737 AMM 飞机维护手册 起落架 LANDING GEAR(96)

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3.  Install Main Gear Downlock Springs
A.  Place forward downlock spring in position with long shaft end inboard (Fig. 401).
B.  Install inboard attachment bolt and spacers.
C.  Install spring expander on forward downlock spring and stretch spring to fit.
D.  Connect spring to outboard attachment.
E.  Install nut and washer.
F.  Place aft downlock spring in position with long shaft end inboard.
G.  Connect outboard end of spring and install nut and washer.
H.  Install spring expander on aft downlock spring and stretch spring to fit.
I.  Connect inboard end of spring.
J.  Tighten outboard nut 100 to 150 pound-inches and install cotter pins to attachments.
K.  Butter lubricate washer surface, shank, threads and thread relief groove with grease. Install nut and washers on inboard attachment bolt. Tighten nut hand tight and slack off, if necessary, to the nearest castellation to install cotter pin.
Sep 01/02 32-32-91 Page 401 B
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Main Gear Downlock Springs Installation  500 
32-32-91  Figure 401  Aug 15/76 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

MAIN GEAR BEAM HANGER SHAFT - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Ground Lock Assembly - F72735 (Ref 32-00-01)
B.  Grease - MIL-G-21164 or MIL-G-23827 optional to BMS 3-33
C.  Primer - BMS 10-11, Type I
2.  Prepare for Removal
A.  Check that landing gear ground lock assemblies (Ref 32-00-01) are installed in all gear and depressurize hydraulic system.
B.  Remove hydraulic access panels 8401 left or 8501 right.
C.  Disconnect outer wing door pushrod (12, Fig. 401) from trunnion link (11).
D.  Disconnect bonding cable (13) from structure.
E.  Remove wing door hinge bolts (9) complete with outer wing door (14) then remove stabilizing beam (10) from airplane.
F.  Disconnect inboard end of actuator walking beam (1) from walking beam arm (8).
3.  Remove Main Gear Beam Hanger Shaft
A.  Support actuator assembly and remove bolts securing tube assembly (4, Fig. 401) to structure.
B.  Lower outboard end of actuator assembly to obtain access to tube assembly (4).
C.  Take particular note of the number and position of spacers (16) at each end of the tube assembly (4).
D.  Unscrew stud assembly (18) from forward end of tube assembly (4) and remove tube.
502 
Sep 01/02  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-32-101 Page 401 

Main Gear Beam Hanger Shaft Installation  500 
32-32-101  Figure 401 (Sheet 1)  Feb 20/94 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

505  Main Gear Beam Hanger Shaft Installation 
Aug 01/94  Figure 401 (Sheet 2)  32-32-101 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

4.  Install Main Gear Beam Hanger Shaft
A.  Clean and lubricate tube assembly (4) and stud assembly (18) with grease.
WARNING:  USE NITRILE GLOVES FOR SKIN PROTECTION AGAINST BMS 3-27 (MASTINOX 6856K). IF MASTINOX GETS ON YOUR SKIN, IMMEDIATELY REMOVE IT WITH WATER. IF THIS MATERIAL GETS IN YOUR EYES, IMMEDIATELY FLUSH YOUR EYES WITH WATER AND GET MEDICAL AID. THIS MATERIAL CONTAINS VERY POISONOUS AND FLAMMABLE AGENTS WHICH CAN CAUSE INJURIES TO PERSONS.
CAUTION:  UNWANTED MASTINOX MUST BE REMOVED FROM SURFACES WHICH WILL BE GREASED. APPLICATION OF MASTINOX TO JOINTS THAT TURN COULD CAUSE FAILURE OF THE LANDING GEAR TO EXTEND OR RETRACT.
NOTE: 1.  Parts which are not lubricated after installation must be coated with Mastinox 856K.
2.  Parts which are lubricated after installation must be lubricated with Aero Shell 07.
B.  Assemble tube assembly (4), spacer(s) (16), and stud assembly (18) as shown in detail C. Tighten stud assembly finger-tight.
C.  Make sure the head of the actuator/walking beam attachment bolt (3) will be aft when the assembly is installed.
D.  Place tube assembly (4) in brackets on structure leaving attachment bolts finger-tight.
　
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