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GB-FR-NL-22
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CHECK CHAIN ADJUSTMENT
1.
Start the tractor engine and lift the machine
fully by means of the tractor lifting quadrant
lever.
2.
Switch of the engine.
3.
Adjust the tractor RH lift rod length to level the
main crossbeam of the machine.
4.
Measure the height of the crossbeam from the
ground at each end to ensure the machine is
level.
5.
Adjust the length of the check chains so that
there is a minimum of slack when the tractor
arms are fully raised. This will prevent
excessive side swing of the machine when
transporting.
NOTE: If external tractor check chains are fitted, they
should be adjusted so that no part of the lift arms can
foul against the hydraulic pump or any of the fittings
when the machine is in the cutting position. This will
prevent excessive side swing of the machine when
transporting.
FINAL TOP LINK ADJUSTMENT
Before this adjustment can be made, the height of cut
of all three units must be set accurately with the
machine on a level, hard surface (see page 23). The
'A' frame must be vertical.
On the area to be mown, make an initial cut of
approximately 20 metres. Carefully examine the finish
of cut across the width of the swathe - it is likely that
the 2-front units will be cutting lower than the rear unit.
If necessary, to obtain an even cut, extend the top link
by 1½ to 2 turns.
IMPORTANT: Do not lengthen the top link by more
than 3 turns; the need for adjustment in excess of this
indicates that the height of cut settings on the units
were not equal initially.
Any subsequent changes in height of cut will not effect
the length of the top link; but it is important that is the
units are set up by using spacers between the ground
and bottom blade, the top link should be shortened to
its original length, ie. until the turnbuckle contacts the
jubilee clip. After resetting the height of cut by this
method, the top link should again be lengthened by the
same amount.
NOTE: Alternatively, the height of cut setting on the
individual units can of course be adjusted slightly to
obtain an even finish without altering the length of the
top link.
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