Zetor 3321 SUPER, Operator'S Manual

Page: 87 / 233

86
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FRONT THREE POINT HITCH
A 117 A 118 A 119
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FRONT THREE POINT HITCH
Front three point hitch is intended for
attaching of frontal carried agricultural
machines and implements of category II
according to ISO standard.
Within the implement trans-
portation the front three point
hitch must be always hydrauli-
cally locked in lifted position by
the ball valve located on the left
hand side of tractor above the
front axle.
This hydraulic lock is also recommended
in case if no implement is attached into
the front three point hitch.
FRONT THREE POINT HITCH CONT-
ROL
Three point hitch is equipped with two
single or double - acting cylinders that
are controlled by oil from the 2nd and 3
rd selective control valve. Lifting and
lowering is controlled by SCV lever (1):
- lifting is done by moving the lever into
position 6
- lowering is done by moving the lever
into position 5
- position F serves for floating position.
- position N serves for locking of hitch
REGULATION OF LOWERING AND
HYDRAULIC LOCK OF FRONT THREE
POINT HITCH
Lowering speed of hitch with implement
can be controlled by return reduction
valve. Hydraulic lock of front three point
hitch in any position is carried out by
means of the ball valve and by turning
the lever from position A by 90
„
(per-
pendicularly to valve axis) to B position.
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