Robinson Helicopter Company RTR 660, Maintenance Manual

Page: 350 / 542

62-11 Blade Boots
Refer to R66 Illustrated Parts Catalog (IPC) Figure 62-1.
A. Removal
1. Remove main rotor blades per Section 62-10.
2. Place a suitable drain container below main rotor blade spindle assembly. Remove
two B289-2 bolts and drain fluid.
3. Remove outer boot clamp and hold boot back to expose inner boot clamp. Remove
inner clamp and peel boot from spindle. Boot inner portion may be sealed to spindle
with B270-1 sealant.
4. As required, use a plastic scraper and vacuum cleaner to remove old B270-1 sealant
from spindle area to be covered by boot inner lip. Avoid contaminating spindle
bearings with old sealant.
WARNING
Use only plastic scrapers to remove old sealant; chemical
removal is prohibited.
B. Installation
1. Visually inspect and verify boot is undamaged. Carefully stretch new boot over
spindle.
2. If blade will be subjected to sub-freezing temperatures, sealing of boot’s inner lip
to spindle is recommended: Pull boot inner lip back enough to expose junction of
C147-1 spacer and C158-1 spindle. Solvent clean and dry boot inner lip, spacer,
and spindle surfaces clamped by boot inner lip. Apply an approximately 1/16-inch
diameter bead of B270-1 sealant completely around spacer-spindle junction. While
sealant is still wet, properly position boot inner lip; install C165-1 clamp assembly
and special torque per Section 20-33. Rotate spindle and verify adequate clearance
between clamp assembly and pitch horn. Wipe off excess sealant and allow to cure
in accordance with sealant manufacturer recommendations.
NOTE
When installing inner clamp, ensure that shoulder of boot inner
lip is not wedged beneath clamp or clamp may loosen in service.
Inspect boot interior and verify no cuts or punctures.
WARNING
Use only B270-1 sealant; silicon sealant is prohibited.
3. Stretch boot outer lip over pitch horn flange. Rotate spindle and align pitch horn
arm bolt hole with spindle bolt hole. Install clamp assembly and standard torque per
Section 20-32.
4. Fill pitch bearing housing per Section 12-51.
Page 62.6
Chapter 62 Main Rotor R66 Maintenance Manual 25 OCT 2010