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 TM 55-1905-220-14-4
3-23. TACHOMETER DRIVE - MAINTENANCE INSTRUCTIONS.
LOCATION
ITEM
ACTION
REMARKS
INSTALLATION (Cont)
ALIGNMENT
11. Tacho-
Whenever a tachometer drive cover assembly or a tach-
meter
ometer drive adaptor is installed on an engine, it is
drive
important that the cover assembly or adaptor be aligned
properly with the tachometer drive shaft.
Misalignment of a tachometer drive shaft can impose a
side load on a tachometer drive cable adaptor resulting
in possible gear seizure and damage to other related
components.
Correct alignment is established when there is no tach-
ometer drive shaft bind on the inside diameter of the
tool when one complete hand rotation of engine is made.
3-617
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