Dong Feng DF254G2-6, Руководство по обслуживанию

Страница: 28 / 67

28
a. Lifting & lowering the
farm implements(seeFig.
3) Shift the control handle
(4)
forward, then the attached
implement
will be
lowered down. Fix the
depth stop block (1) at
such a suitable position
that the pin (2) will just
touch the depth stop block
(1) when implement is
lowered
down to the
desired working depth, pull
back handle (4) to the neutral position quickly, so that the implement will be kept at the
preset working depth. When lifting of the implement is needed, just shift the handle
(4) backward, the implement will be lifted up until pin (2) touches lift stop block (3),
then push the handle to the neutral position. Different lifting height can be
obtained if lift stop block (3) is fixed at different positions.
If working depth needs to be adjusted slightly during working, the control handle can
be moved forward or backward a little bit to meet these needs, please note that the
handle must be moved to the neutral position right after the slight adjusting is made. If
lifting speed needs to be adjusted, just screw down or up a little bit the hand wheel of
hydraulic lock valve (6).
b. Farm implement with land-wheel
Push the control handle (4) forward to the “Down” position, oil in the distributor
comes back directly to the gearbox (i.e. oil in the hydraulic distributor has the passage
to oil-return pipe) and the implement will drop down to the ground by its weight. Then
the tilling depth of the implement is to be controlled by its land-wheel.
Points for attention
a Shift the control handle to neutral position immediately after the filling stroke of the
ram is finished, so as to avoid long time opening of the safety valve.
b Disassemble the male connector if no external delivery is needed and reassemble the
plug. Remember to screw up the locking valve (6) to the highest position, otherwise
the hydraulic lift system will not work.
c. Attaching implement to the tractor
Back the tractor to let the hitch point of lower link approach to a farm implement.
Move back and forth the control handle till the connecting holes of lower links and the
hitch pins of the farm implement are in line with each other. Put the hitch pin in
either hole and lock it with a locking pin. At last, adjust upper link to a proper length,
link it together with the column of implement by a long pin and then lock it with a
locking pin.
d. Adjusting the lift linkage
Higher working efficiency, lower working resistance and reliable cultivation quality
could be expected if the lift linkage and corresponding implements are adjusted
Fig. 3 Hydraulic lift
1. Depth stop block 2. Pin 3. Lift stop block
4. Control handle 5. Hydraulic oil distributor
6. Lock valve