Spicer Tandem Drive Axle Dual Range & Double Planetary 34,000-45,000 lbs - Manual (Page 7)

Torque Distribution in High Range (cent’d)
A lockout mechanism is incorporated in the power
divider to enable the vehicle driver to lock out the
INPUT
inter-axle differential and provide maximum traction TORQUE
under adverse road conditions.
In operation, an air cylinder (controlled by a cab-
mounted valve) shifts a sliding clutch. To lock out
inter-axle differential action, the clutch engages the
helical-side gear and causes this gear, the input shaft
and differential to rotate as one assembly. This action
provides a positive drive to both axles.
With lockout engaged, torque is distributed to both axles
without differential action. The forward axle
pinion and ring gear are driven by the helical-side
gear. The rear axle gearing is driven from the output
shaft side gear and inter-axle driveline.
NOTE:
Varied road surface conditions can result
in unequal torque distribution between the two axle
assemblies. -
Torque is transmitted to both axles without inter-axle
differential action.
Torque Distribution in Low Range
INPUT
TORQUE
INPUT
TORQUE
Torque is transmitted to both axles without inter-axle Torque is transmitted to both axles through inter-axle
differential action. differential action.
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