Iran Tractor ITM 470, Operators Instruction Book

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Tractor operation 51
100-150 mm (4-6 in).
8. The middle hole ‘B’ is for heavy draft
implements in deep work 150-300
mm (6-12 in), or long over-hanging
implements working shallow, such as
mounted ploughs or chisel ploughs.
Also for increasing the implement
height in transport.
9. The lower hole ‘C’ should not be used
on this range of tractors.
10. Attach the top link to the implement
‘A’ frame and secure with linchpins
and adjust for length.
Fig. 29: ‘A’ frame
On implements which have variable top
and bottom attachment points, the linkage
should be connected in accordance with
the dimensions given in Table 1, depend-
ing on the category of linkage used, see
Fig. 29.
Linkage
type
‘A’
lower link
width
‘B’
Top link
height
Category 1 683 mm 460 mm (min)
Category 2 825 mm 510 mm (min)
Table 1: To ISO standard 730/1-1977(E).
With heavy implements this will reduce
unnecessary strain on the tractor and loss
of lift capacity.
Some implements have two or more
optional positions for the lower links.
Providing the implement will penetrate to
the required depth, reasonably rapidly, it
is usually best to use the lowest pick-up
point provided. This will give the maxi-
mum weight transfer, minimise hydraulic
system pressure and power losses. Also
giving maximum transport height and al-
lowing the use of the correct ‘A’ frame
height setting on the implements.
11. If the levelling lever was used to facili-
tate the attachment of the right-hand
lower link, adjust the right-hand lift
rod to its normal operating length by
screwing the lift rod in or out until the
implement is level.
12. Adjust the top link as necessary to
level the implement.
DETACHING AN IMPLEMENT
WARNING
If two people are involved in detaching
an implement, great care must be taken.
When making any adjustment to the hy-
draulic lift system the person in the area
of the linkage must stand clear.
1. Select a level area as this will make
detaching much easier.
2. Lower the implement using Position
Control, or where necessary, raise the
implement to fix parking stands in po-
sition then lower the implement to the
ground.
3. Stop the engine.
4. Apply the parking brake before dis-
mounting from the tractor.
5. Unscrew the top link to remove the
weight of the implement and remove
the pivot pin. Stow the linchpin, and