User Manual

General
The brake system furnished on the handler includes a
service brake and parking brake handler.
Because service braking and “inching” (slow travel)
functions overlap, some features of inching will be
discussed here. Refer to Drive Train Section for
additional information on inching travel.
Inching Travel
Overlap between service braking and inching occurs
because the same foot pedal controls both functions,
and also because both functions control travel speed.
However, the methods of controlling travel speed are
quite different: service braking involves a controlled
stopping force applied to the front wheels while
inching involves a controlled driving force applied to
the rear wheels.
The service brake/inching pedal has three separate
functions:
BRAKE SYSTEM
Service Brakes
The service brake is applied to the front wheels of the
handler.
Oil for the brakes comes from the pilot circuit pump,
thru an accumulator charging valve and the accumu-
lator. When the service brake/inching pedal is
depressed far enough to actual the brake valve, the
hydraulic oil flows to the wet disc brakes in both
front wheel hubs. The pressure compresses the brake
discs.d16
1.It disconnects front drive axle from transmission.
2.It controls hydraulic flow to rear axle drive motors
(hydraulic flow regulates speed).
3. It applies service brake.
As illustrated, the three functions occur in sequence
as service brake/inching pedal is depressed from top
to bottom of stroke.
Practice inching/braking in a sage, open
area until you are thoroughly familiar with
response of machine to pedal travel.
15
Parking Brakes
The spring-applied/hydraulic-release parking
brakes are applied by a caliper acting on a disc
mounted on differential input flange.
NOTE: On early units having a Soma front drive axle,
the parking service brake was included in front axle brake
hubs.
TO APPLY THE PARKING BRAKE, raise the
parking brake knob located to the left of the
operator’s seat. This opens the parking brake circuit
to dump, allowing springs to close caliper on disc,
applying the brakes.
TO RELEASE THE PARKING BRAKE, push down
on the parking brake knob.
When the handler is not being used, with the engine
shut off, the parking brakes must be applied.