Quantcast FIGURE 3-21. Front Gear Train Backlash Measurement.

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TM 55-1905-223-24-1
FIGURE 3-21. Front Gear Train Backlash Measurement.
(2) Rotate gear clockwise. Position indicator to "0".
(3) Rotate gear counterclockwise. Verify indicator reading is between 0.003 inch (0.07 mm) and 0.020
inch (0.51 mm).
NOTE
If backlash is not within specifications, be sure the
adjacent (engaging) gear is not moving during the
measurement.
(4) If reading is not within specification, the gear must be replaced.
(5) Repeat procedure for all gears except the crankshaft gear.
d. Restore the engine to operating condition and check for normal operation.
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