Tume JC 3000 Star XL, Руководство пользователя

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16. Harrow adjustment
Figure 33. Harrow.
Basic adjustments to the harrow tines in terms of vertical direction and working width are performed at the
original manufacturer. It is however useful to secure these adjustments during commissioning and, for
example, annually the start of seasonal use. The angle of the tines must always be adjusted according to
working conditions. The support chain adjustments must then be checked periodically, and it must in
particular be ensured that the harrow is raised sufficiently high when the machine is raised to a vertical
position. Adjustments are described below.
The operating depth of the tines can be adjusted by
adjusting the tines vertically .
Vertical adjustments are mainly performed by changing the lower angle of the harrow, by adjusting the
limiting screws (see “A”, Fig. 33). The operating height can also be changed by adjusting the tine mounting
bar installation height in relation to their mounting arms (see “B”, Fig. 33). The adjustment is made by
changing the position of the U-holders on the square tube of the arm.
The harrow tines can be adjusted by changing the adjustment of the limiting screws (see “C”, Fig. 33).
Especially where large amounts of plant waste can be found on the ground, the tines should be adjusted
to a gentle “surrendering" angle. On rigid terrains where basic tillage is carried out by plowing, steeper
angles can be used in order to obtain better ground penetration.
Support chain adjustment must be sufficiently tight so that the harrow tines cannot touch the ground
when the machine is raised. Rough adjustments to the support chain can be made by attaching the spring
to a suitable link in the support chain. Fine tuning can then be done by selecting the most suitable of the
two holes at each end of the support chain.
Because the support chain is fitted with a spring, adequate adjustments can be made to lighten the harrow
in its working position.
Caution! Reversing the machine when the harrow tines are in contact with the ground is
prohibited. Reversing with the harrow in an excessively low position may damage the
harrow and machine tires. Ensure that the harrow support chains are sufficiently adjusted!