Specifications

Power Train Systems Operation 36

Axle power flow

Power is transmitted by the transmission output shaft

to the pinion (4) which meshes with and drives the

crownwheel (5), which is mounted to the differential.

The differential is part of the drive axle. It is a single

reduction unit with a differential drive gear fastened on

the differential case.

The differential is used to send the power from the

transmission to the wheels. When one wheel turns

slower than the other, the differential lets the inside

wheel stop or turn slower in relation to the outside

wheel.

Differential case (5A) has four differential pinion gears

(5B) on the differential pinion shaft. The pinion gears

are engaged with two side gears (5C). The side gears

are splined to the axle shafts.

When the lift truck moves in a forward direction and

there is the same traction under each wheel, torgue in

each axle and pinion gears (5B) are balanced. Both

left and right axles roatate the same. During a turn, the

force(traction) that is on the drive wheels is different.

These different forces are also felt on opposite sides

of the differential and cause pinion gears (5) to turn.

The rotation of pinion gears (5) stops or slows the

inside wheel and lets the outside wheel go faster. This

moves the machine through a turn under full power.

The differential gets lubrication from oil thrown about

inside the housing.