21
Fig 12
1
Hints for Sowing with Variable Speed
Gearbox
The gearbox allows for stepless changes in the speed of
the metering shaft and thus the seed rates. Due to the
variations in seed type and application rates there are two
speed ranges available.
By changing from High Speed to Low Speed the range of
settings and control is dramatically increased. The
machine is supplied ex factory set to the high speed
configuration. Change to the Low Speed when the gearbox
setting is down to 10 on the scale and the desired seed
rate cannot be obtained.
To change the speed setting from high to low, remove the
wing nut (1) and chain cover.(2) (Fig 9).
Release the tension on the chain (1) by forcing back the
chain tensioner (2) and hold in place with the crank handle
(Fig 10). Remove the chain from the 19 tooth gearbox
sprocket to the 15 tooth sprocket, then remove the chain
from the 15 tooth output sprocket to the 19 tooth. Check
the chain is correctly aligned then release the chain
tensioner. Ensure the tension roller is correctly aligned with
the chain. Replace guard and calibrate as required.
To Determine the Gearbox Setting after a
Speed Change
For determining the correct gearbox setting after the speed
change, conduct the first test at 50. With the weight of
seed collected find your correct setting with the aid of the
disc calculator, refer Page 20, Fig 8.
Sowing Fine Seeds
For sowing fine seeds the Uni-Seeder is equipped as
standard with a combined normal and fine seed
“Elite”
metering wheel (1). During grain sowing and other larger
varieties of seed both the normal and fine seed metering
wheels are coupled and both rotate. In order to convert the
seed drill to sow fine seed insert the crank handle and rotate
clockwise until the holes
(2) of the fine seed wheel are
visible (Fig 11)
Using the tool supplied (1) disengage the the pin inside
the hole so that the normal metering wheel rotates freely
on the metering shaft (Fig 12).
At this time it would be advisable to close
any shutter slides not required for the fine
seed sowing.
When seed is to be sown again using the
normal metering wheel press the pin, from
the normal metering wheel side (opposite
direction to before), using the tool, back into
the hole of the fine seed wheel thus
reconnecting the drive between the two.
Fig 9
Fig 10
1
Fig 11
1
2
3
2
1
2
Pt. No. 67355
Issue 0906
Changing Speed
1
19T
15T
To Next Page
