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tern
in order to
be
acceptable.
Characteristic differences
between
the three types of gear
sets as
well
as differences
between individual
gear sets of the same type
will re-
sult in patterns that
are acceptable
yet dift'erent from those
shown in
Fig.
5
HUNTING
GEAR SET
In a hunting-type gear
set, any
one pinion gear tooth comes
into
contact with all drive
gear teeth.
In this type, several revolutions
of
the ring gear are required
to make
all possible gear combinations.
FIG.8 -Unacceptable
Non-Hunting Pattern-
Centre-Heel-Centre
ACCEPTABLE
PATTERN
FIG. 9 -Acceptable Non-
Hunting Gear Set-Coast
Pattern
PART
4-1-REAR AXLES
DRIVE SIDE
;
BACKLASH CORRECT
I
.004 THINNER SHIM
REQUIRED
BACKLASH CORRECT'
.004 THICKER SHIM
REQUIRED
SHIM CORRECT
DECREASE
BACKLASH
.004
SHIM CORRECT
INCREASE BACKLASH
.004
4-7
COAST SIDE
FIG. 11-Typical Gear Tooth Contact Patterns Indicating
Shim or Backlash Change
tooth, the pattern
is
a result of the
combined tooth contacts. Therefore,
the pattern
is
uniform from
tooth
to tooth.
FIG. 1 0-Acceptable Non-
Hunting Pattern-Uniform
FIG. 12-Pinion
&
Ring
Gear Tooth Contact
Adiustment
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