TANK AS-FUEL 1844719 - Caterpillar

To prevent damage to the differential, do not engage the differential lock at high speeds.In areas of high resistance, it may be necessary to turn the machine slightly in order to aid in unlocking the differential lock. Decreasing the engine rpm may also be helpful.
During operation on a soft area of ground, wheel slippage can occur. The machine may slow considerably, or the machine may stop completely. The differential cannot transfer more torque than that going to the spinning wheel even though the opposite wheel may be on firm ground. With the differential lock, improved traction is possible because the differential lock enables the wheel on firm ground to obtain more torque than the spinning wheel. The machine is able to pull through a soft area of ground because the additional torque can be transferred into tractive effort.The differential for the axle has an arrangement which allows the differential to be locked and the mechanism enables the axle shafts to be locked together. Both wheels then rotate at the same speed regardless of different ground resistance between the wheels.
Illustration 1 g01202933
(1) differential lock switchThe differential lock is controlled by a foot switch (1) that is located on the floor of the operator station.The differential lock is controlled in the following way:
The differential lock is engaged by oil pressure when the foot switch is activated.
The differential lock is disengaged automatically when the torque equalizes between the wheels.
Illustration 2 g01424347
Solenoid valve for Autoshift (A) Solenoid valveThe foot switch for the differential lock control operates a solenoid valve (A). Oil is supplied to the solenoid valve from the charge pump for the transmission.
Illustration 3 g01424359
Differential lock actuator (2) Fork (3) Spring (4) Piston (5) Shaft (6) SpringFork (2) is located on shaft (5) in the differential housing. When the switch on the floor of the operator compartment is pressed oil pressure is supplied to the solenoid valve. Oil pressure from the solenoid valve (A) exerts pressure on piston (4). The piston moves the shaft (5) and the fork (2) against springs (3) and (6).
Illustration 4 g01424410
Differential lock (2) Fork (7) Collar (8) Slots (9) Side gearFork (2) moves collar (7) axially across the differential. Four pins that are located in the collar engage in slots (8) in side gear (9) of the differential in order to engage the differential lock.In normal operation, the differential is unlocked and the axle shafts are free to rotate at different speeds. The wheel speed is governed by the resistance at the wheel.Fork (2) and collar (7) are held clear of the differential by springs (3) and (6) when the differential is unlocked.