MAIN CARGO DOOR LUBRICATION
1. General
A. This procedure provides instructions for lubricating the main cargo doors.
2. Equipment and Materials
A. Lubrication Set -Entry, Cargo, Service, and Galley Door Camshaft Bearings -F72942-1
NOTE: Lubrication set may be used to reach lubrication fittings where access is difficult.
B. Flush gun (grease gun)
C. Oil spray can
D. Grease -BMS 3-33, preferred (Ref. 20-30-21)
E. Grease -MIL-G-23827, alternate (Ref 20-30-21)
F. Oil -BMS 3-23 (Ref 20-30-21)
G. Personnel Safety Barrier -F70258-1
H. Maintenance Stand
3. Service Cargo Door
A. Open the main cargo door until you can remove the door ceiling panels (Ref 52-32-0).
B. Install Personnel Safety Barrier -F70258-1.
WARNING:  BE CAREFUL WHEN YOU ARE NEAR THE DOOR OPENING. IF YOU FALL THROUGH THE DOOR OPENING, INJURY WILL OCCUR.
C. Remove the door ceiling panels (Ref 52-32-81).
D. Lubricate the door as shown in Fig. 201.
NOTE: A maintenance stand is required to lubricate the main cargo door hinges.
E. Install the door ceiling panels (Ref 52-32-81).
F. Remove Personnel Safety Barrier -F70258-1.
WARNING:  BE CAREFUL WHEN YOU ARE NEAR THE DOOR OPENING. IF YOU FALL THROUGH THE DOOR OPENING, INJURY WILL OCCUR.
G. Close and lock the main cargo door (Ref 52-32-0).
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H21700 H21708
Main Cargo Door Lubrication  500 
12-25-101  Figure 201 (Sheet 1)  May 01/01 
Page 202 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Main Cargo Door Installation 
May 01/01  Figure 201 (Sheet 2)  12-25-101 
Page 203 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Main Cargo Door Lubrication  500 
12-25-101  Figure 201 (Sheet 3)  May 01/01 
Page 204 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Main Cargo Door Lubrication 
Oct 20/89  Figure 201 (Sheet 4)  12-25-101 
Page 205 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

FORWARD AIRSTAIR DOOR LUBRICATION
EFFECTIVITY
Airplanes with Forward Airstair

1.  General
A.  This procedure provides instructions for lubricating the forward airstair door.
2.  Equipment and Materials
A.  Flush gun (grease gun)
B.  Grease -BMS 3-33, preferred (Ref. 20-30-21)
C.  Grease -MIL-G-23827, alternate (Ref. 20-30-21)
D.  Grease -BMS 3-24, alternate (Ref. 20-30-21)
E.  Grease -DC-33 (Ref. 20-30-21)
3.  Lubricate Forward Airstair Door
A.  Gain access to work area through electronic equipment compartment access door.
B.  Remove forward airstair door standby system meter (Ref. 52-61-591).
C.  Manually position airstair door to locate door carriage rollers opposite 0.5-inch lubrication access hole in guide rail.
D.  Lubricate airstair door as shown (Fig. 201).
E.  Lubricate Forward Airstair Door Lock Mechanism Interior and Exterior Control Cables
(1)  
Remove interior and exterior control cables (Fig. 201, Detail C). Replace cables if corroded or worn (Ref. 52-61-531).

(2)  
Wipe all old lubricant and foreign material from cables.

(3)  
Hand lubricate complete cable assemblies with BMS 3-24 grease.

(4)  
Install cable assemblies (Ref. 52-61-531).

F.  Manually close and lock airstair door.
G.  Install forward airstair door standby system motor (Ref. 52-61-591).
May 01/01 12-25-111 Page 201
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