MTD 31A-2M1A729 Operator's Manual page 11

ChuteAssembly
Rotate the discharge chute to the left or right using the chute
handle. The pitch of the discharge chute controls the angle at
which the snow is thrown. Loosen the wing knob on the side of
the discharge chute before pivoting the discharge chute upward
or downward. Retighten the knob once the desired position has
been achieved.
ShavePlate
The shave plate maintains contact with the pavement as
the snow thrower is propelled, allowing snow close to the
pavement's surface to be discharged.
SECTION 4 -- CONTROLS AND FEATURES
11