Hitachi ZW180, Technical Manual

Page: 356 / 374

COMPONENT OPERATION / Axle
T3-10-8
LIMITED SLIP DIFFERENTIAL (LSD)
(OPTIONAL)
The wheel loader must be operated on slippery ground
condition like sand and muddy soil. In places like
these, the tires can slip although the torque propor-
tioning differential (TPD) is installed. As rotation is
transmitted to the slipping tire and not to the tires con-
tacting the road, not only the funtion of the wheel
loader is worsened but the tire lives are shortened.
In order to avoid this, the limited slip differential (LSD)
provided with the differential movement restriction de-
vice in order to avoid different movement of the left
and right wheels is adopted. Driving force transmitted
to the left and right tires further changes.
Operational Principle
LSD is so constructed that the clutch disc is inserted
between the pressure ring supporting the spider with
the cam and the case, which makes restriction of
different movement by keeping the tire speeds the
same by the resistances of the friction surfaces. The
variation of the driving force transmitted to the left
and right tires is made larger than TPD.
T4GB-03-10-003
Ring Gear
Pressure Ring
Side Gear
Pressure Plate
Clutch Disc
Case
Pinion Gear
Spider