Check backlash between every set of gears before removal to determine which gears
6. Record backlash between each pair of gears as shown in Figure 3. Specified backlash between any pair of
gears is 0.003 to 00.007 in. (0.08 to 0.18 mm). Maximum permissible backlash between any pair of gears
before service is necessary is 0.011 in. (0.28 mm).
Figure 3. Measuring Gear Train Backlash.