Tar River Econo-Wrap EW-450A Operator's Manual page 4

Stationary bale wrapper
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This bale wrapper is suitable for use with tractors of a 0.9 minimum class and
with power more than 30 KW equipped with a set of weights on the front axle.
Its design is adapted for it's connection with the Three Point Hitch of the tractor.
The Rotation frame shown as number 3 on the previous page placed on the lower frame shown as
number 2 is connected aligned with the main frame shown as number 1 and is suspended on the three-
point system of tractor. The lower frame together with the rotation frame is secured against deflection by a
movable locking pin. Unloading the bales from the bale wrapper is possible after unlocking the pin and after
the bale wrapper is raised using the Three Point Hitch of the tractor. It then unloads as the lower frame is
tilted and the frame is rotated thus unloading the bales
The movement of the rotation frame and the rotation drums shown as by the number 5 on the previous
page is carried out by the operation of the hydraulic motor, number 6 with overload valve wihich is operated
by the hydraulic pump of tractor. This overload valve provides for smooth starting and stopping of the
machine. It also protects the mechanical components of the drive from damage as a result of excessive
load. The valve is factory-tuned to the engine and sealed. It should not be adjusted unnecessarily..
The drive from the engine is transmitted via a 5/8" (10B) chain on the chain wheel of rotation frame.
This provides for a rotation of the bale along the vertical axis. Next, power is transmitted to the drums
welded via a conical toothed gear and two chain transmissions. This provides a rotation of the bale
with the appropriate ratio in the horizontal axis, this causes a partial overlapping film layers and
tightness of the layer. Roll of film is placed in the feeder (4). The film is stretched through the two tension
rolls connected with toothed gear, which ensures tight adhesion of subsequent layers of film.
The transmission ratio is chosen so as to ensure
the optimal stretching the film, however, if
necessary, stretching can be adjusted by
tightening the nut pressure of film. The maximum
extension/elongation of the film should not
exceed 70% of original length. That is, segment of
film with the length of 10 cm after stretching,
should not be longer than 17cm. should be applied a
polyester film, stretch film, self-adhesive with
stabilizer of ultraviolet rays with a thickness of 0.025-
0.03mm and the width of 500 or 750 mm.

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