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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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