SECTION 33 -- BRAKES -- CHAPTER 1 7
603.54.471.00 -- 11 -- 2004
DESCRIPTION & OPERATION
The mechanically operated service brake system
acts on the rear wheels.
The parking brake basically acts on the service
brakes. An entirely independent parking brake can
be fitted that acts, via a mechanical clamp, on the
discs splined onto a shaft integral with the bevel pin-
ion.
The hydraulically controlled front brake circuit is
shunted, via two hydraulic pumps fitted on the brake
links (one on each side), to that of the rear brakes and
acts via clamps on the self--ventilated disc (for mod-
els with three--cylinder engine) or via a ring piston on
the brake discs fitted inside the front axle (for models
with a four--cylinder engine).
Application of the front brakes takes place at the
same as the rear brakes when both brake pedals
(latched for road travel) are depressed thanks to a
hydraulic device (logic valve). this rear--mounted de-
vice excludes the front live axle drive shaft brakes
when only one brake pedal is depressed.
SERVICE BRAKES
Refer to the illustrations on page 4. The service
brakes are mechanic with oil bath discs. When the
left--hand brake pedal (fig. a ) is depressed, the links
move as indicated by the arrows, this causing actua-
tor discs to turn, ball (3) in the tapered seats to force
the discs apart as shown in detail (c).
As a result, two simultaneous actions compress the
brake discs against the differential support (8) and
the back up discs, immediately upon releasing the
pedal spring (7), pull the actuator (4) back into the
rest position (figure b and detail d) and as a result the
discs are released. The action is similar when the
right--hand brake pedal is pressed (Rd).
PARKING BRAKE
Refer to the drawing on page 3 as shown in detail
(c). The parking brake is controlled mechanically.
It operates on the rear bevel pinion shaft by means
of an idler gear and is controlled by a lever located on
the LH side of the operator.
When the parking brake control lever is applied, the
flexible rod acts on the external support lever and
brings the braking sectors up against the three brake
discs splined onto the idler gear, hence stopping the
tractor.
To Next Page
Loading...
