TM 5-3895-367-14&P
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-10. AGITATOR.
With the clutch engaged and the spreader and towing
vehicle moving, the agitator (1) rotates at the same
speed and in the same direction as the towing vehicle is
moving. Right-hand and left-hand vanes (2) welded to
the agitator evenly distribute the aggregate to the feed
roll (3). The agitator Is directly driven by the right-hand
traction drive wheels (4) by a chain (5) and two
sprockets. A control handle on the right side of the
hopper engages and disengages the clutch (6) that
drives the agitator.
1-11. FEED ROLL.
With the clutch engaged and the spreader and towing
vehicle moving, the feed roll (3) rotates at the same
speed as the towing vehicle Is moving. The feed roll is
driven by the gearbox (7) by a chain (8) and two
sprockets. Grooves in the feed roll catch the aggregate
and distribute it on the road bed.
1-12. GEARBOX.
The gears in the gearbox (7) are directly driven by the
left-hand traction drive wheels (9) by a coupling and
shaft. Gears inside the gearbox ensure that the feed roll
(3) always rotates in the same direction, whether the
spreader is traveling forward or backward. A slip clutch
inside the gearbox automatically disengages the feed roll
if the feed roll control lever (10) is set for the wrong
direction.
1-13. TRACTION DRIVE.
The traction drive wheels (4 and 9) roll along the road
bed and provide the mechanical motion that drives the
agitator (1) and feed roll (3). A coupling and shaft on the
left set of traction drive wheels drive the gearbox (7),
which in turn drives the feed roll through a chain (8) and
two sprockets. A clutch on the right set of traction drive
wheels drives the agitator through a chain (5) and two
sprockets.
1-14. COUPLER HITCH AND TRUCK HITCH.
The truck hitch is mounted on the back of the dump
truck. The coupler hitch (11) is mounted on the front of
the spreader. A crank (12) raises and lowers the coupler
hitch by opening and closing a set of pantograph links,
allowing the spreader to be used with a variety of dump
trucks of differing heights. Dogs (13) Inside the coupler
hitch housing latch onto the truck hitch. A spring-loaded
latch lever (14) opens the dogs inside the coupler hitch
housing, allowing the spreader to be coupled and
uncoupled.
1-6
