TM 9-2320-260-34-1
3-5. VIBRATION DAMPER MAINTENANCE
THIS TASK COVERS:
a. Check Runout and Wobble
c. Inspection
b. Removal
d. Installation
INITIAL SETUP
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-260-10
TM 9-2320-260-20
SPECIAL TOOLS
TM 9-2320-260-34P-1
Engine barring tool (Appendix B, Item 66)
EQUIPMENT CONDITION
TOOLS
Fuel valve in off position (TM 9-2320-260-10).
General mechanic's tool kit
Fan blade removed (TM 9-2320-260-20).
(Appendix B, Item 1)
Battery ground cables disconnected
Torque wrench, 3/8-in. dr.
(TM 9-2320-260-20).
(Appendix B, Item 4)
GENERAL SAFETY INSTRUCTIONS
Dial indicator (Appendix B, Item 11)
Soft-head hammer (Appendix B, Item 47)
Make sure fuel shutoff valve and ignition switch are
OFF before cranking engine.
MATERIALS/PARTS
Six lockwashers (Appendix D, Item 223)
WARNING
Ensure fuel shutoff valve and ignition switch are OFF before
cranking engine. Failure to do so may result in injury to personnel.
1. Check vibration damper (2) for runout:
a. Position dial indicator with holding fixture on engine (1).
b. Position dial indicator plunger on edge of flange (3) and zero dial indicator.
c.
Using engine barring tool, rotate vibration damper (2) and take reading. Replace vibration
damper (2) if reading exceeds 0.025 in. (0.64 mm).
