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| Illustration 1 | g03342605 |
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End View of Differential Group (1) Differential lock cylinder (2) Ring gear (3) Differential housing | |
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| Illustration 2 | g02566156 |
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Differential Group (1) Differential lock cylinder (2) Ring gear (3) Differential housing (4) Differential pinion (5) Spider (6) Piston (7) Side gear (8) Clutch jaw that is splined to the axle (9) Roller bearing (10) Clutch jaw that is splined to the differential housing (11) Thrust washers (12) Bearing (13) Side gear (14) Pinions (15) Thrust washers (16) Bearings (17) Stop | |
The differential sends the same amount of torque to each wheel. The differential will allow the inside wheel to have a slower rotation in relation to the outside wheel. Also, the differential will allow the inside wheel to stop in relation to the outside wheel. The differential still sends the same amount of torque to each wheel.
The output shaft of the transmission is fastened to differential pinion (4) with splines. The differential pinion turns ring gear (2) of the differential. This ring gear is fastened to differential housing (3). The differential and bevel gear case is divided into two sections. The differential and bevel gear has four pinions (14) on spider (5) and two side gears (7) and (13). The four pinions engage at 90 degree angles with the two side gears. The side gears are fastened to the inner end of the axles.
When the machine is moving in a straight direction, the same amount of torque on each axle holds the pinions so the pinions will not turn on the spider. This gives the same effect as if both of the wheels are driven by the same shaft. When the force that is sent to the wheels is different, the forces are sent to the opposite sides of the differential. This action will turn the pinions. The rotation of the pinions allows the inside wheel to have a slower rotation in relation to the outside wheel. Also, the rotation of the pinions allows the inside wheel to stop in relation to the outside wheel. This moves the machine through the turn under full power.
The hubs of the differential housing are on tapered roller bearings (9) and (12). Adjustments can be made to the bearings. The pinions also turn on bearings (16). The side gears turn against thrust washers (11) which take the end thrust against the differential housing.
Oil is thrown around the inside of the differential for lubrication of the inside components. The flat surfaces on the spider allow the oil to go to bearings (16) for the pinions and thrust washers (15).
The location of stop (17) is in the differential and bevel gear case. The stop prevents any side movement of the bearing cap when the machine is in operation.
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Personal injury or death can result from limited steering control. Engaging the differential lock when the machine is moving can limit steering control. Do not engage differential lock when machine is moving at high speed because steering control will be limited. |
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| Illustration 3 | g03428061 |
| (18) Differential lock control | |
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| Illustration 4 | g06248737 |
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(1) Differential lock cylinder
(18) Differential lock control (19) Transmission ECM (20) DL port (21) Differential lock solenoid (22) DLT port | |
When one drive wheel has poor traction, the other wheel turns freely. This action causes a loss of power which is remedied by the differential lock. This is done by sending power to both wheels through a jaw clutch. The jaw clutch allows the differential to engage while the machine is using full power at any speed. Also, the jaw clutch allows the differential to release while the machine is using full power at any speed. The jaw clutch can be engaged at any speed before the wheels start to turn freely.
| NOTICE |
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Do not engage the differential lock with one wheel spinning. Reduce engine rpm, until the wheel stops spinning, before depressing the differential lock pedal. |
The operator must keep differential lock control (18) depressed to keep the jaw clutches engaged. When the differential lock is engaged, both wheels rotate at the same speed. The condition of the surface has no effect on the turning speed of the wheels. Power is divided and the same amount is sent to each wheel. Loss of power is prevented by not allowing one wheel to turn freely. Releasing the switch releases the differential lock.
When differential lock control (18) is pushed down, the transmission electronic control module (19) sends a signal to the differential lock solenoid (21), which is located in the fan and brake manifold. The solenoid opens an oil passage for oil to act on the differential lock cylinder (1) in the differential housing. This action allows oil to flow through the differential lock cylinder (1). The oil leaves the fan and brake manifold through the "DL" port (20). The oil pressure pushes piston (6) to the inside. The piston pushes jaw (8) to the inside. Splines connect jaw (8) to the axle shaft. Jaw (8) engages jaw (10). Splines connect jaw (10) to the differential housing. The pinions cannot move in relation to the differential housing. This gives the same effect as one solid axle drive.
When the differential lock control (18) is released, the oil pressure to the differential lock cylinder (1) is stopped. The force of the springs pushes piston (6) to the outside. Jaw (8) moves to the outside and jaw (8) is not engaged with jaw (10). The springs keep the jaws from being engaged, until oil pressure is sent to the cylinder. When the differential lock is not engaged, the operation of the differential is normal.