(c)
Install the two sets of fasteners that attach the ballscrew to the screw yoke: 1) Apply a layer of BMS 5-95 sealant to the threads and shanks
of the two bolts. 2) Install the bolts in the holes. 3) Install a washer and nut on each bolt. 4) Tighten the nut on each bolt to 60-85 pound-inches.
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737-300/400/500MAINTENANCE MANUAL
F. Install the ballscrew of an outboard flap transmission (Fig. 402)
S 224-034
(1)
Turn the ball nut until the "X" dimension of the ballscrew is the same as at the time of removal.
S 424-035
(2)
With the tangs on the gimbal in the direction of the screw yoke, put the aft end of the ballscrew through the gimbal.
S 434-036
(3)
Turn the ball nut until the oil reservoir is in the same position it was before the ballscrew removal (the initial position in relation to inboard or outboard).
S 424-037
(4)
Move the ballscrew back through the gimbal until the ball nut is in the gimbal.
S 434-038
(5)
Attach the gimbal to the ball nut:
(a)
On the top side of the gimbal, attach the top flanged bushing: 1) Apply a layer of MIL-C-11796, Class 3, corrosion preventive compound to the outer surface of the flanged bushing.
2) If shims were installed with the flanged bushing when you removed it, install the same thickness of shims on the bushing.
3) Apply a thin layer of the BMS 5-95 sealant around the edge of the cover that is installed with the flanged bushing. 4) Put the flanged bushing with the cover and the shims, on the gimbal.
NOTE: Make sure that the flanged bushing engages the
____ journal on the ball nut.
5) Install the two bolts.
(b) On the bottom side of the gimbal, attach the bottom flanged bushing: 1) Apply a layer of MIL-C-11796, Class 3, corrosion preventive
compound to the outer surface of the flanged bushing.
2) If shims were installed with the flanged bushing when you removed it, install the same thickness of shims on the bushing.
3) Put the flanged bushing, with the shims, on the gimbal.
NOTE: Make sure that the flanged bushing engages the
____ journal on the ball nut.
4) Install the two bolts.
(c) Do a check that the total clearance is .006 + .004/-.000 inch between the flanged bushings and the ball nut (Fig. 402).
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737-300/400/500MAINTENANCE MANUAL
(d)
If it is necessary, adjust the thickness of the shims at the flanged bushings to get the .006 + .004/- .000 inch of total clearance.
(e)
On the top and bottom sides of the gimbal, install the lockwires.
S 424-039
(6) Put the ballscrew with the screw yoke and the gimbal in its installed position on the airplane.
NOTE: Make sure the oil reservoir is in its initial position (in
____
relation to inboard or outboard).
S 434-040
(7)
Attach the gimbal to the fitting on the midflap:
(a)
On each gimbal, attach the flanged bushing to the gimbal.
1) Install the shims with the flanged bushing that the shims were initially installed with.
NOTE: This is necessary to keep the initial lateral
____ position adjustment of the ballscrew.
2) Apply a layer of MIL-C-11796, Class 3, corrosion preventive compound to the outer surface of the flanged bushing. 3) Put the flanged bushing, with the shims on the fitting of the midflap.
NOTE: Make sure that the flanged bushing engages the
____
journal on the gimbal.
4) Install the three screws with washers and nuts.
(b)
Do a check that the total clearance is .006 +.004/-.000 inch between the flanged bushings and the gimbal (Fig. 402).
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