Coulter
Overview
1
2
3
4
5
6
7
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.
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.
NOTE
•
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.
¾
In this case replace the coulter discs and
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.
Scraper
The scrapers keep coulter discs and press roll-
ers free of dirt.
¾
Check the function, wear and readjustment
(scraper for coulter discs) of the scrapers at
regular intervals.
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