Kenworth T410, Driver'S Handbook Manual

Page: 209 / 418

CAT: 8612 November 2019 Page 183
OPERATING INSTRUCTIONS
The Meritor main differential lock or Dana wheel differential lock is controlled
by the switch labelled INTER AXLE DIFF LOCK. By moving the switch,
you can LOCK or UNLOCK the main differential when the vehicle is moving
or stopped.
If your vehicle has an automatic transmission, it may be necessary to shift
the transmission momentarily to the neutral position to allow the main
differential lock splines to fully engage or disengage.
To UNLOCK the inter-axle differential
1. When you reach normal road surfaces or better road conditions
where the differential lock is not needed, switch the differential lock
to UNLOCK.
2. Let up momentarily on the accelerator pedal to relieve torque and
allow the clutch to disengage.
3. When you unlock the differential, normal vehicle handling will
resume and the light on the warning cluster will turn off.
TRIDEM DRIVE AXLES
Vehicles with Tridem drive axles with interaxle differential locks installed,
operate as follows;
Meritor RZ78 - The forward rear axle is permanently locked mechanically,
the centre axle is driver controlled.
Dana T78 - The forward rear axle is locked permanently by air, the centre
is driver controlled.