Limited-Slip, Self-Locking Differential Lock Operation; Front Axle Differential With Limited-Slip Unit Overhaul - New Holland TD60D Repair Manual

SECTION 25 - - FRONT AXLE MECHANICAL TRANSMISSION - - CHAPTER 1
LIMITED- -SLIP, SELF- -LOCKING DIFFEREN-
TIAL LOCK
Operation
The differential with Iimited slip Iocking (LlM--
SLlP) is of the two planet gear--type. It is provided
with two multi--disc clutch assemblies fitted be-
tween the side gears and the differential casing.
This differential Iock device is totally automatic. It
requires no manual operation and significantly
reduces (but does not completely eliminate) wheel
slip.
The difference in speed between the side gears
and the differential casing when a wheel loses grip
and begins to slip, is prevented by the clutch
assemblies that are compressed by axial thrust
from the bevel drive torque transmitted to the side
gears by means of the teeth on the two planet
gears.
These torque values may be different, according
to the nature of the ground and the route followed
by the tractor. Torque may vary in intensity,
thereby proportionally varying the axial thrust on
the clutches. This causes the side gears to mesh
with the differential casing which, in turn, permits
the axle to overcome the unevenness of the
ground.
FRONT AXLE DIFFERENTIAL WITH LlMITED- -
SLlP UNIT
Overhaul (Op. 25 102 27 )
WARNING
Handle all parts with carefully.Do not put your hands
or fingers between parts. Wear suitable safety
clothing, safety goggles, gloves and footwear.
1. Remove the bevel drive--differential casing
assembly from the front axle and attach to the
support 380000255 (4). Lock the support in a vice
and proceed with disassembly, as follows.
2. Remove the bolts (2) and the left-- and
right--hand ring nut Iock plates (3).
3. Check that the right and Ieft--hand caps (1) are
clearly marked, so as not to mix the parts during
reassembly.
4. Remove the left-- and right--hand bearing
adjustment ring nuts (Gd) from the crown wheel.
5. Remove the bolts (C
and separate the crown wheel from the bevel
pinion support.
6. If necessary, unscrew the retaining bolts (C3,
page 4) and remove the crown wheel.
), securing the caps (1)
9
LIMITED- -SLIP self- -locking differential lock
37
78
79
603.54.471.00 - - 11 - - 2004