12-21-21
 ALL  ú
 ú  01.1  Page 302
 ú  Sep 28/02 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

757 MAINTENANCE MANUAL
 NO. 1 AND 2 CARGO DOORS - SERVICING
___________________________________
 1.  General
_______
 A.  This procedure gives instructions to lubricate the No. 1 and 2 cargo doors.
 TASK 12-21-22-643-002
 2.  Lubricate the No. 1 and 2 Cargo Doors
_____________________________________
 A. Consumable Materials ú (1) D00633 Grease - BMS 3-33 (Recommended) ú (2) D00013 Grease, MIL-G-23827 (Alternative)
 B.  References
 (1) 52-34-00/601, No. 1 and 2 Cargo Door Inspection/Check.
 C.  Access
 (1)  Location Zones
 821 No. 1 Cargo Door
 822 No. 2 Cargo Door

 D.  Procedure - Lubricate the No. 1 and 2 Cargo Doors
 S 643-003
 CAUTION: BE CAREFUL WHEN YOU DISENGAGE THE GREASE GUN FROM THE
_______ LUBRICATION FITTING. DAMAGE TO THE LUBRICATION FITTING CAN EASILY OCCUR.
 (1) Lubricate the No. 1 and 2 cargo doors as shown on Fig. 301.
 NOTE: Turn the rod ends on the pushrod to get access to the
____ lubrication fittings if necessary (Ref 52-34-00).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-22
 ALL  ú ú 01.1 Page 301 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
NO. 1 CARGO DOOR
SEE A
NO. 2 
CARGO DOOR 
SEE  A  CARGO DOOR HINGE 
SEE  B  SHT 2 

CARGO DOOR LATCH MECHANISM
SEE C SHT 3
FWD
NO. 1 OR NO. 2 CARGO DOOR (SHOWN WITH THE DOOR OPEN)
A
No. 1 and No. 2 Cargo Door Lubrication Figure 301 (Sheet 1)
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 12-21-22
 ALL  ú ú 01 Page 302 ú Dec 20/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

PROGRAM ROD AND ADJUSTMENT ROD END
FLUSH
BMS 3-33
(4 LOCATIONS)
PROGRAM ROD AND ADJUSTMENT ROD END
FLUSH
BMS 3-33
(4 LOCATIONS)
CARGO DOOR HINGE
(SHOWN WITH THE DOOR OPEN)

8 POINTS

B

No. 1 and No. 2 Cargo Door Lubrication
Figure 301 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

757
MAINTENANCE MANUAL

2 UPPER GUIDE ROLLER FLUSH (2 LOCATIONS) BMS 3-33  BMS 3-33 STOP FITTING PIVOT PINS FLUSH (2 LOCATIONS) 
OPERATING MECHANISM 
SEE  D  SHT 4 
LATCHING MECHANISM 
SEE  E  SHT 4 
ROLLER LOCKOUT PAWL FLUSH 
1  (2 LOCATIONS) BMS 3-33 
FWD  1  LATCH CRANK ROLLER FLUSH 
1  ROLLER LOWER GUIDE FLUSH  (2 LOCATIONS) BMS 3-33 
(2 LOCATIONS) 2 BMS 3-33 
(SHOWN WITH THE DOOR CLOSED) CARGO DOOR LATCH MECHANISM (VIEW IN THE OUTBOARD DIRECTION) 
10 POINTS 
1 2  BEARINGS. DOOR BECAUSE THE NO. 2 CARGO DOOR HAS SELF-LUBRICATED TO THE UPPER AND LOWER GUIDE ROLLER ON THE NO. 2 CARGO ROLLER ON THE NO. 1 CARGO DOOR. DO NOT APPLY LUBRICANT YOU MUST APPLY LUBRICANT TO THE UPPER AND LOWER GUIDE (NOT SHOWN) ONE MORE LUBE POINT IS ON THE OPPOSITE SIDE C 
Figure 301 (Sheet 3) No. 1 and No. 2 Cargo Doorubrication 

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