CEMB USA DWA 1000XLB - Manual (Page 40)

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Check with a rule and if necessary adjust the distance between the wheels and the chassis so that it is 1.
the same for the right and left wheels
Press 2. or wait a few seconds for the Rear Adjustment page to appear
Even if the distance between the wheels and the chassis is not adjusted, the wheels will be aligned with
each other at the end of the alignment procedure. Nonetheless, if the distances between the wheels and
the chassis differ greatly for the reference axle, at the end of the procedure the wheels might not be alig-
ned with respect to the chassis and the truck will thus move in "dog step" with the consequent aerodynamic
problem.
It is advisable to adjust the distance between the wheels and the chassis at least for the rear
reference axle.
The Rear Adjustment page is similar to that described in paragraph 9.2.
9.4 - (truck) Adjusting a rear axle
Before the Rear Adjustment page, the Chassis Distance page appears to remind you to adjust the axle with
respect to the chassis.
The meaning of the value displayed in the box depends on the axle being adjusted
Reference axle: Thrust angle (angle between the axle direction and the truck symmetry) •
Other rear non-steering axles: Scrub angle (angle between the axle direction and the thrust line). •
Rear steering axles: Disabled •