TM 5-3820-239-15
Section XIX. PROPELLING CONTROLS
fittings.
the flow of air to the propelling air motors
for each track. Each control consists of a three-
ling controls.
position valve, which can be moved either
forward or back, to direct the flow of air one
way or the other, causing the propelling air
motor to move the track forward or reverse
controls.
center (off) position, and each valve can be
fittings.
operated independently of the other.