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Spicer Tandem Drive Axles Pro-40 Single Reduction and Single Reduction with Differential Lock User Manual

Page 90

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Theory of Operation

With Lockout Engaged
(Inter-Axle Differential is Not Operating)

Lockout should only be engaged when both axles are rotat-
ing at the same speed. Operation should be limited to low-
traction situations and should be disengaged when normal
traction returns. Failure to do so will result in poor handling
and damage to the axle components.

Note: Varied road surface conditions can result in unequal

torque distribution between the two axle assemblies.

Prolonged operation with the lockout engaged can dam-
age axle and driveline components.

CAUTION

CAUTION

1 - Input torque
2 - Lockout engaged
3 - Forward axle torque is transmitted from the helical side
gear through the pinion helical gear, drive pinion, ring gear,
wheel differential and axle shafts.

4 - Rear axle torque is transmitted from the output shaft side
gear through the output shaft, inter-axle driveline, drive
pinion, ring gear, wheel differential and axle shafts.
5 - Input torque (power flow) from the vehicle driveline is
transmitted directly to the helical side gear and the output
shaft. A positive drive is provided to both axles for
maximum traction under adverse road conditions.

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