Service Manual - Dana Corporation
Service Manual - Dana Corporation
Service Manual - Dana Corporation
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
General Information<br />
Torque Distribution with Lockout Disengaged (Inter-axle Differential is Operation)<br />
Torque (power flow) from the vehicle driveline is transmitted to the input shaft and the inter-axle differential spider. At this point,<br />
the differential distributes torque equally to both axles. For the forward axle, torque is transmitted from the helical-side gear to the<br />
pinion helical gear, drive pinion, ring gear, wheel differential and axle shafts. For the rear axle, torque is transmitted from the output<br />
shaft side gear, through the output shaft, inter-axle driveline, to the drive pinion, ring gear, wheel differential and axle shafts.<br />
Torque Distribution with Lockout Engaged (inter-axle Differential is Not Operation)<br />
Input torque<br />
Lockout disengaged Drive is from differential<br />
through helical gears to<br />
forward gearing<br />
Inter-axle differential<br />
operating<br />
Drive is<br />
from differential<br />
through output<br />
shaft to<br />
rear gearing<br />
Torque is transmitted to both axles through inter-axle differential action.<br />
A lockout mechanism is incorporated in the power divider to enable the vehicle driver to lock out the inter-axle differential and<br />
provide maximum traction under adverse road conditions. In operation, an air cylinder (controlled by a cab-mounted valve) shifts<br />
a sliding clutch. To lock out inter-axle differential action, the clutch engages the helical-side gear and causes this gear, the input<br />
shaft and differential to rotate as one assembly. This action provides a positive drive to both axles. With Lockout engaged, torque<br />
is distributed to both-axles without differential action. The forward axle pinion and ring gear are driven by the helical side gear.<br />
The rear axle gearing is driven from the output shaft side gear and inter-axle driveline.<br />
Note: Varied road surface conditions can result in unequal torque distribution between the two axle assemblies.<br />
Lockout engaged<br />
Inter-axle differential<br />
not operating<br />
Input torque<br />
Drive is from<br />
output shaft side<br />
gear to rear<br />
gearing<br />
Drive is from input shaft<br />
through helical gears to<br />
forward gearing<br />
Torque is transmitted to both axles without inter-axle differential action.<br />
6<br />
<strong>Service</strong> Procedure