TM 5-3805-260-24DIFFERENTIAL LOCKWhen one drive wheel has bad traction, the otherwheel turns freely. This action causes a loss of powerwhich is stopped by the differential lock. This is done bysending power to both wheels through a jaw clutch. Thejaw clutch lets the differential engage or release whilemachine is using full power at any speed. The jaw clutchcan be engaged at any speed before the wheels start toturn freely.The operator must choose the time he needs toengage the jaw clutch. An example of one such need is,when one wheel starts to turn freely, or a noise is causedby the jaw clutches hitting each other, lower the enginespeed to let the jaw clutches engage.The operator must keep the pedal for the differentiallock pushed down to keep the jaw clutches engaged.When the differential lock is engaged, the speed of thewheels is the same. The condition of the surface has noeffect on the speed at which the wheels turn. Power isdivided and the same amount is sent to each wheel.This stops a loss of power by not letting one wheel turnfreely. Releasing the pedal releases the differential lock.DIFFERENTIAL LOCKWARNING: Do not turn the machinewhile the pedal for the differential lock ispushed down.When the pedal for the differential lock is pusheddown, pressure air from the control valve of differentiallock goes to air cylinder (3) of the differential lock.DIFFERENTIAL LOCK1. Springs. 2. Jaw. 3. Cylinder. 4. Jaw. 5.Piston.The pressure air pushes piston (5) to the insidecausing the jaws to engage. Jaw (2) of the clutch isfastened to the differential housing by splines. Jaw (4) isfastened to the right axle shaft. When the jaws areengaged, there is a connection between the right axleshaft and the differential housing. The differential gearsand the differential housing do not move so thisconnection causes the effect of one axle drive.When the pedal is released, the reduction in airpressure to cylinder (3) causes piston (5) to move to theoutside. The jaws are then not engaged. Springs (I)between housing and piston keep the jaws from beingengaged, until air pressure is sent to the cylinder. Whenthe differential is not engaged, the operation of thedifferential is normal.2-97D!
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