A 1 (2 LOCATIONS) AFT MOUNTING BOLT FWD BALLSCREW
FLAP TRACK (2 LOCATIONS) FORWARD MOUNTING BOLT SEE A BSEE TORQUE TUBE COUPLING INBD TRANSMISSION NO. 1 AND 8 (2 LOCATIONS) BOLT
SCREW YOKE
(2 LOCATIONS) BOLT
1 (2 LOCATIONS) AFT MOUNTING BOLT FWD BALLSCREW
INBD TRANSMISSION NO. 2 AND 7 C PORT FILLER
Figure 401 (Sheet 1) Flap Transmission Installation
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
TORQUE TUBE
COUPLING
TORQUE TUBE COUPLING
SEE B SEE B
MOUNTING BOLT
(2 LOCATIONS) SCREW YOKE
BOLT MOUNTING BOLT
(2 LOCATIONS) (2 LOCATIONS)
BALLSCREW
FWD
INBD
FLAP TRACK
TRANSMISSION NO. 3 AND 6
TORQUE TUBE
COUPLINGS
SEE B
BALLSCREW TORQUE TUBE
SCREW YOKE SLEEVE
BOLT
COUPLING
TORQUE TUBE COUPLING
MOUNTING BOLT FLAP TRACK
(4 LOCATIONS) B
INBD
1
PUT THE WASHERS UNDER THE HEAD
OF THE BOLT SO THAT THE BOLT END FWD
IS THROUGH THE NUT 0.08 TO 0.12 INCH AFTER TIGHTENING
TRANSMISSION NO. 4 AND 5
Flap Transmission Installation
Figure 401 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 224-006
CAUTION: MAKE SURE THE ANGULAR CLEARANCE IS 1/4 TO 5/6 TURNS IF YOU HAVE
_______ MADE LATERAL TRIM CORRECTIONS. A DIMENSION X NOT IN THIS LIMIT CAN CAUSE DAMAGE TO THE FLAP.
(5)
Measure the angular clearance between the upstop on the ballscrew nut and the upstop on the ballscrew (Fig. 402):
(a)
Make sure the angular clearance is 170 to 190 degrees (1/2 turn |10 degrees) (1/4 to 5/6 turn if you have made lateral trim corrections with the flaps).
(b)
Make a record of the angular clearance.
S 864-007
(6)
Supply the system B hydraulic power (Ref 27-51-00/201).
S 864-008
(7)
Move the flap control lever to the 40-unit detent to extend the flaps.
S 864-009
(8)
Remove the system B hydraulic power (Ref 27-51-00/201).
S 494-010
(9)
Install a support to hold the flaps when the transmissions are removed.
D.
Remove an Outboard Transmission (No. 1, 2, 7 or 8)
S 034-011
(1)
Disconnect the ballscrew nut from the gimbal (Fig. 402):
(a)
Remove the four bolts from the top and bottom surface of the gimbal to remove the gimbal bushings. 1) Remove the top and bottom gimbal bushings from the gimbal. 2) Make a record of the location and thickness of the shims.
S 034-012
(2)
Disconnect the torque tubes from the flap transmission (Fig. 401):
(a)
Remove the screws that attach the coupling sleeve to the coupling on the transmission.
(b)
Move the coupling sleeves off the coupling.
(c)
Disconnect the torque tube from the coupling.
S 034-013
(3) If it is necessary, remove the two cross bolts between the universal joint and the ballscrew upstop to disconnect the ballscrew from the transmission.
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