Power Train
Testing And Adjusting
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.
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.
Power Transfer Group
Adjustments
Power Transfer Group
Power Transfer Group
(1) Bevel gear. (2) Pinion gear. (3) Shim pack. (4) Bearing
cup.
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).
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.).
1
2 4 3
ID MARKS
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