32-42-20/401).

 S 426-004
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747-400 MAINTENANCE MANUAL
8.
BOLT/BUSHING

9.  
BUSHING/BUSHING

1. BUSHING/BOLT
INNER

(2 LOCATIONS)
CYLINDER YOKE

MAIN GEAR
2. BUSHING/BOLT TRUCK BEAM
(2 LOCATIONS) ASSEMBLY
BRAKE ROD
4.  BUSHING/BOLT
A A
(4 LOCATIONS)
BRAKE ROD

BRAKE TORQUE ARM
3. BUSHING/BOLT
INNER CYLINDER YOKE
(4 LOCATIONS) ____ THE LEFT BODY GEAR IS SHOWN, GEAR
NOTE: AT ALL OTHER LOCATIONS ARE EQUIVALENT.
5.  BUSHING/BOLT
THE TIRES, WHEELS, BRAKE UNITS AND (2 LOCATIONS)
BRAKE RODS ON THE NEAR SIDE OF THE
TRUCK ARE NOT SHOWN.

7.  BUSHING/BUSHING
6.  BOLT/BUSHING
8.  BOLT/BUSHING
2.  BUSHING/BOLT (2 LOCATIONS)
BRAKE TORQUE ARM
1.  BUSHING/BOLT (2 LOCATIONS)
9. BUSHING/BUSHING
(TURNED 90` CLOCKWISE) A-A
Wear Limits for the Brake Rod
Figure 601 (Sheet 1)

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A
747-400
MAINTENANCE MANUAL

INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  REPLACE WORN PART  REPAIR WORN PART  REPAIR INSTR 
DIAMETER  MITTED PER-DIM. WEAR 7  DIA MAX CLEAR-ANCE
MIN  MAX 
1  BUSHING  ID  1.251  1.253  1.255  0.007  X 
BOLT  OD  1.248  1.249  1.246  X  1 
2  BUSHING  ID  1.250  1.253  11.256  0.007  X 
BOLT  OD  1.248  1.249  1.249  X  1 
3  BUSHING  ID  1.7500  1.752  1.7560  0.0070  X 
BOLT  OD  1.7480  1.7490  1.7455  X  1 
4  BUSHING  ID  1.7500  1.753  1.7560  0.0070  X 
　
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