32-61 Cylinder Assembly (continued)
A. Removal
1. Refer to Figure 32-5. Hinge right aft seat assembly forward. Install MT545-1 pin
assembly in D757-1 valve assembly.
2. Disconnect D674-9 hose assembly from valve fitting. Install MT546-1 diffuser on
valve fitting and special torque diffuser to 120 in.-lb. Cap hose to prevent foreign
object contamination.
3. Remove hardware securing D761-2 cover to valve and D761-1 support. Remove
cover.
4. Remove hardware securing D761-1 support to valve. Do not kink cable.
5. Cut and discard MS3367-4-9 ty-rap secured to D760-1 trigger. Disengage D676-2
cable assembly ball from trigger, but do not kink cable.
6. Remove screws securing D669-3 strap to D669-6 cradle assembly and remove strap.
Carefully remove cylinder.
B. Depressurization
CAUTION
Use appropriate eye and hearing protection. Do not service
cylinder assembly while cylinder is installed in helicopter.
1. Remove cylinder per Section 32-61 Part A. Verify MT545-1 pin assembly and
MT546-1 diffuser are properly installed.
2. Refer to Figure 32-5. Remove D760-7 cap (etched with “FILL PORT”) from valve
assembly. A loud pop may be heard when cap’s seal is broken.
3. In a well-ventilated area, slowly screw MT546-4 bleed fitting assembly into fill-port
until the noise of escaping gas is heard. Screw fitting in or out to adjust flow rate.
Finish bleeding cylinder with bleed fitting fully in. When noise ceases, verify cylinder
pressure gage indicates zero. Remove bleed fitting.
4. Install cap in valve assembly and special torque cap to 40 in.-lb.
5. Evaluate cylinder life and hydrostatic test status.
SEP 2012 R66 Maintenance Manual Chapter 32 Landing Gear Page 32.13
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