Aitchison SEEDMATIC PROFESSIONAL 8140, Manual, Page: 17 / 61

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SEED DEPTH ADJUSTMENT
The seeding depth on the Air-Pro is controlled by the front row of depth and transport
wheels and by the rear packer rollers.
LH WING SHOWN .
Note: When setting the seeding depth make sure you have the disc coulter kits clear
of the ground. The disc coulters can sometimes interfere with the seeding depth.
FRONT DEPTH WHEELS
The transport wheels are also depth wheels, these wheels are set first after all three
tined frames are lowered to the ground. These control the depth of the front of the
centre frame assembly. In conjunction with setting this, set the back-depth adjusters
on the centre frame which are either the roller kit or the rear depth wheels.
Each wing RH/LH have a front “Depth Wheel”; this wheel holds the end of the wing
at the desired seeding depth.
To adjust these wheels, unlock the depth adjustment ratchet and set to the desired
height.
Re-lock the depth adjustment ratchet. Damage or changing depth may occur
if the ratchets are not re-locked.
Use the “Depth Gauge” decals to set all the front wheels at the same height.
Re-
lock.
PACKER ROLLERS
The “Packer Rollers” do two jobs: 1. They help to cover the seed slots and 2. Control
the seeding depth. The Packer Rollers should be set so that the depth of the rear
row of tines is at the same depth as the front row of tines. To adjust these rollers,
loosen the lock nut on the turn-buckles, adjust both turn-buckles in small increments
until the desired depth is achieved.
Ensure that the turn-buckle handle (Pin) is
pointing straight down , re-tighten lock nut. Damage or changing depth may occur
if lock nuts are not re-tightened.
Now adjust the Disc coulters to be shallower than the tip of the points.