(2)
An operational test of the parking brake system,
(3)
A parking brake hold check.
B.
When the parking brake lever is pulled to the set position, adjust the parking brake system. The parking brake system is adjusted to hold the brakes at a specified pressure. Adjustment can be necessary after the adjustment of the pedal linkage or after the replacement of the parking brake linkage. The adjustment of the pawls is necessary to control the pressure on the brakes with the parking brake set. To adjust the parking brake lever, adjust the pushrods and set a bumper stop.
TASK 32-44-00-825-013
2. Adjustment - Parking Brake System_________________________________
A. Special Tools and Equipment
(1)
G12001-46 - Kit, Rig Pin
B.
References
(1)
AMM 76-11-03/201, Control Stand
(2)
AIPC 32-44-60 Fig. 1
C.
Access
(1)
Location Zone 211 Passenger Cabin - Nose to First Door, L.H. 221 Control Cabin, L.H.
D.
Preconditions
S 865-048
(1)
These conditions are necessary for this task:
(a)
Electrical power is available (AMM 24-22-00/201).
(b)
The Integrated Display System is serviceable (AMM 31-61-00/501).
E.
Prepare to Adjust the Parking Brake System
(1)
Make sure that chocks are installed at all wheels.
(2)
Set the parking brake.
S 495-014
S 865-015
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32-44-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
UPPER DECK FLOOR
NO. 1 ENTRY DOOR
SEE A
PARKING BRAKE LEVER
A
ROD ASSEMBLY
SEE GPILOT'S CONTROL STAND
A
CAPTAIN'S
RH PEDAL
CAPTAIN'S
LH PEDAL
RIG PIN NO. 1 HOLE (RIG PIN NO. 2 ON RIGHT SHAFT)
PAWL
LOCK PIN
BUMPER STOP
PAWL STOP
SEEB C DE SEE F
BRAKE-PEDAL
BUS-CRANK
ASSEMBLY
A
Parking Brake System - Adjustment/Test
Figure 501 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
LOCKPIN
Parking Brake System - Adjustment/Test Figure 501 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-44-00
ALL ú ú 01 Page 503 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
Parking Brake System - Adjustment/Test
Figure 501 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-44-00
ALL ú ú 01 Page 504 ú Jun 10/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
Parking Brake System Adjustment/Test
Figure 501 (Sheet 4)
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