I-10
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
B) FUNCTIONING OF DRAFT CONTROL
By positioning the control lever (1) for position
control against the backstop (E), the crank (4)
reaches its maximum position of anti-clockwise
rotation. In said position the roller (5) is totally
lowered from the inclined plane of position cam
(6) allowing the anti- clockwise rotation of
flywheel (7) as well as the clockwise rotation of
the transmission lever (9) that is pushed by the
spring of shaft (21) which in turn will position
itself for the discharge position (S). In this way
the position levers will not interfere with the
functioning of the draft control levers.
By positioning the draft control lever (2) against
backstop (F), draft control shaft (16) is caused
to rotate clockwise.
The crank (15) being an integral part of shaft
(16), will reach its extreme position of clockwise
rotation, and by means of tension rod (17) will
move roller (11), the latter acting on the draft
cam (12). This causes flywheel (7) to rotate
clockwise which by means of function shock
absorber (8) produces the anti-clockwise rotation
of transmission lever (9) thus setting the
distributor shaft (21) in delivery position (C) and
consequently lifting the arms.
The arms will come to a stop only as soon as
the piston comes into contact with the pin of
the limit stop (22).
This limit stop, by means of tension rod (23)
causes lever (9) to rotate clockwise, thereby
compressing the spring of friction shock absorber
(8) and thus releasing shaft (21) which now can
move to the neutral position (N) where it is
pushed outward by its spring.
Moving the draft control lever (2) toward
backstop (E), the leverage system will function
in the following manner:
The crank (15), being an integral part of the draft
shaft (16), rotates counter-clockwise and by
means of tension rod (17) causes roller (11) to
slide on flywheel (7).
The roller (11), when it meets the inclined plane
of the draft cam (12), permits the
counterclockwise rotation of flywheel (7) which
by means of shock absorber (8) will rotate
transmission lever (9) in a clockwise manner thus
leaving distributor shaft (21) free to move into
neutral position (N) and continuing the
movement of lever (2), in the discharge position
(S), causing the arms to lower.
In fact, during the initial part of the movement
toward backstop (E), of draft control lever (2)
the corresponding lowering of the arms does not
happen yet.
The traction force on the top link point (20) acts
on tension rod (18) in the direction indicated by
the arrow "positive" causing flywheel (19) to
rotate clockwise together with draft cam (12)
which is fastened to the same pin.
When the inclined plane of draft cam (12) meets
roller (11), a clockwise rotation of flywheel (7)
is achieved this by means of shock absorber (8)
will cause transmission lever (9) to rotate counter-
clockwise thereby moving the distributor shaft
(21) into neutral position (N) and stopping the
movement of the arms.
Hydraulics
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