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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

REMOVE THE FILL AND OIL LEVEL CHECK PORTS, FILL THE MOTOR THROUGH THE FILL PORT UNTIL FLUID

DRAINS FROM THE LOWER LEVEL CHECK PORT.
REMOVE THE ACCESS COVER AND BUTTER LUBRICATE THE BEVEL GEARS. TURN THE SHAFT TO APPLY THE GREASE
EVENLY OVER THE GEAR TEETH.

FILL TO THE LEVEL OF THE ACCESS COVER WITH APPROXIMATELY TWO POUNDS OF GREASE.

AFTER YOU FILL, CYCLE THE FLAPS AND CHECK THE FLUID LEVEL AGAIN. IF THE GEARS ARE NOT TURNED,
THE FLUID LEVEL INDICATION CAN BE INCORRECT.
NOT USED
NOT USED
AIRPLANES WITH LUBRICATION HOLES IN THE TORQUE TUBE COUPLING;

MOVE THE TORQUE TUBE AXIALLY FULL TRAVEL TOWARD THE END YOU LUBRICATE. FILL A MINIMUM OF TWO

LUBRICATION HOLES WITH GREASE.
AIRPLANES WITHOUT LUBRICATION HOLES IN THE TORQUE TUBE COUPLING;
DISCONNECT THE COUPLING AND APPLY A LIGHT FILM OF GREASE TO THE FULL LENGTH OF THE INTERNAL
SPLINES AND RECONNECT THE TORQUE TUBE COUPLING.

_______ AIRPLANES WITHOUT LUBRICATION HOLES IN THE TORQUE TUBE COUPLING;

CAUTION: THE COUPLING MUST BE DISCONNECTED TO LUBRICATE THE SPLINES. MAKE SURE YOU DO NOT MOVE THE FLAP SYSTEM DRIVE SHAFTS AND TRANSMISSIONS WHILE THE COUPLINGS ARE DISCONNECTED, SINCE FLAP SYSTEM ADJUSTMENT WILL BE CHANGED. YOU MUST ADJUST THE FLAP SYSTEM IF MOVEMENT OCCURS WHILE THE COUPLINGS ARE DISCONNECTED (AMM 27-51-00/501).
BMS 3-33 PREFERRED;
MIL-G-21164, MIL-G-23827 OPTIONAL.

FILL TO THE LEVEL OF THE FILLER PORT.

REMOVE THE COVER ON THE AFT SIDE OF THE TRANSMITTER GEARBOX TO GET ACCESS TO THE GEARS.
APPLY A FULL LAYER OF GREASE TO THE GEARS. DO NOT COMPLETELY FILL THE GEARBOX WITH GREASE.

ONE MORE LUBE POINT IS ON THE OPPOSITE SIDE (NOT SHOWN).

AIRPLANES WITH A 10-60751 ELECTRIC MOTOR

AIRPLANES WITH A S256T011 ELECTRIC MOTOR

Trailing Edge Flap Drive System Lubrication
Figure 301 (Sheet 7)

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A

737-300/400/500
MAINTENANCE MANUAL

SEE G
SEE A
SEE  A 
MIDFLAP CARRIAGE SEE C  FOREFLAP TRACK 
(3 LOCATIONS) 1 BMS 3-33 

FWD
AFTFLAP

EXHAUST GATE TRACK INBD ACTUATOR SEE B
MECHANISM SEE F
3 POINTS A
____UNLESS OTHERWISE NOTED, YOU CAN GET
NOTE: ACCESS TO ALL OF THE LUBRICATION POINTS WHEN THE FLAPS ARE EXTENDED.
Outboard Trailing Edge Flap Lubrication
Figure 302 (Sheet 1)

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A

737-300/400/500MAINTENANCE MANUAL 
AFTFLAP TRACK
 BMS 3-33 
FLIGHT ROLLER 
(1 LOCATION) 
FLUSH 
1 
FLIGHT ROLLERS  FWD  BMS 3-33 
FLUSH  (1 LOCATION) 
10 
BMS 3-33  INBD
(2 LOCATIONS)  4 POINTS 
9  10 
B 
FLAP TRACK 
FOREFLAP TOGGLE 
SEE E 
BMS 3-33  CARRIAGE 
(1 LOCATION)  SPINDLE 
1  SEE  D 

ROLLERS
11
FLUSH11
BMS 3-33 (4 LOCATIONS)
FWD
CAM FOLLOWER ROLLERS FLUSH 
____NOTE:  ALL ROLLERS IN THIS AREA. MAKE SURE YOU LUBRICATE  C 8 POINTS  (3 LOCATIONS) BMS 3-33 102 4 
Outboard Trailing Edge Flap Lubrication Figure 302 (Sheet 2) 

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FLAP TRACK CAM
BMS 3-33
(2 LOCATIONS)
　
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