53-32 Hydraulic Servo Support Frame
Refer to R66 Illustrated Parts Catalog (IPC) Figure 67-19.
A. Removal
1. Remove main rotor gearbox per Section 63-20.
2. Remove main rotor hub per Section 62-20.
3. Remove mast fairing per Section 53-22.
4. Remove swashplate assembly per Section 67-40.
5. Refer to Figure 53-3. Tag F121-3 push-pull tube assemblies with corresponding
D212 servo assembly, and tag servos with location on G201-1 servo support frame.
Remove hardware securing push-pull tubes to servos.
6. Remove hardware securing F339-1 jackshaft weldment to frame.
7. Remove hardware securing servos to frame forward plates and aft bracket. Support
forward servos, and aft servo and jackshaft, during hardware removal.
8. Remove gearbox mounting bolts, mounts, and hardware. Lift frame off of gearbox,
over mast assembly.
B. Installation
1. Refer to Figure 53-3. Lower G201-1 servo support frame over mast assembly, onto
main rotor gearbox. Install gearbox mounting bolts, mounts, and hardware. Install
nuts finger tight.
2. Remove tags and install hardware securing D212 servo assemblies to frame forward
plates and aft bracket. Standard torque bolts per Section 20-32, and torque stripe
per Figure 5-1.
3. Install hardware securing F339-1 jackshaft weldment to frame. Standard torque
bolts per Section 20-32, and torque stripe per Figure 5-1.
4. Install F121-3 push-pull tube assemblies as removed. Standard torque bolts per
Section 20-32, and torque stripe per Figure 5-1.
5. Install swashplate assembly per Section 67-40.
6. Install mast fairing per Section 53-22.
7. Install main rotor hub per Section 62-20.
8. Install main rotor gearbox per Section 63-20.
25 OCT 2010 R66 Maintenance Manual Chapter 53 Fuselage Page 53.9
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