S 028-048-C00
(3)
Remove the lever arm and bushing.
(a)
Hold the lever arm with the countertorque tool to make sure the vane does not turn.
(b)
Remove the nut and washer from the vane stem.
(c)
Use the lever arm puller to remove the lever arm from the vane.
(d)
If it is necessary, remove the bushing from the stator case.
(e)
If you install the shims, remove and discard the shims from the 3rd-stage vanes.
S 428-049-C00
(4) Install the lever arm and bushing (Fig. 801)
(a)
If it is necessary, install a new bushing in the stator case.
(b)
Install the lever arm as follows:
CAUTION: YOU MUST ALIGN THE ROUNDED END OF THE LEVER ARM SLOT
_______ WITH THE ROUNDED END OF THE VANE TRUNNION. ENGINE DAMAGE WILL OCCUR IF THE VANE IS NOT CORRECTLY ALIGNED.
1) Align the rounded end of the lever arm slot with the rounded end of the vane stem. a) If the vane stem has a witness mark, the lever arm is
installed correctly when the mark is on the same side as the rounded end of the lever arm slot.
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////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
1ST-STAGE 2ND-STAGE 3RD-STAGE LEVER ARM
AA
IGV
SEE A
A
FWD
SEE C SEE B ROUNDED END OF THE SLOT
NUT LEVER ARM (EXAMPLE)
ACTUATION RING BUSHING WASHER GSM-1089335-00-B FRONT
LEVER ARM
STATOR CASE
B STATOR VANE
WITNESS MARK
VANE A-A ROUNDED END
VANE OUTER TRUNNION PULLER
C
COUNTERTORQUE
TOOL
LEVER ARM
COUNTERTORQUE TOOL INSTALLATION
PULLER INSTALLATION G-M56-MM-0037-(1)-03-B Lever Arm and Bushing on the Stator Vane Installation Figure 801 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ACTUATION
LESS THAN
RING
CORRECT NOT CORRECT
EXAMPLE OF VARIBLE STAOR VANE (VSV) AND LEVER ARM ENGAGEMENT (1ST-STAGE SHOWN)
GSM-1112369-01-C
Lever Arm and Bushing on the Stator Vane Installation Figure 801 (Sheet 2)
E04092
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEEA
2 4 1
21
1 2 FWD
11
2 HORIZONTAL FLANGE BOLTS
3 (LEFT SIDE)
NOTE: DIMENSIONS ARE IN INCHES FOLLOWED BY MILLIMETERS IN PARENTHESES.
2
_________HOLE SIZE ______TORQUE
1 CLEARANCE 0.250 (6.35) 120-130 LB-IN. (14-15 N.m) 1 2 1 4 1 2
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