Clutches, Rear Axles, and Steering completed the shift into the low range. Some ve- hicle motion is needed to ensure engagement of the axle. The main differential lock provides maximum traction under slippery conditions. When the differential lock is engaged, the clutch collar completely locks the differen- tial case, gearing, and axle shafts together, maximizing traction of both wheels and protecting against spinout. Under normal traction conditions, do not engage the differential lock. Meritor Drive Axles with Main Differential Lock The Meritor main differential lock is a driver-controlled traction device operated from the vehicle cab. See Fig. 6.2 .
A rocker switch allows the driver to lock or un- lock the differential. An indicator light in the switch comes on when the differential lock is engaged. Operate the axle with differential action between both wheels. Meritor Main Differential Lock Operation To lock the main differential and obtain maximum trac- tion under slippery conditions, depress the control switch. WARNING Lock the main differential only when the vehicle is standing still or moving less than 25 mph (40 km/h). Never lock the main differential when the vehicle is traveling down steep grades or when the wheels are slipping.
This could damage the differential or lead to loss of vehicle control, causing personal injury and property damage. f601427a 10/02/98 If the vehicle is moving, maintain a constant vehicle speed while engaging the differential lock. Briefly let up Fig. 6.2, Differential Lock Switch 6.4