63-12 Clutch Assembly
Refer to R66 Illustrated Parts Catalog (IPC) Figure 63-1.
A. Removal
1. Remove engine shaft weldment per § 63-10.
2. Refer to Figure 63-1. Mark F906 yoke assembly and A947-2 plate assembly, to
facilitate installation. Remove plate assembly, noting hardware removed.
3. Remove bolt securing G732 cap, spacer (if installed), and F018-1 clutch assembly
to Rolls-Royce engine model 250-C300/A1. Remove clutch assembly through
main rotor gearbox compartment.
B. Installation
1. Refer to Figure 63-1. Lubricate F018-1 clutch assembly splines using A257-1, -9,
or -12.
2. Route clutch assembly through main rotor gearbox compartment, insert clutch
assembly in Rolls-Royce engine model 250-C300/A1, and install spacer (earlier
R66s), G732 cap, and bolt at rear PTO pad. Standard torque bolt per § 20-32 and
torque stripe per Figure 5-1.
3. Install A947-2 plate assembly, as removed. Standard torque fasteners per § 20-
32, and torque stripe per Figure 5-1.
4. Install engine shaft weldment per § 63-10.
MAY 2015 Chapter 63 Main Rotor Drive System Page 63.5
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