6. The smh estimate of brush life can be used if the machine is to work at the same rate (duty cycle), the battery is not discharged too much or the battery cells have not become damaged. If the machine is made to work harder, the battery is discharged too much, or the battery cells become damaged, the motor temperature will get hot very fast. This will cause rapid wear of the brush. Bevel gears and pinions are available in sets that are machined for each other and must never be installed separately. The same identification mark of letters and numbers is put on both the pinion and bevel gear. Make sure they have the same identification mark before going to the procedures that follow.
The distance from the centerline of bevel gear (1) to the flat end of pinion (2) is 78.0 mm (3.071 in.). The end of each pinion has a mark of either a plus (+) number, a minus (-) number, or zero (0). These numbers indicate the position where each gear set runs best. The dimension is controlled by shim pack (3) behind inner bearing cup (4). 7. It is important to check brush length and brush condition at a specific time, such as during the preventive maintenance check. If an inspection shows that brush life will not extend to the next preventive maintenance check, install new brushes. If a pinion has a mark of (+.10), it needs 0.10 mm (0.004 in.) less shims than a pinion with a mark of (0).
This increases the distance from the centerline of the bevel gear to the end of the pinion to 78.1 mm (3.075 in.). This increase of 0.10 mm (0.004 in.) is the meaning of a (+.10) mark on the pinion. If the pinion has a mark of (-.10), it needs 0.10 mm (0.004 in.) more shims than a pinion with a (0) mark. This reduces the dimension from the centerline of the bevel gear to the end of the pinion to 77.9 mm (3.067 in.). Power Transfer Group Adjustments Power Transfer Group ID MARKS 1 2 4 3 Power Transfer Group (1) Bevel gear. (2) Pinion gear. (3) Shim pack. (4) Bearing cup. Power Train Testing And Adjusting 21