B.
Access

 (1)  
Location Zones
 105 Forward Entry Door

 C.
Procedure

 S 864-002-B00
 (1)  
Open the door sufficiently to remove the diaphragm seal.

 S 034-008-B00

 (2)  
Remove the bolt that holds the control rod to the gate.

 S 024-003-B00

 (3)  
Remove the diaphragm seal.

 (a)  
Push the gate outboard.

 (b)  
Look to see if the diaphragm seals are held with nylon rods or seal angles.

 (c)  
Remove the applicable nylon rods or seal angles.

 WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
_______ EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM MEK. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE MEK. KEEP MEK AWAY FROM SPARKS, FLAME AND HEAT. MEK IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY OR DAMAGE.
 (d)  
Use MEK to remove the old adhesive that holds the diaphragm seal to the door structure.

 (e)  
Pull the diaphragm seal off the door.

 TASK 52-09-11-404-004-B00
 3.  Diaphragm Seal Installation___________________________
 A. Consumable Materials
 (1)  A00140 Compound-Sealing, BMS 5-19, Class B
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-09-11
 ALL  ú ú B01 Page 401 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
A
A
SEAL 
SOCKET  BULB SEAL 
DOOR GATE 
DOOR GATE  (CLOSED) 

DIAPHRAGM
SEAL SEAL ANGLE
GATE HINGE DIAPHRAGM SEAL
DOOR STRUCTURE DOOR GATE
NYLON (OPEN) RODS
GATE HINGE INBD INBDSEALANT
DOOR STRUCTURE
INSTALLATION WITH SEAL SOCKET INSTALLATION WITH SEAL ANGLE A-A A-A
Diaphragm Seal Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-09-11
 ALL  ú ú B01 Page 402 ú Jul 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (2)  
B00148 Solvent - Methyl Ethyl Ketone, TT-M-261

 B.
Access

 (1)  
Location Zone
 101 Forward Entry Door

 C.
Procedure

 S 114-010-B00
 WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
_______ EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM MEK. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE MEK. KEEP MEK AWAY FROM SPARKS, FLAME AND HEAT. MEK IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY OR DAMAGE.
 (1)  
Remove grease, oil, dirt, or adhesive from the surfaces the seal touches with MEK and a clean cloth.

 S 424-006-B00

 (2)  
Install the diaphagm seal.

 (a)  
Put the diaphragm seal on the door along the hinge of the door gate.

 (b)  
Use the nylon rods to install the diaphragm seal. 1) Make sure the diameter of the seal socket is from 0.122 to

 0.132 inch.
 a) Replace the seal socket if the diameter is not correct. 2) Push the diaphragm seal into the seal socket. 3) Push the nylon rods into the seal socket to hold the
 diaphragm seal in its position.
 NOTE: Liquid soap is a good lubricant for the
____
 nylon rods.

 (c)  Use the seal angle to install the diaphragm seal. 1) Make holes in the diaphragm seal that align with the holes in the seal angle. 2) Put the sealant between the diaphragm seal, the door and
 the door gate. 3) Put the seal angle on the diaphragm seal with the screws. 4) Tighten the screws until the seal angle compresses the
 diaphragm seal.
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