2
Electric Shift System
General Information
Mechanical Operation
Low to High Range or High to Low Range
When shifting axle range either up or down, motor starts and
turns worm gear shaft. The gear assembly (which is meshed
with worm gear) turns and moves eccentric pin in slot area of
slider block.
Since driving torque holds shift fork and swivel block of the
slider block assembly in place, linear motion of slider block is
translated into compression of the internal spring.
As motor shuts off at 180º of gear rotation, a break in torque
by driver allows spring force (stored in the slider block
assembly) to move the swivel pin and shift fork in appropriate
direction for axle range change.
When opposite axle range is selected by driver, the process is
repeated by motor turning another 180º in same direction. In
this case though, eccentric pin movement creates block
spring compression in the opposite direction.
Note:
The new improved housing cover does not require a
gasket (see page 17).
ELECTRIC
S
HIFT UNIT
Ho
us
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g Cove
r
Cove
r
Ga
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Ci
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embly
Red Wi
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Black Wi
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G
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ee
n
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Cam Pi
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Moto
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Cove
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Ga
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(
S
ee Note below)
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Wo
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m Gea
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Moto
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A
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embly
N
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Cable Clip
Moto
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Lead Wi
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Elect
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ic
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hift U
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it A
ss
embly
Ho
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i
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g
S
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Flat Wa
s
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(0.100", 2.54 mm thick)
S
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S
eal &
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p
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Dowel Pi
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Ba
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e Ho
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S
lide
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Block &
S
haft A
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embly
Gea
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Wa
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Gea
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Gea
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Pi
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Gea
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S
haft
