20 Owner Service
MAN1249 (2/28/2018)
Blade Installation
Four Blade Installation
1. Remove any burrs on flanges generated from blades
that have slipped.
2. Start blade assembly with first blade installed next to
rotor shaft flange.
NOTE: Blade cutting edges should face the direction
of rotation.
3. Install blade inside flange pocket with blade hole
closest to end matching holes in flanges.
4. Install bolt through flange, blade, flange, and nut but
do not tighten completely.
5. Rotate blade backwards until blade profile is seated
on flange embossments in the flange pockets.
6. Tighten bolted joint to 190 Nm (140 lbs-ft).
7. Proceed by installing next blade of the same part
number in next flange.
8. Repeat steps 2-7 installing opposite hand blade in
next flange hole until all four rows of blades are
installed.
Figure 15. Four Blade Forward & Reverse Rotation Blade Installation
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