Yanmar EF393T Operator's Manual page 30

Clutch pedal
The clutch is a device for connecting and disconnecting
engine power to the transmission.
To disconnect engine power to the transmission,
depress the clutch pedal fully.
To connect the engine power, release the clutch pedal
gradually and the engine power transmits to
transmission.
IMPORTANT
Do not rest your foot on the clutch pedal while
operating. The clutch disc may wear prematurely.
Differential gear lock pedal
A differential gear system is equipped on front and rear
axles of this tractor for smooth turning.
Depressing this pedal locks rear axle differential gear
box and rear wheels rotate as if right and left axles are
connected. When one side rear wheel spins and the
other does not rotate, depress the pedal to lock the
differential gear for escaping.
To unlock differential, release the depressed pedal.
IMPORTANT
When differential gear is locked, drive tractor slow
speed and keep going straight. Never steer tractor
while depressing the pedal.
WARNING
Never fail to unlock the differential gear after escaping
from the place. Otherwise, you cannot make an
intended turn and an accident may result.
Front wheel drive lever
The lever engages or disengages front wheel drive.
Depress clutch pedal and move the lever when tractor
stops.
(A) Front wheel drive lever
(2w) OFF: Two-wheel drive
(4w) ON: Four-wheel drive
IMPORTANT
Be sure to stop the tractor whenever move the lever.
Disengage front wheel drive when drive with high gear
on a road, hard surface place or towing trailer. The
front tire may wear prematurely or front axle gears may
break in case of heavy braking.
(A) Clutch pedal
(A) Differential gear lock pedal
(R) Release lock (release pedal)
(L) Lock differential gear
(keep depressing pedal)
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EF393T OM