65-30 (Tail Rotor Driveline) Intermediate Flex Plate Shimming (continued)
5. Using the smaller average gap from step 3a or 3b, subtract the flex plate average
thickness determined in step 2:
Smaller average gap between flange arms (step 3a or 3b) inch
Subtract flex plate average thickness (step 2) − inch
Total = inch
6. Select shims per Table 65-1 and install intermediate C947-3 flex plate assembly.
Standard torque nuts and palnuts per § 20-32 and torque stripe per Figure 5-1. Remove
F196-1 (tail rotor) fan shaft temporary support.
WARNING
Shim both arms of flanges equally. All fasteners must meet
torque requirements given in § 20-33.
Calculated
Dimension
Shim required between
intermediate C947-3 flex plate
and F196-1 fan shaft aft flange
Shim required between
intermediate C947-3 flex plate
and D224 tail rotor drive shaft
forward yoke
−0.017 or greater
negative number
NAS1149F0432P washer between forward C947-3 flex plate
assembly and F908-1 yoke assembly and/or F196-1 fan shaft
forward flange may be relocated under nut as required to achieve
−0.016 / +0.016 inch calculated dimension. Relocate washers
as required, and repeat steps 3 thru 6.
−0.016 / +0.016 in. None None
+0.017 / +0.047 in. NAS1149F0432P washer None
+0.048 / +0.079 in. NAS1149F0432P washer NAS1149F0432P washer
+0.080 / +0.110 in. NAS1149F0463P washer NAS1149F0432P washer
+0.111 / +0.141 in. NAS1149F0463P washer NAS1149F0463P washer
+0.142 or greater
positive number
NAS1149F0432P washer between forward C947-3 flex plate
assembly and F908-1 yoke assembly and/or F196-1 fan shaft
forward flange may be exchanged with NAS1149F0463P washer
as required to achieve −0.016 / +0.016 inch calculated dimension.
Exchange washers as required, and repeat steps 3 thru 6.
TABLE 65-1 TAIL ROTOR DRIVELINE
7. Measure fanwheel-to-inlet gaps per § 79-11.
MAY 2015 Chapter 65 Tail Rotor Drive System Page 65.9
To Next Page
Loading...