NMC-WOLLARD MB-4 200-DF, Operation, Maintenance And Parts Manual

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1.3.16 Drive/Steering Axles
Planetary axles, double reduction,
heavy-duty bearing mounted differential as-
sembly. Second reduction planetary gears
set in wheel hubs multiply torque and re-
duce drive line stress. Rear axle center
pivot mounting allows tractor to negotiate
obstructions-axle has 4” oscillation. Front
axle solid mounted to tractor frame.
1.3.17 Brake System
Power assisted four wheel service brakes,
hydraulic wet disc type. Dual brake system
serves front and rear tires independently.
Emergency back-up provided should en-
gine fail.
1.3.17.1 Service Brake
The brake pedal is located on the floor, to
the right of the steering column. The service
brakes, both front and rear, are “wet” disk
type, fully enclosed and oil cooled. They will
withstand repetitive use without excessive
fading, provide short stopping distances,
and are spark free.
Do not use the service
brake as a park brake. Leakage could
cause the service brake to release.
1.3.17.2 Parking Brake for Tractor
w/Hydraulic Brakes
The parking brake (hand brake) is on the
operator’s right. When pulled, the lever
pulls a cable which pulls the brake shoes
together against the parking brake drum.
The parking brake is attached to the trans-
mission output shaft and is completely me-
chanical.
1.3.17.3 Parking Brake for Tractor w/Air
Brakes
The parking brake is to the right of the con-
trol panel. It is yellow and reads System
Park. When pulled the air is released from
the parking brake chamber and the springs
force the brake shoes together against the
parking brake disk. Pull to apply, push to re-
lease. The parking brake is attached to the
transmission.
1.3.17.4 Parking Brake Shutdown
An indicator light on the dash will come on
when the parking brake is applied. See
figure1-1 or 1-2. Release the parking brake
before shifting from neutral. If the shift
selector is moved from neutral while the
parking brake is applied, the engine will
shut down.
1.3.18 Steering System
Full Power hydraulic driver select 4-wheel
coordinated, 4-wheel crab, or front 2-wheel
steer. Emergency back-up provided should
engine fail.
IMPORTANT! Before switching steering
modes, turn the steering wheel to align both
axles straight ahead. Do this to maintain
synchronization of the axles, i.e., do not
lock the rear axle in a skewed position.
M200 MB4 Tow Tractor Manual No. 42975
PAGE 1-7
JULY 31, 2004