25-51-00
ú ú 03 Page 510 ú Sep 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 865-062
(15) When the modules are approximately in the middle position between the fully extended and fully retracted positions, open this P34 panel circuit breaker:
(a) 34B16, AFT CARGO LOADER DRIVE
S 215-063
(16)
Make sure the modules stop.
S 865-064
(17)
Open this P34 panel circuit breaker:
(a) 34A7, AFT CARGO LOADER CONT
S 865-065
(18) Close this P34 panel circuit breaker:
(a) 34B16, AFT CARGO LOADER DRIVE
S 215-066
(19)
Make sure the modules do not move.
S 865-067
(20)
Close this P34 panel circuit breaker:
(a) 34A7, AFT CARGO LOADER CONT
S 215-068
(21)
Make sure the modules move to the fully retracted position.
S 865-069
(22)
Hold the control switch in the UNLOAD position until the power drive motor stops, then release the switch.
S 915-070
(23)
Operate the modules from the fully retracted position to the fully extended position and back to the fully retracted position. Do this step three times.
NOTE: Do not let the power drive motor become cool before you do
____
the subsequent steps.
S 495-073
(24) AIRPLANES WITH MAGNETIC EXTEND LIMIT SWITCHES; Install a limit switch deactuator (ferrous material) on the extend limit switch actuator.
NOTE: Make sure the deactuator stays in position during the test.
____
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE CARGO LOADER SYSTEM ú
25-51-00
ú ú 08 Page 511 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 035-075
(25)
AIRPLANES WITH MECHANICAL EXTEND LIMIT SWITCHES; Remove the trigger plate assembly from the module.
S 485-112
(26)
Install a limit switch deactivator between the retract limit switch sensor and the actuator.
NOTE: Make sure the deactuator stays in position during the test.
____
S 865-077
(27)
Hold the control switch in the LOAD position.
S 215-078
(28)
Make sure the power drive motor clutch operates correctly when the modules are in the fully extended (forward) position.
NOTE: The clutch will make a high pitched sound and the power drive
____ motor will not stop if the clutch operates correctly.
S 865-079
(29)
Hold the control switch in the UNLOAD position.
S 755-080
(30)
Make sure the power drive motor clutch operates correctly when the the modules are in the fully retracted position.
NOTE: The clutch will make a high pitched sound and the power drive
____ motor will not stop if the clutch operates correctly.
S 085-083
(31)
AIRPLANES WITH MAGNETIC EXTEND LIMIT SWITCHES; Remove the limit switch deactuator (ferrous material) from the extend limit switch actuator.
S 435-085
(32)
AIRPLANES WITH MECHANICAL EXTEND LIMIT SWITCHES; Install the trigger plate assembly on the module. Make sure the engagement of the trigger plate-limit switch is correct (View A-A).
S 085-113
(33)
Remove the limit switch deactivator between the retract limit switch sensor and the actuator.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE CARGO LOADER SYSTEM ú
25-51-00
ú ú 03 Page 512 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 865-088
(34) Open this P34 panel circuit breaker and attach a DO-NOT-CLOSE tag:
(a) 34A5, CARGO DOOR CONTROL
NOTE: The cargo compartment lights will go off if they are on.
____
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