Coulter; Overview - horsch Pronto 8 SW Operating Instructions Manual

Coulter

Overview

6
5
1 Coulter body
2 Rubber bearing for coulter body (maintenance free)
3 Coulter discs
4 Uniformer
5 Press roller
6 Harrow
7 Coulter pressure adjustment (manual)
The seed is placed with the coulters:
The coulter discs (3) cut through the seedbed
•
and expose the seed horizon.
The seed is then placed between the coulter
•
discs.
The uniformer (4) holds the seed in the furrow.
•
The press roller (5) guides the coulter in depth
•
and ensures closing of the soil.
The harrow (6) covers the seed furrow with
•
soil and calms the flow of soil.
The coulter body is mounted in maintenance-free
rubber bearings (2). It links the coulters and the
press roller and transfers the coulter pressure.
44
7
2
1
3
4
Coulter discs
The coulter discs are arranged at the front at an
angle with slight pretension to each other.
This enables light pulling work and exact open-
ing of the seed channel.
Adjusting the coulter discs
Adjust the preload of the two coulter discs
¾
with the washers. If necessary, add another
washer.
With wet or loose soils the pre-tension of the
•
coulter discs must not be too high to make
sure that the discs will not block up and wear
unevenly.
The coulter discs must be slightly preloaded at
•
the cutting edge. However, turning them eas-
ily without extra force must still be possible.
If one disc rotates, the other one should also
•
reliably turn as well.
If the discs stop and block up because of
•
incorrect preload, too loose soil or wear, the
seed will be placed in bunches.
Wear
This preload will reduce due to wear on the coul-
ter discs or the discs will no longer have contact.
In this case replace the coulter discs and
¾
adjust the preload by removing the washer
again.
Tighten the screws for the coulter disc bear-
ings (socket head cap screw M 16 x 1.5) with
130 - 150 Nm.
Tighten the screws for the coulter discs
(6 x M 8 each) with 38 Nm.
NOTE